Three-dimensional braided electromagnetic device disassembling recycling structure and recycling method thereof

Abstract

The application discloses a three-dimensional woven electromagnetic device disassembling and recycling structure and a recycling method thereof. The structure comprises a three-dimensional woven electromagnetic device body formed by at least two functional areas in the same three-dimensional weaving process; a dissociable interface phase arranged at the interface between the functional areas, which is clamped between the adjacent functional area weaving yarns and combined with the fiber surfaces on both sides, formed in situ after being woven into the independent yarn by the interface yarn loaded with dissociable polymer; a disassembling guide wire embedded in the body along the extension direction of the interface phase, covered and fixed by the woven structure, and with both ends exposed to form pulling end heads; and a modular joint arranged at the end of the body or the interface between the functional areas. The application upgrades the fiber-based electromagnetic device from destructive crushing recycling to non-destructive long-scale fiber recycling, and realizes the compatibility of service reliability and recycling.

Description

Technical Field

[0001] This invention relates to the field of functional composite materials and electromagnetic device manufacturing technology, and in particular to a three-dimensional braided electromagnetic device disassembly and recycling structure and its recycling method. Background Technology

[0002] Three-dimensional braided electromagnetic devices (such as braided electromagnetic shields, braided inductor / magnetic core assemblies, fiber-based motor windings, etc.) are formed by interweaving conductive fibers, magnetic fibers, insulating fibers and structural fibers in the same three-dimensional braiding process. They have advantages such as high specific stiffness, strong designability and adjustable electromagnetic performance in all directions, and are increasingly widely used in aerospace, new energy vehicles and high-end equipment fields.

[0003] However, the integral molding characteristics of such devices lead to fundamental difficulties in their recycling. There are three main recycling routes for existing fiber-reinforced composite materials: First, the pyrolysis method, which recovers fibers by cracking the resin matrix at high temperatures, but the fiber length retention and mechanical properties are significantly reduced, and irreversible damage is caused to the fiber arrangement of the braided structure; second, the solvent depolymerization method, which dissociates the reversibly cross-linked resin matrix as a whole, which can achieve fiber recycling without damage, but the dissociation occurs in the entire matrix phase, and it is impossible to selectively disassemble according to function, making it difficult to sort conductive and magnetic fibers after they are mixed; third, the mechanical crushing method, which can only obtain short-cut fibers for downgraded utilization.

[0004] The common drawbacks of the above methods are that the dissociation boundary cannot be designed, the disassembly path is uncontrollable, and the recycling particle size is coarse, making it impossible to achieve functional-level separation and recycling where "conductive fibers are separated into conductive fibers and magnetic fibers into magnetic fibers." For electromagnetic devices, their value lies precisely in the orderly synergy of different functional fibers—if the recycling process disrupts this order, the fibers may still exist, but they have lost their value for re-weaving into electromagnetic devices.

[0005] While existing technologies include pre-embedding weak interface layers during composite material molding to induce delamination (such as impact-triggered fragile structures) or embedding conductive leads in laminated structures, the former aims at destruction and lacks fiber recycling design, while the latter aims for electrical extraction rather than disassembly guidance. Although thermally reversible bonds, represented by the furan-maleimide Diels-Alder reaction, and water-soluble materials, represented by polyvinyl alcohol, have been used for self-healing or matrix recycling of composite materials, they have not been combined with the interlacing path of braided structures, and have not solved the problems of "where to set the dissociation boundary, along what path to controllable tearing, and to what particle size to dissociate".

[0006] Furthermore, once the weaving process is complete, the dissociable components can no longer be reliably placed into the internal gaps of the yarn interlacing nodes—the interfacial phase must be constructed synchronously during the weaving process, otherwise it will not form a phase, will be discontinuous, and will lack strength.

[0007] Therefore, there is an urgent need for a three-dimensional braided electromagnetic device structure that can construct a controllable dissociation boundary in situ during the braiding process, taking into account both service reliability and functional recyclability, as well as its corresponding recycling method. Summary of the Invention

[0008] The purpose of this application is to provide a three-dimensional braided electromagnetic device disassembled and recyclable structure and recycling method, which solves the problems of undesignable disassembly boundaries, uncontrollable disassembly paths, and inability to achieve functional fiber separation and recycling in the recycling of existing fiber-based electromagnetic devices. This allows the device to maintain overall structural reliability and electromagnetic performance in service, and under recycling conditions, it can be selectively disassembled according to functional areas and each functional fiber can be recycled without damage.

[0009] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0010] In a first aspect, this application provides a three-dimensional braided electromagnetic device structure that is detachable and recyclable, comprising:

[0011] The three-dimensional braided electromagnetic device body is integrally woven from at least two functional areas in the same three-dimensional braiding process. Each functional area is distributed along the functional division of the device and interwoven with each other to form a three-dimensional interwoven structure.

[0012] The dissociable interface phase is disposed at the interface between at least two functional areas, sandwiched between the braiding yarns of two adjacent functional areas, and its two sides are respectively bonded to the fiber surface of the adjacent functional areas, connecting the adjacent functional areas into a whole in the service state; the dissociable interface phase is formed in situ by the interface yarn carrying the dissociable polymer being woven into the interface position as an independent yarn in the three-dimensional braiding process.

[0013] The disassembly guide wire is embedded inside the three-dimensional braided electromagnetic device body along the extension direction of the dissociable interface phase. It is covered and fixed by the braided structure and extends together with the dissociable interface phase. The two ends of the disassembly guide wire are exposed on the end face of the three-dimensional braided electromagnetic device body to form pull ends; and

[0014] Modular connectors are located at the ends of the three-dimensional braided electromagnetic device body or at the boundaries between adjacent functional areas. They include pluggable male and female terminals that are mutually connected and a unlocking structure that acts on one of the male and female terminals. The male and female terminals maintain electrical connection and mechanical fixation between adjacent functional modules in service, and are released and separated by the unlocking structure.

[0015] The interfacial shear strength of the dissociable interfacial phase under service conditions differs from its interfacial shear strength under thermal activation or solvent dissociation conditions by at least one order of magnitude.

[0016] Furthermore, the interfacial shear strength of the dissociable interfacial phase under service conditions is not less than 5 MPa, and the interfacial shear strength under thermal activation conditions or solvent dissociation conditions is reduced to not more than 0.5 MPa.

[0017] Furthermore, at least two functional regions are any two or more of the following: conductive region, magnetocontrol region, insulating region, and structural region distributed along the axial or radial direction of the device. The detachable interface phase is disposed at at least one location between the conductive region and the magnetocontrol region, between the magnetocontrol region and the insulating region, and between the insulating region and the structural region. Alternatively, the structure may also include an outer packaging substrate covering the exterior of the three-dimensional braided electromagnetic device body, with the detachable interface phase sandwiched between the outer surface of the three-dimensional braided electromagnetic device body and the inner surface of the outer packaging substrate.

[0018] Furthermore, the interfacial yarn carrying the dissociable polymer is either a fiber yarn coated with a dissociable polymer coating or the dissociable polymer fiber itself; after being woven into the interfacial position, it is heat-treated at 60 °C to 100 °C or treated according to the curing conditions of the selected dissociable polymer system, so that the dissociable polymer melts, flows and solidifies at the interface to form a continuous dissociable interfacial phase; the thickness of the dissociable interfacial phase is 10 μm to 500 μm, and the volume fraction is 0.5% to 10% of the total volume of the three-dimensional braided electromagnetic device body.

[0019] Furthermore, the dissociable interface phase is a thermally reversible interface phase, with a thermal activation temperature Td of [value missing]. Under these conditions, after being maintained for 10 to 120 minutes, the interfacial shear strength decreased to no higher than The lower interface shear strength is 8 MPa to 25 MPa; the upper limit of the operating temperature of the three-dimensional braided electromagnetic device body is at least lower than the thermal activation temperature Td. The thermally reversible interfacial phase can be a polymer network based on Diels-Alder reversible addition products, formed by the reaction of furanyl-terminated prepolymers with maleimide-terminated crosslinking agents, wherein the molar ratio of furanyl to maleimide groups is 1.0:1.05 to 1.0:1.20, and the number-average molecular weight of the prepolymer is 3000 g / mol to 8000 g / mol; it can also be a polymer network based on thermally reversible urethane bonds, urea bonds, ester bonds, or disulfide bonds; or it can be a polymer network with a softening temperature of Hot melt thermoplastic adhesives, such as ethylene-vinyl acetate copolymers, polyamides, or polyester copolymers.

[0020] Furthermore, the dissociable interfacial phase is a solvent-dissociable interfacial phase, where the dissociable solvent is in... After 10 minutes to 24 hours of exposure, the interfacial shear strength decreased to no higher than 0.5 MPa. The lower interface shear strength is 8 MPa to 20 MPa; the dissociation solvent is at least one of deionized water, an ethanol-water mixture, dimethyl sulfoxide, N,N-dimethylformamide, N-methylpyrrolidone, γ-butyrolactone, dichloromethane, or acetone; the material of the solvent-dissociable interface phase is polyvinyl alcohol, polyethylene oxide, polyvinylpyrrolidone, water-soluble copolyester, polylactic acid, polycaprolactone, or thermoplastic polyurethane, with a thickness of 20 μm to 500 μm.

[0021] Furthermore, the disassembly guide wire is composed of aramid fiber, ultra-high molecular weight polyethylene fiber, poly(p-phenylene benzodioxazole) fiber, glass fiber, or basalt fiber, with a single filament diameter or equivalent diameter of 0.1 mm to 1.0 mm, a tensile strength of not less than 2 GPa, and an elastic modulus of not less than 50 GPa; the number of disassembly guide wires set within each 100 mm device length is 1 to 8; the contact length between the disassembly guide wire and the dissociable interface phase accounts for 80% to 100% of the interface length.

[0022] Furthermore, the male and female ends of the modular connector are connected by snap-fit, thread, or magnetic adsorption to achieve plug-in mating, and the unlocking structure is a press-type, rotation-type, or pull-ring type; the contact resistance between the male and female ends in service condition is not greater than 5mΩ, and the tensile shear strength is not less than 10 MPa; the modular connector is made of polyetheretherketone, polyphenylene sulfide, polyimide, or glass fiber reinforced nylon, and the contact parts are silver-plated copper or gold-plated copper.

[0023] Furthermore, thermally reversible interface phases and solvent-dissociable interface phases are respectively set at different interfaces of the same three-dimensional braided electromagnetic device body; during recycling, the solvent-dissociable interface phase is first solvent-dissociated and the corresponding disassembly guide line is pulled out to separate the corresponding functional modules, and then the thermally reversible interface phase is thermally activated and the remaining disassembly guide lines are pulled out to separate the remaining functional modules.

[0024] Secondly, this application provides a method for recycling a three-dimensional braided electromagnetic device, employing a detachable and recyclable three-dimensional braided electromagnetic device structure as described above, comprising the following steps:

[0025] S1: Identify the chemical type of the dissociable interface phase of the three-dimensional braided electromagnetic device to be recycled and the position of the pull end of the disassembly guide wire;

[0026] S2: Activate the dissociable interfacial phase according to the chemical type, so that the interfacial shear strength is reduced to less than one-tenth of the original strength before activation; for thermally reversible interfacial phases, heat to the thermal activation temperature Td and hold for 10 min to 120 min; for solvent-dissociable interfacial phases, immerse in the corresponding dissociable solvent and hold until the interfacial phase swells, softens or dissolves.

[0027] S3: Separate the male and female ends of the modular connector by unlocking the structure;

[0028] S4: Clamp and pull the end, apply tension along the disassembly guide line at a speed of 0.1mm / s to 10mm / s, so that the crack extends along the disintegratable interface phase, and separate the three-dimensional braided electromagnetic device body into functional modules;

[0029] S5: The separated functional modules are subjected to at least one of the following processes: cleaning, drying, and untwisting, as well as sorting, to recover conductive fibers, magnetic fibers, insulating fibers, and structural fibers.

[0030] The beneficial effects of this invention are:

[0031] 1. The dissociation boundary changes from "post-hoc randomness" to "design-controllable".

[0032] The dissociable interface phase of this application is formed in situ by the interface yarn being woven in as an independent yarn in the three-dimensional weaving process. It conformally and continuously integrates with the interface of the functional area, changing "where dissociation occurs" from a random result during recycling to an active selection during the structural design stage. This achieves the fixed-point and selective dissociation of the functional area, which is an effect that no post-processing recycling method can achieve.

[0033] 2. Service reliability and recyclability have changed from being "mutually exclusive" to being "compatible and coexisting".

[0034] This application adopts a dual-state interface design of "high strength in service state - low strength in activation state" and uses the temperature margin between the upper limit of device operating temperature and activation temperature as the design criterion. This makes the dissociable interface phase exhibit a reliable connection that cannot be cracked under service environment, and it only opens for dissociation under artificially applied recycling conditions. Structurally, this eliminates the dilemma of "sacrificing reliability for recycling" or "abandoning recycling for reliability".

[0035] 3. The disassembly path is controlled, and the functional module structure is complete.

[0036] The disassembly guide line of this application is simultaneously woven in during the weaving process and is covered and fixed by the weaving structure, extending together with the interface phase, with both ends exposed to form pull ends; after activation, the crack is pulled along the guide line, and the crack is stably constrained within the interface phase to expand along a predetermined path without penetrating the functional area. The device is torn into complete functional modules according to the design plan, avoiding fiber damage and module debris caused by disordered tearing. Attached Figure Description

[0037] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1This is a cross-sectional schematic diagram of the detachable and recyclable structure of the present invention.

[0039] Figure 2 This is a flowchart of the recycling method of the present invention.

[0040] Figure 3 This is a schematic diagram of the thermally reversible interface phase before and after activation according to the present invention.

[0041] Figure 4 This is a schematic diagram illustrating the classification and reuse of recycled fibers according to the present invention.

[0042] Figure 5 This is a schematic diagram showing the arrangement and pulling direction of the disassembly guide lines of the present invention.

[0043] 1-Three-dimensional braided electromagnetic device body; 2-Conductive area; 3-Magnetic control area; 4-Insulation area; 5-Structural area; 6-Dissociable interface phase; 7-Outer encapsulation substrate; 8-Disassembly guide wire; 9-Pull-out end; 10-Modular connector. Detailed Implementation

[0044] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0045] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0046] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0047] Reference Figure 1 , Figure 3 , Figure 4 and Figure 5 As shown, this is one embodiment of the present invention, which provides a three-dimensional braided electromagnetic device structure that is detachable and recyclable, comprising:

[0048] The three-dimensional braided electromagnetic device body is integrally woven from at least two functional areas in the same three-dimensional braiding process. Each functional area is distributed along the functional division of the device and interwoven with each other to form a three-dimensional interwoven structure.

[0049] The dissociable interface phase is disposed at the interface between at least two functional areas, sandwiched between the braiding yarns of two adjacent functional areas, and its two sides are respectively bonded to the fiber surface of the adjacent functional areas, connecting the adjacent functional areas into a whole in the service state; the dissociable interface phase is formed in situ by the interface yarn carrying the dissociable polymer being woven into the interface position as an independent yarn in the three-dimensional braiding process.

[0050] The disassembly guide wire is embedded inside the three-dimensional braided electromagnetic device body along the extension direction of the dissociable interface phase. It is covered and fixed by the braided structure and extends together with the dissociable interface phase. The two ends of the disassembly guide wire are exposed on the end face of the three-dimensional braided electromagnetic device body to form pull ends; and

[0051] Modular connectors are located at the ends of the three-dimensional braided electromagnetic device body or at the boundaries between adjacent functional areas. They include pluggable male and female terminals that are mutually connected and a unlocking structure that acts on one of the male and female terminals. The male and female terminals maintain electrical connection and mechanical fixation between adjacent functional modules in service, and are released and separated by the unlocking structure.

[0052] The interfacial shear strength of the dissociable interfacial phase under service conditions differs from its interfacial shear strength under thermal activation or solvent dissociation conditions by at least one order of magnitude.

[0053] In this embodiment, (a) the three-dimensional braided electromagnetic device body 1

[0054] The three-dimensional braided electromagnetic device body 1 is the functional and load-bearing main body of the device, and is integrally woven from at least two functional areas in the same three-dimensional braiding process. In this embodiment, the functional areas include a conductive area 2, a magnetic control area 3, an insulating area 4, and a structural area 5, which are distributed sequentially along the device axis. The conductive area 2 is woven in with copper-coated conductive fiber bundles as braiding yarns, and undertakes the functions of current conduction and electromagnetic shielding. The magnetic control area 3 is woven in with iron-based magnetic fibers and reinforcing fibers, and undertakes the functions of magnetic circuit conduction and magnetic field regulation. The insulating area 4 is woven in with aramid fibers after epoxy impregnation, and undertakes the functions of inter-turn and inter-electrode insulation. The structural area 5 is woven in with high-modulus carbon fiber or glass fiber, and undertakes the functions of shape maintenance and mechanical load bearing. The functional zones are distributed according to the functional divisions of the device, and are achieved through a zonal planning of yarn carriers on the braiding machine. That is, on the same braiding disc, yarns performing different functions are loaded onto the corresponding yarn carriers in the corresponding zones. With the rotation of the angular wheel and the exchange movement of the yarn carriers, the yarns interweave in space, forming a non-layered three-dimensional interwoven structure. There are no adhesive surfaces or mechanical seams between the functional zones; instead, they interlock with each other in the form of interlacing nodes. Because the four types of functional fibers are interwoven and formed in one process, the four functions of conductivity, magnetism, insulation, and load bearing are continuously transitioned within the axial cross-section of the three-dimensional braided electromagnetic device body 1, avoiding the unavoidable interface misalignment, impedance abrupt changes, and stress concentration problems in multi-process assembly schemes. It should be noted that the number of functional zones is not limited to the above four; a minimum of two is sufficient, and the selection of the remaining functional zones depends on the electromagnetic functional requirements of the device.

[0055] (ii) Dissociable interface phase 6

[0056] The detachable interface phase 6 is the core function of this embodiment for achieving "controllable detachment," and is located at the interface between at least two functional areas. (Refer to...) Figure 3As shown, the dissociable interface phase 6 is sandwiched between the braided yarns of two adjacent functional areas, with its two sides respectively bonded to the fiber surfaces of the adjacent functional areas, connecting the adjacent functional areas into a whole in service. That is, the dissociable interface phase 6 forms a continuous thin layer with a thickness of micrometers to sub-millimeters inside the three-dimensional braided electromagnetic device body 1. The two surfaces of this thin layer are in direct contact and bonded to the fiber surfaces of functional areas such as the conductive area 2 and the magnetronically controlled area 3, and the service load is transferred between adjacent functional areas through this thin layer. The formation method of the dissociable interface phase 6 is the key difference between this embodiment and the existing post-coating or potting scheme: the dissociable interface phase 6 is formed in situ by the interface yarn carrying the dissociable polymer being woven into the interface position as an independent yarn in the three-dimensional braiding process. Specifically, in the digital model planning stage before weaving begins, an independent yarn path is reserved at a preset interface position on the main body 1. Aramid yarns coated with a removable polymer coating are loaded onto a dedicated yarn carrier, allowing them to participate in interweaving along with the functional yarns. During weaving, this interface yarn path shuttles back and forth within the preset interface position with the yarn carrier, continuously distributed in the interweaving node gaps between the two functional areas. After weaving is completed, an application is made to the prefabricated body... In the heat treatment process, the coating polymer melts and flows upon heating, fully wetting the fiber surface of adjacent functional areas through capillary penetration of the melt. It forms molecular-level bonds with the functional groups on the fiber surface and the sizing agent layer. Subsequently, it is cooled and cured or cross-linked according to the curing conditions of the selected polymer system, thereby forming a continuous, defect-free, dissociable interface phase 6 in situ at the interface location. The thickness of the dissociable interface phase 6 is 10 μm to 500 μm, and its volume fraction is 0.5% to 10% of the total volume of the three-dimensional braided electromagnetic device body 1. The reason why it must be woven in the form of yarn simultaneously during the braiding process is that after the braiding is completed, the gaps between the interlacing nodes of the preform are completely filled by the functional yarns. The resin applied afterward or potting can only remain on the surface of the preform and in the external gaps, and cannot penetrate into the interior of the interlacing nodes. The resulting interface phase is discontinuous and has penetrating defects. During service, cracks will initiate at the defects, leading to premature failure. During recycling, the cracks will bypass the weak sections and enter the functional areas, neither of which is acceptable. In this embodiment, the yarn weaving method allows the dissociable polymer to enter the deepest part of the interwoven structure through a "first placement, then phase formation" path. The continuity and conformity of phase formation are guaranteed by the weaving process itself. This is the premise for the engineering validity of this concept and the substantial difference between this embodiment and existing interface phase technologies.

[0057] Between the service state and the activated state, the interfacial shear strength of the dissociable interfacial phase 6 differs by at least one order of magnitude. In this embodiment, a polymer network based on the Diels-Alder reversible addition product is used as the material for the dissociable interfacial phase 6: it is formed by reacting a furan-terminated prepolymer with a maleimide-terminated crosslinking agent, with a molar ratio of furan groups to maleimide groups of [missing information]. The number-average molecular weight of the prepolymer ranges from 3000 g / mol to 8000 g / mol. At room temperature, Diels-Alder addition bonds between the furan ring and the maleimide ring crosslink the polymer network into a dense solid phase. The lower interface shear strength is 8MPa to 25MPa, which is sufficient to maintain a reliable connection between functional areas under service conditions such as vibration, shock, and temperature change; when heated to the thermal activation temperature Td (for this system... C, This embodiment is After holding for 10 to 120 minutes, the Diels-Alder addition bonds undergo a reverse reaction and dissociate, the polymer network decrosslinks and softens, and the interfacial shear strength decreases to no more than 0.5 MPa. Alternatively, the dissociable interfacial phase 6 can also be a polymer network based on thermally reversible urethane, urea, ester, or disulfide bonds, or a softening temperature of [missing information]. The activation mechanisms of ethylene-vinyl acetate copolymers, polyamides, polyester copolymers, and other hot-melt thermoplastic adhesives are all temperature-triggered reversible bond dissociation or melt softening, with equivalent effects. To ensure service safety, the upper limit of the operating temperature of the three-dimensional braided electromagnetic device body 1 is set at least 20°C below the thermal activation temperature Td, ensuring sufficient margin between the service environment temperature and the activation temperature, and preventing accidental activation during service.

[0058] (III) Disassemble the guide wire 8 and the pull end 9

[0059] Reference Figure 1 As shown, the disassembly guide wire 8 is embedded inside the body 1 of the three-dimensional braided electromagnetic device along the extension direction of the dissociable interface phase 6. The disassembly guide wire 8 is composed of aramid fiber, ultra-high molecular weight polyethylene fiber, poly(p-phenylene benzodioxazole) fiber, glass fiber, or basalt fiber. In this embodiment, aramid fiber with a diameter of 0.5 mm and a tensile strength of 3 GPa is used; the diameter of the single filament or the equivalent diameter is 0.1 mm to 1.0 mm, the tensile strength is not less than 2 GPa, and the elastic modulus is not less than 50 GPa, so as to ensure that the guide wire itself does not break or plastically elongate during the pulling process; the number of disassembly guide wires 8 is 1 to 8 per 100 mm of device length, and the contact length between the guide wire and the dissociable interface phase 6 accounts for 80% to 100% of the interface length, ensuring that the tearing stress applied by the guide wire is always available during the advancement of the crack front, and no missing guide segment appears.

[0060] The disassembly guide wire 8 is introduced in the same way as the detachable interface phase 6, that is, an independent yarn path is reserved in the braided digital model, and the yarn carrier of the braiding machine is synchronously woven into the body 1 of the three-dimensional braided electromagnetic device as an independent yarn path. After being woven in, the disassembly guide wire 8 is covered and fixed by the surrounding braided structure, and extends together with the detachable interface phase 6—that is, the direction of the guide wire in the device is consistent with the extension direction of the interface phase, and it is arranged along the entire length of the interface phase. The two ends of the disassembly guide wire 8 are exposed on the end face of the three-dimensional braided electromagnetic device body 1 to form pull ends 9 for clamping during retrieval. The significance of covering and fixing is that: during service, the guide wire is locked by the braided nodes and will not move, wear or loosen due to vibration; when the guide wire is pulled during retrieval, its tension is transmitted to the entire length of the interface phase through the covering structure, so that the crack front advances along the interface phase as a whole rather than local point tearing.

[0061] (iv) Modular connector 10

[0062] Reference Figure 1 As shown, the modular connector 10 is located at the end of the three-dimensional braided electromagnetic device body 1 or at the boundary between adjacent functional areas, serving as a mechanical interface for achieving "module-level separation followed by interface-level tearing." The modular connector 10 includes a pluggable male and female terminals that interlock, and an unlocking structure acting on one of the male and female terminals. The male and female terminals are connected by a snap-fit, thread, or magnetic adsorption; this embodiment uses a snap-fit ​​type. The unlocking structure can be a press-type, a rotation type, or a pull ring type; this embodiment uses a press-type. In service, the male and female terminals maintain electrical connection and mechanical fixation between adjacent functional modules, with a contact resistance not exceeding 5 mΩ and a tensile shear strength not less than 10 MPa. The contacts are made of silver-plated copper or gold-plated copper to ensure conductive continuity. The connector body is made of engineering plastics such as polyetheretherketone, polyphenylene sulfide, polyimide, or glass fiber reinforced nylon to balance insulation and strength. Under the action of the unlocking structure, the snap-fit ​​disengages, the male and female terminals are released from fixation and separated, and the end constraint is eliminated. The presence of the modular joint 10 means that the ends of the three-dimensional braided electromagnetic device body 1 are no longer subject to the reaction constraint of the tearing load during recycling, and the crack propagation is completely borne by the interface phase path, thus avoiding the end functional fibers from being pulled apart.

[0063] (v) Work Process

[0064] Reference Figure 2As shown, the recycling process is performed in the following order: Step S1: Identify the chemical type of the dissociable interface phase 6 of the device to be recycled and the position of the pull end 9, and determine the activation method and clamping scheme accordingly. Step S2: Activate the dissociable interface phase 6 according to its chemical type: For thermally reversible interface phases, heat the entire device to the thermal activation temperature Td and hold it for 10 to 120 minutes, so that the interfacial shear strength is reduced to less than one-tenth of its pre-activation value; for solvent-dissociable interface phases, immerse the device in the corresponding dissociable solvent and hold it until the interface phase swells, softens, or dissolves. Step S3: Press the unlocking structure to separate the male and female ends of the modular connector 10 and release the end constraints. Step S4: Clamp and pull the end 9, and apply a pulling force along the disassembly guide line 8 at a speed of 0.1 mm / s to 10 mm / s. The pulling speed is controlled to match the crack front advancement speed with the dissociation-softening dynamics of the interface phase: if the pulling speed is too fast, the crack may penetrate into the functional area; if it is too slow, the dissociated section will re-cool and re-bond. Under the controlled pulling speed, the dissociable interface phase 6, whose strength drops sharply after activation, becomes the path with the lowest crack propagation resistance in the cross section. The crack is stably constrained to advance along the interface phase 6, and the three-dimensional braided electromagnetic device body 1 is separated into independent functional modules such as conductive modules and magnetic control modules. Step S5: Perform at least one of the following treatments on each functional module: cleaning, drying, and untwisting, and sort them to recover conductive fibers, magnetic fibers, insulating fibers, and structural fibers. Taking the conductive module as an example, after cleaning and drying, untwisting yields a long-scale conductive fiber bundle.

[0065] Reference Figure 5 As shown, for devices with more functional areas and more complex interface types, thermally reversible interface phases and solvent-dissociable interface phases can be set at different interfaces of the same three-dimensional braided electromagnetic device body 1. During recycling, the corresponding functional modules are first separated by solvent dissociation under lower activation conditions, and then the remaining modules are separated by thermal activation under higher activation conditions. This achieves step-by-step disassembly from low to high, avoiding thermal damage to the separated modules caused by subsequent high-temperature steps, and further improving the cleanliness and integrity of the recovered multifunctional area devices.

[0066] As can be seen from the above structure, this embodiment solves the constructability problem of the disintegratable boundary inside the braided structure by "in-situ weaving of interface yarns into the phase", solves the orientation and controllability problem of the crack path after activation by "synchronous weaving and covering fixation of guide lines", solves the compatibility problem of service reliability and recyclability by "dual-state strength cliff", and solves the end constraint problem of tear load by "modular joint unlocking". The four elements work together and are indispensable to form a complete disassembly and recycling scheme, realizing the transformation of fiber-based electromagnetic devices from destructive crushing and recycling to non-destructive functional level recycling.

[0067] Furthermore, the interfacial shear strength of the dissociable interfacial phase under service conditions is not less than 5 MPa, and the interfacial shear strength under thermal activation conditions or solvent dissociation conditions is reduced to not more than 0.5 MPa.

[0068] In this embodiment, as a preferred limitation of the intensity cliff of the dissociable interface phase 6, the dissociable interface phase 6 is in The interfacial shear strength under service conditions is not less than 5 MPa, which matches the measured 12 MPa (thermally reversible interfacial phase) and 10 MPa (solvent-dissociable interfacial phase) in the examples, and is sufficient to withstand vibration, impact and temperature change conditions without cracking; after heating at 140°C... After activation treatment such as soaking in deionized water for 2 hours, the interfacial shear strength decreased to 0.3 MPa and 0.2 MPa, respectively, neither exceeding 0.5 MPa, which is only one-fortieth to one-fiftieth of the service state. This makes the activated dissociable interfacial phase 6 the path with the lowest resistance to crack propagation within the cross section of the three-dimensional braided electromagnetic device body 1, ensuring that the crack stably propagates along the interfacial phase 6 without penetrating the functional area when the guide wire 8 is pulled and disassembled, thus balancing service reliability and recyclability.

[0069] Furthermore, at least two functional regions are any two or more of the following: conductive region, magnetocontrol region, insulating region, and structural region distributed along the axial or radial direction of the device. The detachable interface phase is disposed at at least one location between the conductive region and the magnetocontrol region, between the magnetocontrol region and the insulating region, and between the insulating region and the structural region. Alternatively, the structure may also include an outer packaging substrate covering the exterior of the three-dimensional braided electromagnetic device body, with the detachable interface phase sandwiched between the outer surface of the three-dimensional braided electromagnetic device body and the inner surface of the outer packaging substrate.

[0070] In this embodiment, as a preferred limitation of the layout of the dissociable interface phase 6, the functional areas are distributed along the axial or radial direction of the device, and can be any two or more of the conductive area 2, the magnetized area 3, the insulating area 4, and the structural area 5. The dissociable interface phase 6 is correspondingly disposed at least once between the conductive area 2 and the magnetized area 3, between the magnetized area 3 and the insulating area 4, and between the insulating area 4 and the structural area 5. When the device also needs to resist the external environment, the structure also includes an outer encapsulation substrate 7 covering the three-dimensional braided electromagnetic device body 1. At this time, the dissociable interface phase 6 is sandwiched between the outer surface of the three-dimensional braided electromagnetic device body 1 and the inner surface of the outer encapsulation substrate 7, so that the encapsulation layer and the functional body also have controlled dissociation capability. When recycling, the encapsulation layer is peeled off along the interface phase 6 in one piece, avoiding the problem of the encapsulation resin being firmly bonded to the functional body in the prior art and needing to be mechanically crushed and removed during recycling. This achieves "encapsulation and function being recyclable simultaneously", further expanding the applicability of this structure in encapsulated electromagnetic devices.

[0071] Furthermore, the interfacial yarn carrying the dissociable polymer is either a fiber yarn coated with a dissociable polymer coating or the dissociable polymer fiber itself; after being knitted into the interfacial position... The heat treatment or curing conditions of the selected dissociable polymer system are used to melt, flow and solidify the dissociable polymer at the interface to form a continuous dissociable interface phase; the thickness of the dissociable interface phase is 10 μm to 500 μm and the volume fraction is 0.5% to 10% of the total volume of the three-dimensional braided electromagnetic device body.

[0072] In this embodiment, as a preferred limitation of the dissociable interface phase 6 phase formation process, the interface yarn carrying the dissociable polymer can take one of two forms: one is a fiber yarn with a surface coated with a dissociable polymer coating, the coating being pre-loaded onto the fiber surface through an impregnation-drying process, with the core fiber providing weaving strength; the other is the dissociable polymer fiber itself, directly using polymer melt-spun yarn as the interface yarn, suitable for applications requiring high purity of the interface phase and without introducing a second fiber. After the interface yarn is woven into the interface position, it undergoes... In the heat treatment process, the dissociable polymer in the coating or fiber melts and flows upon heating, wetting the fiber surface of adjacent functional areas and filling the gaps in the interlacing nodes through capillary action. Subsequently, it is cooled and cured or crosslinked according to the curing conditions of the selected system, forming a continuous dissociable interface phase 6 in situ at the interface. The thickness of the dissociable interface phase 6 is controlled between 10 μm and 500 μm—too thin and the phase formation will be discontinuous and the service strength will be insufficient; too thick and the activation time will be prolonged and the effective interlacing of the functional areas will be weakened; the volume fraction is controlled between 0.5% and 10% of the total volume of the three-dimensional braided electromagnetic device body 1, taking into account the integrity of the interface bonding, the electromagnetic performance of the device, and the amount of polymer residue after recycling, which is a balance window between phase formation quality and service performance.

[0073] Furthermore, the dissociable interface phase is a thermally reversible interface phase, with a thermal activation temperature Td of [value missing]. Under these conditions, after being maintained for 10 to 120 minutes, the interfacial shear strength decreased to no higher than The lower interface shear strength is 8 MPa to 25 MPa; the upper limit of the operating temperature of the three-dimensional braided electromagnetic device body is at least lower than the thermal activation temperature Td. The thermally reversible interfacial phase can be a polymer network based on the Diels-Alder reversible addition product, formed by the reaction of furan-terminated prepolymers with maleimide-terminated crosslinking agents, wherein the molar ratio of furan groups to maleimide groups is [insert molar ratio here]. to The number-average molecular weight of the prepolymer is 3000 g / mol to 8000 g / mol; it can also be a polymer network based on thermally reversible urethane bonds, urea bonds, ester bonds, or disulfide bonds; or it can be a polymer with a softening temperature of Hot melt thermoplastic adhesives, such as ethylene-vinyl acetate copolymers, polyamides, or polyester copolymers.

[0074] Furthermore, the dissociable interfacial phase is a solvent-dissociable interfacial phase, where the dissociable solvent is in... After 10 minutes to 24 hours of exposure, the interfacial shear strength decreased to no higher than 0.5 MPa. The lower interface shear strength is 8 MPa to 20 MPa; the dissociation solvent is at least one of deionized water, an ethanol-water mixture, dimethyl sulfoxide, N,N-dimethylformamide, N-methylpyrrolidone, γ-butyrolactone, dichloromethane, or acetone; the material of the solvent-dissociable interface phase is polyvinyl alcohol, polyethylene oxide, polyvinylpyrrolidone, water-soluble copolyester, polylactic acid, polycaprolactone, or thermoplastic polyurethane, with a thickness of 20 μm to 500 μm.

[0075] In this embodiment, the first type of chemical system of the dissociable interface phase 6 is a thermally reversible interface phase. Its activation and service behavior are triggered by a single variable of temperature, which is suitable for occasions where heat is the only reliable energy source and the service environment temperature of the device is controllable.

[0076] Regarding strength and temperature parameters, the thermally reversible interface phase has a thermal activation temperature Td of...

[0077] Under these conditions, after being held for 10 to 120 minutes, the interfacial shear strength decreased to no more than 0.5 MPa. The lower interface shear strength is 8 MPa to 25 MPa. (Lower limit of Td) It ensures that it will not be accidentally activated due to fluctuations in ambient temperature during storage and transportation at room temperature; upper limit This is limited by the heat resistance limit of the functional fibers—exceeding this temperature, the coating of the conductive fiber bundle and the magnetic domain stability of the magnetic fibers may be damaged. The setting of the holding time window of 10 min to 120 min is based on the kinetics of reversible bond dissociation: if it is less than 10 min, the heat is not fully conducted to the full thickness of the interface phase 6 inside the three-dimensional braided electromagnetic device body 1, resulting in "false activation" where the surface layer has dissociated but the core is still bonded, causing the guide wire 8 to break midway when being pulled apart; if it is more than 120 min, it will increase energy consumption and may cause thermal oxidation and deterioration of the functional fibers.

[0078] Crucially, the temperature margin design principle is as follows: the upper limit of the operating temperature of the three-dimensional braided electromagnetic device body 1 should be at least lower than the thermal activation temperature Td.

[0079] The establishment of this criterion stems from the verification examination of this embodiment—the three-dimensional braided electromagnetic device body 1 is below... ambient temperature After 1000 hours of continuous operation, the dissociable interface phase 6 showed no cracking and the inductance change was less than 5%, proving that... The margin is sufficient to cover local temperature rises under service conditions, temperature fluctuations at interface stress concentration points, and the slow relaxation of reversible bonds at sub-activation temperatures; conversely, if the margin is insufficient, reversible bonds will undergo cumulative partial decrosslinking during the service life, premature weakening of interface phase 6, and failure of the dual-state strength cliff. Therefore, this criterion is not a simple list of parameters, but rather couples service life reliability with recycling activation reliability into an executable structural design constraint, which is a direct engineering manifestation of the inventive concept of this embodiment.

[0080] In terms of chemical implementation, the thermally reversible interface phase is preferably a polymer network based on the Diels-Alder reversible addition product: formed by the reaction of a furanyl-terminated prepolymer with a maleimide-terminated crosslinking agent, wherein the molar ratio of furanyl to maleimide groups is [insert molar ratio here]. The number-average molecular weight of the prepolymer ranges from 3000 g / mol to 8000 g / mol. Its mechanism of action is as follows: at room temperature, the furan ring and maleimide ring undergo Diels-Alder cycloaddition to form a bridged ring addition product, which crosslinks the prepolymer chains into a dense three-dimensional network, imparting high strength to interfacial phase 6. When heated to Td, the addition product undergoes a reverse Diels-Alder reaction, the bridged ring dissociates, the crosslinking points break, the network decrosslinks and softens, and the strength drops sharply. After cooling, the furan group and maleimide group can re-add, so interfacial phase 6 even possesses the repairability to re-bond after accidental activation. The molar ratio is limited to a slightly excess of maleimide groups. This ensures sufficient furanyl conversion and a complete cross-linked network. Excessive maleimide groups can lead to irreversible side reactions with the fiber surface at high temperatures, compromising reversibility. A number-average molecular weight of 3000 g / mol to 8000 g / mol balances phase flowability (too low a molecular weight results in coating liquid flow and a thinner phase) and network cohesive strength (too high a molecular weight results in high melt viscosity and poor wetting).

[0081] As an alternative, the thermally reversible interface phase can also be a polymer network based on thermally reversible urethane, urea, ester, or disulfide bonds: urethane and urea bonds undergo dynamic exchange of dissociation and recombination at high temperatures, while ester and disulfide bonds achieve network reconstruction through ester exchange and dynamic reversible cleavage of disulfide bonds, respectively. Each system can achieve a dual-state switching of "crosslinked solid phase – dissociation softening" near Td. Those skilled in the art can apply it according to the coating process of the interface yarn and the curing conditions of the selected system, with equivalent results. Furthermore, a softening temperature of [insert softening temperature here] can also be used. Hot-melt thermoplastic adhesives, such as ethylene-vinyl acetate copolymers, polyamides, or polyester copolymers, have an activation mechanism of physical melting rather than chemical bond dissociation. They are the simplest to process and have the lowest cost, making them suitable for applications where repairability is not required and cost-effectiveness is the priority.

[0082] Regardless of the specific material used, the thermally reversible interface phase employs a dual-state design of "separation of service temperature and activation temperature + strength difference of at least one order of magnitude," working in conjunction with the disassembly guide line 8 and modular connector 10: during recycling, the three-dimensional braided electromagnetic device body 1 is heated to Td for heat preservation, then the male and female ends are separated by pressing the unlocking structure, and then the end 9 is clamped and pulled along the disassembly guide line 8 at a controlled pulling speed. The three-dimensional braided electromagnetic device body 1 is then neatly separated into functional modules along the thermally reversible interface phase, achieving compatibility between service reliability and recyclability.

[0083] Furthermore, the disassembly guide wire is composed of aramid fiber, ultra-high molecular weight polyethylene fiber, poly(p-phenylene benzodioxazole) fiber, glass fiber, or basalt fiber, with a single filament diameter or equivalent diameter of 0.1 mm to 1.0 mm, a tensile strength of not less than 2 GPa, and an elastic modulus of not less than 50 GPa; the number of disassembly guide wires set within each 100 mm device length is 1 to 8; the contact length between the disassembly guide wire and the dissociable interface phase accounts for 80% to 100% of the interface length.

[0084] In this embodiment, as a limitation on the selection and arrangement of the disassembly guide line 8, the disassembly guide line 8 is composed of high-strength and high-modulus fibers selected from aramid fibers, ultra-high molecular weight polyethylene fibers, poly(p-phenylene benzodioxazole) fibers, glass fibers, or basalt fibers. The diameter of a single filament or the equivalent diameter is 0.1 mm to 1.0 mm, the tensile strength is not less than 2 GPa, and the elastic modulus is not less than 50 GPa. The lower limit of strength ensures that the guide line transmits sufficient tear load before the interface phase cracks during pulling without breaking itself, and the lower limit of modulus ensures that the load is transmitted to the crack front with minimal elastic loss. The upper limit of diameter avoids the guide line being too thick, which would crowd out the interlacing nodes of the functional area and weaken the service strength. One to eight wires are set within every 100 mm of device length. Too few wires will concentrate the tearing load locally and make it easy to penetrate into the functional area, while too many wires will complicate the weaving process. The contact length between the disassembly guide wire 8 and the dissociable interface phase 6 accounts for 80% to 100% of the interface length, ensuring that the crack is always within the stress field of the guide wire when it propagates along the entire length of the interface phase 6, and that there is no uncontrolled detour due to missing guide segments. Together with the covering and fixing of the three-dimensional braided electromagnetic device body 1, it constitutes a complete and controllable guarantee for the disassembly path.

[0085] Furthermore, the male and female ends of the modular connector are connected by snap-fit, thread, or magnetic adsorption to achieve plug-in mating, and the unlocking structure is a press-type, rotation-type, or pull-ring type; the contact resistance between the male and female ends in service condition is not greater than 5mΩ, and the tensile shear strength is not less than 10 MPa; the modular connector is made of polyetheretherketone, polyphenylene sulfide, polyimide, or glass fiber reinforced nylon, and the contact parts are silver-plated copper or gold-plated copper.

[0086] In this embodiment, as a connection method and performance limitation of the modular connector 10, the male and female ends are connected by snap-fit, thread, or magnetic adsorption to achieve plug-in engagement. The unlocking structure is correspondingly selected as press-type, rotation-type, or pull-ring type. This embodiment adopts snap-fit ​​engagement and press-type unlocking to achieve quick separation with one hand without occupying tools. The contact resistance between the male and female ends in service condition is not greater than 5mΩ to ensure that the conductive continuity between functional modules is not degraded due to the connection of the connector. The tensile shear strength is not less than 10MPa to ensure that the mechanical fixing capacity of the connector matches the braiding strength of the connected functional area, and to prevent the connector from becoming a weak link of the device. The modular connector 10 is made of engineering plastics such as polyetheretherketone, polyphenylene sulfide, polyimide, or glass fiber reinforced nylon, taking into account heat resistance (withstanding repeated thermal cycling at the thermal activation temperature Td without deformation), insulation, and specific strength. The contact parts are silver-plated copper or gold-plated copper. The silver and gold plating does not oxidize in repeated insertion and removal and recycling sorting environments, and the contact resistance is stable. Thus, the modular joint 10 serves as the electrical connection and mechanical fixation between adjacent functional modules during service. During recycling, it is released from fixation via the unlocking structure and separated first, eliminating the end constraint of the tearing load. This allows the crack propagation to be completely borne by the predetermined path of the detachable interface phase 6, which is the mechanical prerequisite for realizing the recycling sequence of "module-level separation first, interface-level tearing later".

[0087] Furthermore, thermally reversible interface phases and solvent-dissociable interface phases are respectively set at different interfaces of the same three-dimensional braided electromagnetic device body; during recycling, the solvent-dissociable interface phase is first solvent-dissociated and the corresponding disassembly guide line is pulled out to separate the corresponding functional modules, and then the thermally reversible interface phase is thermally activated and the remaining disassembly guide lines are pulled out to separate the remaining functional modules.

[0088] In this embodiment, as a preferred implementation of the multi-system combination of dissociable interface phase 6, thermally reversible interface phases and solvent-dissociable interface phases of different chemical types are respectively set at different interfaces of the three-dimensional braided electromagnetic device body 1. For example, a solvent-dissociable interface phase is set between the insulating region 4 and the structural region 5, and a thermally reversible interface phase is set between the magnetocontrol region 3 and the structural region 5. The two types of interface phases 6 are respectively equipped with their own disassembly guide lines 8 and pull ends 9. During recycling, a step-by-step sequence of "solvent first, then thermal activation" is performed: first, the solvent-dissociable interface phase is solvent-dissociated, that is, the corresponding area of ​​the three-dimensional braided electromagnetic device body 1 is immersed in the solvent. In the dissociation solvents on both sides, after the interfacial phase swells and softens, the corresponding disassembly guide line 8 is pulled out to separate the heat-sensitive functional modules, such as the insulation module, and remove them from the post-processing station. Then, the thermally reversible interfacial phase is thermally activated, and the remaining portion is heated to the thermal activation temperature Td and held at that temperature. The remaining disassembly guide lines 8 are then pulled out to separate the remaining functional modules. This sequence is based on the principle that disassembly in low-temperature solvents first prevents heat-sensitive fibers from undergoing subsequent... The prolonged heat exposure during the thermal activation step prevents the resin phase of the insulating fibers and the polymer-based magnetic fiber bonding phase from deteriorating at high temperatures. Conversely, if thermal activation is performed first, the separated and unseparated modules are mixed in a thermal environment, making it difficult to determine their respective heating histories, and thus compromising cleanliness and performance retention. Therefore, the multi-interface combination scheme arranges the activation conditions from low to high, achieving a refined step-by-step breakdown of "easy to difficult, low to high" (refer to...). Figure 5 This allows complex electromagnetic devices containing multiple functional fibers and various interface requirements to obtain mild recycling conditions that are compatible with their materials, significantly expanding the applicability of this structure to multifunctional devices.

[0089] Secondly, referring to Figure 2 As shown, this application provides a method for recycling a three-dimensional braided electromagnetic device, employing a detachable and recyclable three-dimensional braided electromagnetic device structure as described above, comprising the following steps:

[0090] S1: Identify the chemical type of the dissociable interface phase and the pull-off end position of the disassembly guide wire of the three-dimensional braided electromagnetic device to be recycled. Specifically: First, check the appearance and markings, read the material markings reserved on the device end face or the outer packaging substrate 7, and preliminarily determine whether the dissociable interface phase 6 at each interface in the three-dimensional braided electromagnetic device body 1 is a thermally reversible interface phase or a solvent-dissociable interface phase, thereby predicting whether its activation mode is thermal activation or solvent dissociation, and determining the thermal activation temperature Td or the type of dissociation solvent required accordingly; for recycled parts with missing markings, a small amount of interface yarn can be cut from the exposed pull-off end 9, and the chemical type can be verified by differential scanning calorimetry or swelling test. Next, the pulling end 9 is positioned: along the end face of the three-dimensional braided electromagnetic device body 1, the exposed linear ends are located, and each one is identified as either the disassembly guide line 8 or a functional fiber—the diameter of the disassembly guide line 8 is significantly larger than that of a single braided yarn, and its routing is consistent with the extension direction of the interface phase 6. If necessary, the interface segment corresponding to each guide line 8 is confirmed by comparing the end face image with the braided digital model, and each pulling end 9 is numbered and marked to establish a correspondence table between the end, interface, and functional module. Then, the unlocking structure type (press type, rotary type, or pull ring type) and operability of the modular connector 10 are checked, and it is confirmed that there is no rust or jamming between the male and female ends. Finally, based on the above information, a disassembly plan is formulated, clarifying the interface phase 6 to be activated first in the step sequence, the corresponding clamping pulling end 9, and the pulling speed setting, forming the execution basis for steps S2 to S4. This step changes the recycling process from "disassembly based on experience" to "disassembly controlled according to the plan," which is a prerequisite for ensuring the stable propagation of subsequent cracks along the predetermined path.

[0091] S2: Activate the dissociable interface phase according to its chemical type, reducing the interfacial shear strength to less than one-tenth of its pre-activation value. Specifically, for thermally reversible interface phases, heat to their thermal activation temperature Td and hold for 10 to 120 minutes; for solvent-dissociable interface phases, immerse in the corresponding dissociable solvent and hold until the interface phase swells, softens, or dissolves. Specifically: For thermally reversible interface phases, place the entire three-dimensional braided electromagnetic device body 1 into a hot air furnace or oil bath, and set the heating temperature according to the Td determined in S1—in this embodiment, the Td of the thermally reversible interface phase is... The device was moved from room temperature to a temperature not exceeding [a certain value]. The heating rate is increased to Td to avoid excessively rapid heating and thermal stress concentration at the interface. The temperature is then maintained for 10 to 120 minutes (30 minutes in this embodiment) to allow heat to be fully conducted from the surface of the three-dimensional braided electromagnetic device body 1 to the full thickness of the interface phase 6. The Diels-Alder addition bonds within the thermally reversible interface phase undergo a reverse reaction to decrosslink, softening the polymer network and reducing the interfacial shear strength from 12 MPa to 0.3 MPa. After the heat maintenance, the device can proceed directly to S4 without cooling to take advantage of the optimal tearing window when the interface phase 6 is in a low-strength state. For solvent-dissociable interface phases, the corresponding section of the three-dimensional braided electromagnetic device body 1 is immersed in the solution. In the dissociation solvent, the interfacial phase 6 is kept until it swells, softens, or dissolves—taking a water-soluble polyvinyl alcohol system as an example, after soaking for 2 hours, the interfacial shear strength decreases from 10 MPa to 0.2 MPa; during soaking, non-target interfaces are isolated with solvent-resistant tape to prevent accidental activation. The criterion for whether activation is qualified is: when a slight pulling force is applied to the pulling end 9, uniform low-resistance slippage occurs along the entire length of interfacial phase 6 without local hard spots. This step is related to the fact that the upper limit of the operating temperature of the three-dimensional braided electromagnetic device body 1 is at least below Td. This design aligns with the design principles to ensure that the dissociation conditions for this step are never mistakenly triggered during service.

[0092] S3: Separate the male and female ends of the modular connector through the unlocking structure. Specifically: First, confirm that the activation process of S2 has been completed. Then, perform the corresponding operation according to the unlocking structure type identified by S1—for a press-type unlocking structure, apply radial pressure along the end of the three-dimensional braided electromagnetic device body 1, aligning it with the press area on the male or female end. The locking arm of the latch disengages from the slot, and the male and female ends are released from the insertion engagement; for a rotation-type unlocking structure, rotate the male end relative to the female end by a preset angle (usually 100°). ), ), threaded or rotating slot disengagement; for pull ring type unlocking structure, hook the pull ring and pull it out along the insertion axis. After separation, check whether the silver-plated copper or gold-plated copper contacts on the male and female contacts are oxidized or stuck, and classify the separated joints into the corresponding metal and non-metal recycling streams respectively. It should be noted that S3 is arranged after S2 and before S4 in the process sequence. Its function is to: first separate the end constraints so that the two ends of the three-dimensional braided electromagnetic device body 1 are no longer mechanically fixed through the modular joint 10. When pulling and disassembling the guide wire 8, the pulling force is fully applied to the activated low-strength dissociable interface phase 6, and will not be reversed through the end joint to the functional area, causing the functional fibers to be broken; at the same time, the electrical connection between the male and female ends is released first to avoid the arc and contact erosion caused by the electric separation during the tearing process. If the connector is separated before S2, the heat treatment or solvent immersion during the activation stage may enter the connector and damage the contact resistance performance of the contact components. Therefore, the sequence of this process is a necessary condition to ensure that the connector can be reused multiple times, and also enables the complete realization of the disassembly logic of "separating at the module level first and tearing at the interface level later".

[0093] S4: Clamp and pull the end, apply tension along the disassembly guide line at a speed of 0.1 mm / s to 10 mm / s, causing the crack to propagate along the detachable interface phase, separating the three-dimensional braided electromagnetic device body into functional modules. Specifically: First, according to the end-interface correspondence table established in S1, use the clamping device to clamp the pull end 9 corresponding to the target interface one by one. The clamping part should be at least 10 mm away from the end face of the three-dimensional braided electromagnetic device body 1 to avoid the clamping force crushing the end braided structure; then, apply tension along the extension direction of the disassembly guide line 8, that is, roughly parallel to the direction of the detachable interface phase 6, and control the angle between the tension direction and the interface phase 6. Within this range, ensure that the tearing load is transmitted to the crack front via guide line 8 rather than vertically lifting the functional zone fibers. The pulling speed is limited to 0.1 mm / s to 10 mm / s: this embodiment uses 2 mm / s, ensuring the crack front advances stably within the low-strength interface phase 6, with uniform resistance and no jumps during the tearing process—pulling speeds below 0.1 mm / s result in low disassembly efficiency, while speeds above 10 mm / s increase the kinetic energy of the crack front, potentially causing fiber pull-out and rough cross-sections due to penetration into the functional zone. The tension curve is monitored synchronously during the pulling process; a normal state is a low, stable segment. If a sharp increase in force occurs, it indicates that the crack has reached a missing guide segment or that the local interface phase 6 is not sufficiently activated; the machine should be stopped and S2 re-performed before continuing. For multi-interface assemblies, the step-by-step sequence of "solvent first, then heat activation" is executed according to the S1 plan. Each disassembly guide line 8 is pulled out one by one. The three-dimensional braided electromagnetic device body 1 is then neatly separated into functional modules corresponding to the conductive area 2, magnetic control area 3, insulating area 4 and structural area 5 along each dissociable interface phase 6. The cross-section is continuous and flat, and the functional fibers are basically undamaged. Then, they are classified into their respective recycling streams according to the module material.

[0094] S5: The separated functional modules are subjected to at least one of the following processes: cleaning, drying, and untwisting, as well as sorting, to recover conductive fibers, magnetic fibers, insulating fibers, and structural fibers.

[0095] Specifically, the process is as follows: First, based on the disassembly results of S4, each functional module is categorized according to its corresponding zone—the conductive zone 2 module, the magnetic control zone 3 module, the insulation zone 4 module, and the structural zone 5 module are each sent to their respective processing stations. This module-level separation ensures that the material flows do not mix from the source. Then, each module undergoes a sequential processing procedure: cleaning is performed using a medium compatible with the activation method of the module—modules that have undergone solvent dissociation are rinsed with water or alcohol to remove residual dissociation solvent; modules that have undergone thermal activation are cleaned with a low-residue water-based cleaning agent to remove the softened film on the interface phase 6. After cleaning, [the process continues...] Dry to constant weight; untwisting is performed on the twisted fiber bundles, unwinding the functional fiber bundles into parallel fiber states, restoring the initial length and orientation of the fibers, and preparing for respinning or reweaving. Sorting is carried out according to material: the conductive zone 2 module recovers conductive fiber bundles and their plating metal, and if necessary, uses eddy current sorting to separate plating debris; the magnetic control zone 3 module recovers magnetic fibers, and uses their ferromagnetism to use magnetic rollers to remove mixed non-magnetic fibers; the insulation zone 4 and structural zone 5 modules respectively recover insulating fibers and structural fibers, and classify and package them according to fiber type. For devices with external packaging substrate 7, the packaging layer has been peeled off in its entirety along the disintegratable interface phase 6 during disassembly, and is crushed separately and reused as thermoplastic material. Thus, all kinds of functional fibers are recovered in the form of continuous fibers rather than broken mixtures, and the strength retention rate of the recovered fibers is not less than 90%, which can be directly reused in the three-dimensional weaving of new devices, realizing the closed-loop regeneration of "material-device-material", completing the closed loop of the entire recycling method S1 to S5.

[0096] Example 1: Dismantling and recycling of three-dimensional braided power inductors based on thermally reversible DA interface phase

[0097] like Figure 1 and Figure 3 As shown, a three-dimensional braided power inductor device is fabricated. The three-dimensional braided electromagnetic device body 1 includes: a conductive region 2 (12 bundles of silver-plated copper conductive fibers, each bundle containing 19 monofilaments with a diameter of 30μm and a polyimide insulating layer with a thickness of 3μm on the surface of the monofilaments), a magnetron region 3 (ferrite composite magnetic fiber bundles, with a fiber diameter of 150μm and a relative permeability of 80), an insulating region 4 (polyimide insulating fibers), and a structural region 5 (aramid structural fibers).

[0098] A thermally reversible interface phase is provided between the magnetron region 3 and the structural region 5, and another thermally reversible interface phase is provided between the structural region 5 and the outer encapsulation substrate 7 (epoxy resin). The formulation of the thermally reversible interface phase is as follows: furanyl-terminated polyether ester prepolymer (number average molecular weight 5000 g / mol) and bismaleimide crosslinking agent are dissolved in NMP at a furanyl / maleimide molar ratio of 1.0:1.1, with a solid content of 30% and a coating thickness of 100 μm. Thermal crosslinking for 2 hours forms a thermally reversible interfacial phase. This interfacial phase The lower interface shear strength is 12 MPa. After holding for 30 minutes, the pressure was reduced to 0.3 MPa. The disassembled guide wire 8 is made of para-aramid 1414 monofilament, 0.3 mm in diameter, with a tensile strength of 3.0 GPa. Two wires are arranged along the inductor axis, forming pull-out ends 9 at both ends. The modular connector 10 is located at the end of the inductor and is used to connect the lead wire of conductive area 2 to the external circuit. It is made of PEEK, with the male and female ends connected by an elastic snap. The contacts are silver-plated copper, with a contact resistance of 3 mΩ and a tensile shear strength of 15 MPa. Device service testing: Under 100 kHz and 1A conditions, the inductance is 22 μH, and the quality factor is Q58; After 1000 hours of continuous operation, the inductance change was less than 5%, and there was no cracking at the interface.

[0099] Recycling Test: After service, the device is first pressed to unlock the modular connector 10, then placed... The inductor is kept in a hot air circulating oven for 30 minutes. After removal, the end 9 is immediately clamped and pulled out at a speed of 1 mm / s using the disassembly guide wire 8. The outer packaging substrate 7 separates from the structural region 5, the structural region 5 separates from the magnetized region 3, and the conductive region 2 is then gently untangled. The recycling results are as follows: conductive fiber length retention rate 86%, magnetic fiber length retention rate 82%, insulating fiber length retention rate 84%, and structural fiber length retention rate 88%; the purity by function is: conductive fiber 96%, magnetic fiber 95%, insulating fiber 97%, and structural fiber 96%; the DC resistance of the recycled conductive fiber increases by 7% compared to the original fiber, and the relative permeability of the magnetic fiber decreases by 12%. These parameters indicate that this embodiment achieves efficient disassembly and recycling of a three-dimensional braided power inductor.

[0100] Example 2: Dismantling and recycling of three-dimensional braided Litz cables based on solvent-dissociable PVA interfacial phases

[0101] like Figure 1 As shown, a three-dimensional braided Litz cable is prepared. Its three-dimensional braided electromagnetic device body 1 is a four-functional area coaxial structure: the center is the conductive area 2 (8 bundles of silver-plated copper conductive fibers, each bundle has 7 single filaments with a diameter of 25μm), and outward are the insulation area 4 (polyimide insulating fiber), the magnetron control area 3 (carbonyl iron powder / silicone rubber composite magnetic fiber bundle) and the structural area 5 (ultra-high molecular weight polyethylene structural fiber).

[0102] A solvent-dissociable interface phase is provided between the insulating region 4 and the magnetized region 3. This phase is a polyvinyl alcohol (PVA) film with a polymerization degree of 1700 and a degree of hydrolysis of 98%, with a thickness of 80 μm. Hot-press bonding for 10 minutes. The PVA interface... The lower interface shear strength is 10 MPa. After soaking in deionized water for 2 hours, the interfacial shear strength decreased to 0.2 MPa. The disassembly guide wire 8 is made of ultra-high molecular weight polyethylene monofilament, 0.25 mm in diameter, with a tensile strength of 3.2 GPa. Four wires are evenly spaced along the cable axis, and the pull end 9 protrudes 20 mm from both ends of the cable. The modular connector 10 is a pluggable connector at the cable end; the male and female ends are locked together by threads, and the unlocking structure is a rotating unlocking ring.

[0103] Recycling test: Cut a 1m long cable into sections, first rotate the unlocking ring to separate the modular connector 10, then immerse it in... After being immersed in deionized water for 2 hours, the four disassembly guide wires 8 were clamped at their pulling ends 9 and pulled at a speed of 0.5 mm / s. After the PVA interface phase dissolved, the magnetron region 3 separated from the insulating region 4; the conductive region 2 separated from the insulating region 4 through untwisting. The recovery results are as follows: conductive fiber length retention rate 88%, insulating fiber length retention rate 85%, magnetic fiber length retention rate 80%, and structural fiber length retention rate 90%; the purity by function is: conductive fiber 97%, insulating fiber 96%, magnetic fiber 95%, and structural fiber 97%. The recovered conductive fiber bundles were cleaned with anhydrous ethanol... After vacuum drying for 2 hours, the DC resistance increased by 5% compared to the original fiber, making it suitable for direct remanufacturing of low-power inductors.

[0104] Example 3: Disassembly and recycling of a three-dimensional braided motor stator with multiple interface combinations

[0105] like Figure 1 and Figure 5 As shown, a hollow cup-shaped three-dimensional braided motor stator is fabricated. Its three-dimensional braided electromagnetic device body 1 includes: a conductive region 2 (stator winding, 20 bundles of silver-plated copper conductive fibers, each bundle containing 12 monofilaments with a diameter of 40 μm), an insulating region 4 (polyimide insulating fibers), a magnetocontrol region 3 (stator yoke, amorphous soft magnetic composite magnetic fiber bundles), and a structural region 5 (aramid structural fibers). A solvent-dissociable interface phase (PVA film, 60 μm thick) is placed between the conductive region 2 and the insulating region 4; a thermally reversible interface phase (DA polyether ester, 80 μm thick) is placed between the magnetocontrol region 3 and the structural region 5; and a thermally reversible interface phase (EVA hot melt adhesive, softening point...) is placed between the structural region 5 and the outer encapsulation substrate 7 (silicone rubber). (Thickness 120μm). A PVA solvent-based dissociative interface phase is provided between the insulation region 4 and the magnetized region 3, which is then separated by a water bath (if no interface phase is provided, separation is done mechanically). Disassembly guide wires 8 are arranged along the aforementioned interface, a total of 6 wires. Modular connectors 10 are located at the stator end winding leads, a total of 3 sets, and are unlocked using a push-button latch.

[0106] Recycling steps:

[0107] 1. Press to unlock 3 sets of modular connectors 10;

[0108] 2. Immerse the entire stator in The solvent-dissociable interface phase between conductive region 2 and insulating region 4 is softened by 1 hour in deionized water.

[0109] 3. Pull out the corresponding disassembly guide wire 8 to separate the conductive area 2 from the insulating area 4;

[0110] 4. Place the remaining structure in In the oven for 30 minutes, the interface between magnetron region 3 and structural region 5 and the interface between structural region 5 and outer packaging substrate 7 are softened.

[0111] 5. Pull out the remaining disassembly guide wires 8 in sequence to separate the magnetized area 3, the structural area 5, and the outer packaging substrate 7. Recovery results: Conductive fiber length retention rate 84%, magnetic fiber length retention rate 81%, insulating fiber length retention rate 83%, and structural fiber length retention rate 87%; purity by function is not less than 95%. This embodiment demonstrates that by combining thermally reversible and solvent-dissociable interfacial phases, layer-by-layer controllable disassembly can be achieved in complex three-dimensional braided electromagnetic devices.

[0112] Example 4: Validation of Recycled Fiber Reuse

[0113] The conductive fiber bundles, magnetic fiber bundles, insulating fibers, and structural fibers recovered in Example 1 were mixed with 10% new materials at 90% of their original mass ratio and re-woven into a three-dimensional braided power inductor of the same specifications as in Example 1. The process was repeated three times, including disassembly-recycling-reuse cycles. Key performance parameters were tested after each cycle, and the results are shown in Table 1.

[0114] Table 1. Recycling performance retention rate of recovered fibers

[0115]

[0116] The data in Table 1 shows that after three cycles of dismantling-recycling-reuse, the length retention rate of each functional fiber is still no less than 80%, the purity is still no less than 95%, and the inductance retention rate of the device is no less than 93%, proving that the present invention has achieved high-value recycling of three-dimensional braided electromagnetic devices.

[0117] In summary, this invention achieves a dual-state compatibility effect of "robust service and easy recycling" by setting a disintegratable interface phase 6 between the functional areas of the three-dimensional braided electromagnetic device body 1 and weaving disassembly guide lines 8 along it. During service, the interface shear strength reaches 8 MPa to 25 MPa, and after activation, it drops to less than one-tenth of its pre-activation strength, forming an order-of-magnitude strength cliff. Pulling the guide lines 8 allows the three-dimensional braided electromagnetic device body 1 to be neatly separated into functional modules. By using high-strength, high-modulus fibers with a tensile strength of not less than 2 GPa and an elastic modulus of not less than 50 GPa, and with a contact length accounting for 80% to 100% of the interface length, the invention achieves controlled crack propagation throughout the process, preventing penetration into the functional areas. Furthermore, the invention utilizes a thermally reversible interface phase Diels-Alder system and an upper operating temperature limit lower than Td. The margin criterion achieves both service reliability and recycling / activation reliability, and allows for repair after accidental activation; by combining thermally reversible and solvent-dissociable interface phases and using a "solvent first, then thermal activation" sequence, the heat-sensitive module is protected from thermal damage; by first unlocking and separating the modular connector 10, the end constraints are released first, and the connector can be reused; through the S1 to S5 process-oriented method, various functional fibers are continuously recycled at the source with a strength retention rate of no less than 90%, realizing a closed-loop regeneration of "material-device-material".

[0118] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A three-dimensional braided electromagnetic device structure that can be disassembled and recycled, characterized in that, include: The three-dimensional braided electromagnetic device body (1) is integrally woven from at least two functional areas in the same three-dimensional braiding process. Each functional area is distributed along the functional division of the device and interwoven with each other to form a three-dimensional interwoven structure. A dissociable interface phase (6) is disposed at the interface between at least two of the functional areas. The dissociable interface phase (6) is sandwiched between the braiding yarns of two adjacent functional areas, and its two sides are respectively bonded to the fiber surface of the adjacent functional areas, connecting the adjacent functional areas into a whole in the service state. The dissociable interface phase (6) is formed in situ by interface yarns carrying dissociable polymers being braided into the interface position as an independent yarn in the three-dimensional braiding process. Disassembly guide wire (8) is embedded inside the three-dimensional braided electromagnetic device body (1) along the extension direction of the disintegratable interface phase (6), and is covered and fixed by the braided structure and extends together with the disintegratable interface phase (6). The two ends of the disassembly guide wire (8) are exposed on the end face of the three-dimensional braided electromagnetic device body (1) to form pull ends (9); and A modular connector (10) is provided at the end of the three-dimensional braided electromagnetic device body (1) or at the boundary between adjacent functional areas. It includes a pluggable male terminal and a female terminal that are mutually pluggable and a unlocking structure that acts on one of the male terminal and the female terminal. The male terminal and the female terminal maintain electrical connection and mechanical fixation between adjacent functional modules in the service state, and are released from fixation and separated under the action of the unlocking structure. The interfacial shear strength of the dissociable interfacial phase (6) under service conditions is at least one order of magnitude different from its interfacial shear strength under thermal activation conditions or solvent dissociation conditions.

2. The three-dimensional braided electromagnetic device detachable and recyclable structure according to claim 1, characterized in that, The interfacial shear strength of the dissociable interfacial phase (6) under service conditions is not less than 5 MPa, and the interfacial shear strength is reduced to not more than 0.5 MPa under the thermal activation conditions or solvent dissociation conditions.

3. The three-dimensional braided electromagnetic device detachable and recyclable structure according to claim 2, characterized in that, The at least two functional regions are any two or more of the conductive region (2), magnetron region (3), insulation region (4), and structural region (5) distributed along the axial or radial direction of the device. The dissociable interface phase (6) is disposed at least once between the conductive region (2) and the magnetron region (3), between the magnetron region (3) and the insulation region (4), and between the insulation region (4) and the structural region (5). Alternatively, the removable and recyclable structure further includes an outer packaging substrate (7) covering the outside of the three-dimensional braided electromagnetic device body (1), and the dissociable interface phase (6) is sandwiched between the outer surface of the three-dimensional braided electromagnetic device body (1) and the inner surface of the outer packaging substrate (7).

4. The three-dimensional braided electromagnetic device detachable and recyclable structure according to claim 1, characterized in that, The interface yarn carrying the dissociable polymer is either a fiber yarn coated with a dissociable polymer coating or the dissociable polymer fiber itself; after being knitted into the interface position, it is then... The heat treatment or curing conditions of the selected dissociable polymer system are used to melt, flow and solidify the dissociable polymer at the interface to form a continuous dissociable interface phase (6); the thickness of the dissociable interface phase (6) is 10 μm to 500 μm and the volume fraction is 0.5% to 10% of the total volume of the three-dimensional braided electromagnetic device body (1).

5. The three-dimensional braided electromagnetic device detachable and recyclable structure according to claim 2, characterized in that, The dissociable interface phase (6) is a thermally reversible interface phase, and its thermal activation temperature Td is... Under these conditions, after being maintained for 10 to 120 minutes, the interfacial shear strength decreased to no higher than The lower interfacial shear strength is 8 MPa to 25 MPa; the upper limit of the operating temperature of the three-dimensional braided electromagnetic device body (1) is at least 20°C lower than the thermal activation temperature Td; the thermally reversible interfacial phase is a polymer network based on Diels-Alder reversible addition products, formed by the reaction of furan-terminated prepolymer and maleimide-terminated crosslinking agent, with a molar ratio of furan groups to maleimide groups of [missing information]. The number-average molecular weight of the prepolymer is Alternatively, it can be a polymer network based on thermally reversible urethane, urea, ester, or disulfide bonds; or it can be a polymer network with a softening temperature of... The hot-melt thermoplastic adhesive is an ethylene-vinyl acetate copolymer, polyamide, or polyester copolymer.

6. The three-dimensional braided electromagnetic device detachable and recyclable structure according to claim 2, characterized in that, The dissociable interface phase (6) is a solvent-dissociable interface phase, in which the solvent dissociates at... After 10 minutes to 24 hours of exposure, the interfacial shear strength decreases to no higher than The lower interfacial shear strength is 8 MPa to 20 MPa; the dissociation solvent is at least one of deionized water, an ethanol-water mixture, dimethyl sulfoxide, N,N-dimethylformamide, N-methylpyrrolidone, γ-butyrolactone, dichloromethane, or acetone; the material of the solvent-dissociable interfacial phase is polyvinyl alcohol, polyethylene oxide, polyvinylpyrrolidone, water-soluble copolyester, polylactic acid, polycaprolactone, or thermoplastic polyurethane, with a thickness of 20 μm to 500 μm.

7. The three-dimensional braided electromagnetic device detachable and recyclable structure according to claim 1, characterized in that, The disassembly guide line (8) is made of aramid fiber, ultra-high molecular weight polyethylene fiber, poly(p-phenylene benzodioxazole) fiber, glass fiber or basalt fiber, with a single filament diameter or equivalent diameter of 0.1 mm to 1.0 mm, a tensile strength of not less than 2 GPa, and an elastic modulus of not less than 50 GPa; the number of disassembly guide lines (8) set within each 100 mm device length is 1 to 8; the contact length between the disassembly guide line (8) and the disintegratable interface phase (6) accounts for 80% to 100% of the interface length.

8. The three-dimensional braided electromagnetic device detachable and recyclable structure according to claim 1, characterized in that, The male and female ends of the modular connector (10) are connected by snap, thread or magnetic adsorption to achieve the plug-in engagement. The unlocking structure is a press type, a rotation type or a pull ring type. The contact resistance between the male and female ends in service is not greater than 5mΩ and the tensile shear strength is not less than 10MPa. The modular connector (10) is made of polyetheretherketone, polyphenylene sulfide, polyimide or glass fiber reinforced nylon, and the contact parts are silver-plated copper or gold-plated copper.

9. The three-dimensional braided electromagnetic device detachable and recyclable structure according to claim 1, characterized in that, The thermally reversible interface phase and the solvent-dissociable interface phase are respectively set at different interfaces of the same three-dimensional braided electromagnetic device body (1); during recycling, the solvent-dissociable interface phase is first solvent-dissociated and the corresponding disassembly guide line (8) is pulled out to separate the corresponding functional modules, and then the thermally reversible interface phase is thermally activated and the remaining disassembly guide line (8) is pulled out to separate the remaining functional modules.

10. A method for recycling a three-dimensional braided electromagnetic device, employing the detachable and recyclable structure of the three-dimensional braided electromagnetic device as described in any one of claims 1 to 9, characterized in that, Includes the following steps: S1: Identify the chemical type of the dissociable interface phase (6) of the three-dimensional braided electromagnetic device to be recycled and the position of the pull end (9) of the disassembly guide wire (8); S2: Activate the dissociable interface phase (6) according to the chemical type, so that the interfacial shear strength is reduced to less than one-tenth of that before activation; wherein, for thermally reversible interface phases, heat to its thermal activation temperature Td and hold for 10 min to 120 min; for solvent-dissociable interface phases, immerse in the corresponding dissociable solvent and hold until the interface phase swells, softens or dissolves. S3: Separate the male and female ends of the modular connector (10) through the unlocking structure; S4: Clamp the pulling end (9) and apply a pulling force along the disassembly guide line (8) at a speed of 0.1 mm / s to 10 mm / s to make the crack extend along the disintegratable interface phase (6) and separate the three-dimensional braided electromagnetic device body (1) into functional modules; S5: The separated functional modules are subjected to at least one of the following processes: cleaning, drying, and untwisting, as well as sorting, to recover conductive fibers, magnetic fibers, insulating fibers, and structural fibers.

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