A spider-silk-structure-mimicking fog-collecting thermoformed braided thread and a method of making the same

Abstract

The application relates to a spider-silk-structure fog-collecting thermoforming braided wire and a preparation method thereof, and belongs to the technical field of structural bionic textile materials. The spider-silk-structure fog-collecting thermoforming braided wire comprises a core layer and a shell layer, the shell layer is formed on the outer periphery of the core layer, the core layer comprises first yarn, the material of the first yarn comprises at least one of polyethylene fiber, aramid fiber PPTA and carbon fiber, the shell layer comprises third yarn and a protrusion, the protrusion is formed on the outer periphery of the third yarn, the material of the third yarn comprises one of thermoplastic polyurethane fiber TPU, low-melting-point polyester fiber PET and polyamide yarn fiber PA, and the material of the protrusion comprises one of thermoplastic polyurethane fiber TPU, low-melting-point polyester fiber PET and polyamide yarn fiber PA; along the length direction of the spider-silk-structure fog-collecting thermoforming braided wire, a plurality of protrusions are distributed on the surface of the spider-silk-structure fog-collecting thermoforming braided wire. The application can realize the integration of water-collecting performance and mechanical toughness, and has wide market prospects and application value.

Description

Technical Field

[0001] The present invention belongs to the technical field of structural bionic textile materials, and specifically relates to a spider silk-like structure fog collection thermoformed braided wire and a preparation method thereof. Background Art

[0002] Freshwater shortages have become a global issue. Fog harvesting is considered a highly promising low-cost water collection mechanism. Effectively utilizing airborne water mist is a crucial research topic. Research has shown that spider silk possesses a core-shell structure, with the core providing the primary mechanical properties and its strength and toughness derived from its layered structure. The combined effects of primary and secondary structures—spidroin proteins, nanofibrils, "core-shell," and "nanofishing net" structures—result in high mechanical energy dissipation. The shell layer provides functional properties, such as excellent water collection and adhesion. The micro- and nanoscale assembly of the spider silk surface creates a periodic arrangement of spindle structures and interspersed hydrophilic and hydrophobic regions, generating a surface energy gradient. The varying curvatures create a Laplace pressure difference, where mist condenses and moves in a directional manner, enabling continuous condensation and collection. Inspired by this spider silk structure, the preparation of efficient fog harvesting functional materials that mimic spider silk has become a research hotspot.

[0003] At present, research on bionic spider-like fibers with fog-harvesting functions has made great progress. Methods for preparing bionic spider-like fibers with fog-harvesting functions include dip coating, electrospinning, microfluidics, and 3D printing. However, due to the Rayleigh instability principle, electrostatic forces, surface tension, and shear forces, the surface heterogeneous structure of composite fibers is constructed through solvent evaporation, polymer diffusion, and phase separation. This has led to the formation of various structural polymer micro-nanofibers, including periodic multi-gradient spindle-knot connection fibers, thick spindle-knot fibers, beaded ultrafine fibers, micro-hump fibers, and asymmetric concave-convex fibers, to achieve water collection effects based on surface energy gradients and pressure differences. However, most of these methods ignore the strength and toughness of the fibers. Of course, progress has also been made in the preparation of high-strength and tough artificial spider silk. Non-recombinant proteins, recombinant proteins, peptides, synthetic polymers and polymer nanocomposites can be used, and different types of spinning methods can be adopted, including draw spinning, wet spinning, microfluidic spinning, post-drawing and dynamic cross-linking, so that the hierarchical structure of the fiber is subtly regulated during the drying process, such as arrangement, phase separation, self-assembly, post-drawing and twisting, thereby producing various fiber materials with high strength and toughness. This method involves a very complex physical and chemical system, which is easily affected by the kinetics and thermodynamic parameters of solvent volatilization and phase separation, and it is difficult to achieve programmed precise design and construction of multi-scale micro-nano assembly structures. However, Chinese patent CN113403697A discloses a programmable spider silk-like fiber and a preparation method thereof. It utilizes a piezoelectric microfluidic platform to customize the piezoelectric signal to control the morphology of the jet, and uses ultraviolet light to solidify the jet template to maintain the morphology, thereby obtaining a spider silk-like fiber with programmable spacing and section height. Although the morphology of the spider silk-like fiber can be adjusted and controlled, the preparation process is relatively cumbersome.

[0004] Therefore, the controllable design and precise preparation of spider silk-like fog collection fibers to achieve the water collection performance and / or mechanical toughness of spider silk-like fog collection fibers are technical problems that urgently need to be solved in the field of spider silk-like fog collection fibers. Summary of the Invention

[0005] This invention proposes a spider silk-like mist collection thermoformed braided wire and its preparation method, aiming to partially or completely solve the technical problems existing in the prior art spider silk-like mist collection fiber materials. The technical solutions of this invention are as follows:

[0006] In a first aspect, a spider silk-like structure mist collection thermoformed braided wire comprises: a core layer and a shell layer, the shell layer is formed on the periphery of the core layer, the core layer comprises a first yarn, the material of the first yarn comprises at least one of polyethylene fiber, aramid fiber PPTA and carbon fiber, the shell layer comprises a third yarn and a protrusion, the protrusion is formed on the periphery of the third yarn, the material of the third yarn comprises one of thermoplastic polyurethane fiber TPU, low-melting point polyester fiber PET, and polyamide yarn fiber PA, the material of the protrusion comprises one of thermoplastic polyurethane fiber TPU, low-melting point polyester fiber PET, and polyamide yarn fiber PA; along the length direction of the spider silk-like structure mist collection thermoformed braided wire, a plurality of protrusions are distributed on the surface of the spider silk-like structure mist collection thermoformed braided wire.

[0007] Optionally, a connecting portion is formed between two adjacent protrusions, the connecting portion connects the third yarn and the first yarn, and the connecting portion connects two adjacent protrusions; and / or, the material of the first yarn is aramid fiber PPTA, the material of the third yarn includes polyamide yarn fiber PA, and the material of the protrusion includes thermoplastic polyurethane fiber TPU.

[0008] In a second aspect, a method for preparing a spider silk-like mist collection thermoformed braided wire is provided, wherein the method comprises:

[0009] Step S100: Setting parameters of the first yarn, the second yarn, and the third yarn. The parameters of the first yarn include the material of the first yarn and the diameter of the first yarn; the parameters of the second yarn include the material of the second yarn, the diameter of the second yarn, and the number of strands Q of the second yarn; and the parameters of the third yarn include the material of the second yarn, the diameter of the third yarn, and the number of strands Y of the third yarn.

[0010] Step S200: The first yarn is used as the core yarn, and the second yarn and the third yarn are used as the shell yarns. The first yarn, the second yarn and the third yarn are mixed and knitted. The second yarn and the third yarn are formed on the periphery of the first yarn to obtain a braided yarn.

[0011] Step S300: The braided wire is introduced into a heating mechanism, and the heating mechanism heats the braided wire at a set temperature or a set temperature range. After the set heating time, the heated braided wire leaves the heating mechanism and is cooled at room temperature to obtain a spider silk-like mist-collecting thermoformed braided wire.

[0012] Optionally, step S100 includes:

[0013] Step S101: Setting parameters of a first yarn, the parameters of the first yarn including the material of the first yarn and the diameter of the first yarn, the material of the first yarn including at least one of polyethylene fiber, aramid fiber PPTA and carbon fiber; the diameter of the first yarn is 600D-1800D;

[0014] Step S102: Setting parameters of the second yarn, the parameters of the second yarn include the material of the second yarn, the diameter of the second yarn, and the number of strands Q of the second yarn; the material of the second yarn includes one of thermoplastic polyurethane fiber TPU, low-melting point polyester fiber PET, and polyamide yarn fiber PA, and the diameter of the second yarn is 50D-300D;

[0015] Step S103: Set the parameters of the third yarn, which include the material of the second yarn, the diameter of the third yarn, and the number of strands of the third yarn Y; the material of the third yarn includes one of thermoplastic polyurethane fiber TPU, low-melting point polyester fiber PET, and polyamide yarn fiber PA; the diameter of the second yarn is 50D-300D.

[0016] Optionally, step S200 includes:

[0017] Step S201: a first yarn feeding mechanism feeds a first yarn, Q second yarn feeding mechanisms are provided, each second yarn feeding mechanism feeds a second yarn, and Y third yarn feeding mechanisms are provided, each third yarn feeding mechanism feeds a third yarn;

[0018] Step S202: The first yarn is used as the core yarn, the second yarn and the third yarn are used as the shell yarn, the weaving pitch is 1-8 mm, the weaving speed is 800 r / min-1500 r / min, the weaving pattern is one-on-one, the first yarn, the second yarn and the third yarn are mixed and the second yarn and the third yarn are formed on the periphery of the first yarn to obtain the woven yarn.

[0019] Optionally, the second yarn strand number Q and the third yarn strand number Y satisfy: Q+Y=QY, where QY is a preset strand number.

[0020] Optionally, the preset number of strands QY is 8, the braiding pitch is 2 mm or 3 mm, the braiding speed is 800 r / min or 1000 r / min, the set temperature of the heating mechanism is 50° C.-200° C., and the set time is 5s-120s.

[0021] Optionally, the material of the first yarn is aramid fiber PPTA, the material of the second yarn includes thermoplastic polyurethane fiber TPU, the third yarn includes polyamide yarn fiber PA, and the width w of the protrusion, the height h of the protrusion, and the diameter D of the braided wire meet the following conditions:

[0022]

[0023] Among them, w is the width of a protrusion when projected vertically downward along the direction of the central axis of the spider silk structure mist collection thermoformed braided wire; h is the height of the protrusion along the cross-sectional direction of the spider silk structure mist collection thermoformed braided wire; and D is the diameter of the braided wire.

[0024] The beneficial effects achieved by the present invention are as follows:

[0025] (1) In the present application, when the material of the first yarn is aramid fiber PPTA, the material of the second yarn includes thermoplastic polyurethane fiber TPU, and the third yarn includes polyamide yarn fiber PA, the protrusions and the connecting parts both include thermoplastic polyurethane fiber TPU, the thermoplastic polyurethane fiber TPU is superhydrophobic, and the polyamide yarn fiber PA of the third yarn between adjacent protrusions is superhydrophilic. Based on the difference in hydrophilicity and hydrophobicity between the protrusions and the third yarn, the Laplace pressure difference formed due to the periodic arrangement of the protrusions enables the braided wire to have the function of fog collection; at the same time, the diameter D of the braided wire can be set, and the width and height of the protrusions can be set according to the above formula. Along the length direction of the spider silk structure fog collection thermoforming braided wire, a plurality of protrusions are distributed on the surface of the spider silk structure fog collection thermoforming braided wire, realizing the customized setting of the surface structure of the spider silk structure fog collection thermoforming braided wire, and the arrangement and size of multiple protrusions can realize different fog collection capabilities of the spider silk structure fog collection thermoforming braided wire; the aramid fiber PPTA provides the spider silk structure fog collection thermoforming braided wire with sufficient tensile strength and durability, and then the spider silk structure fog collection thermoforming braided wire achieves the consideration and integration of water collection performance and mechanical toughness, and the spider silk structure fog collection thermoforming braided wire has broad market prospects and application value.

[0026] (2) In the present application, the strength, toughness and durability of the obtained braided wire are ensured by reasonable yarn selection and precise multiple yarn feeding mechanisms of the spider silk structure mist collection thermoforming braided wire preparation device, appropriate braiding pitch, braiding speed, braiding pattern and mixed braiding setting. The heating mechanism heats the braided wire at a set temperature or a set temperature range. After heating for a set time, the heated braided wire is cooled at room temperature to obtain a spider silk structure mist collection thermoforming braided wire. The surface of the spider silk structure mist collection thermoforming braided wire is distributed with multiple protrusions, which realizes the customized setting of the surface structure of the spider silk structure mist collection thermoforming braided wire, and also realizes the high customization and scale of the preparation process of the spider silk structure mist collection thermoforming braided wire, providing a flexible and efficient preparation solution for the needs of different spider silk structure mist collection thermoforming braided wires. Moreover, the preparation process of the spider silk structure mist collection thermoforming braided wire is a green process, which will not cause physical and chemical pollution to the environment and has good ecological environmental friendliness. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 This is a schematic structural diagram of the spider silk-like mist collection thermoformed braided wire applied for in the present invention.

[0029] Figure 2 This is a schematic diagram of the cross-sectional structure of the spider silk-like mist collection thermoformed braided wire applied for in the present invention.

[0030] Figure 3 This is a schematic flow chart of a method for preparing a spider silk-like mist collection thermoformed braided wire applied for by the present invention.

[0031] Figure 4 This is a schematic structural diagram of the device for preparing the spider silk-like structure mist-collecting thermoformed braided wire applied for in the present invention.

[0032] Figure 5 This is a schematic structural diagram of the surface of the braided wire applied for in the present invention.

[0033] Figure 6 This is a schematic diagram of the cross-sectional structure of the surface of the braided wire applied for in the present invention.

[0034] Figure 7 This is a simplified structural diagram of the braided wire according to the present invention.

[0035] Figure 8 This is a schematic diagram of the Pythagorean theorem on the surface of the braided wire applied for by the present invention.

[0036] Figure 9 This is a schematic structural diagram of the second exposed portion and protrusion of the present invention.

[0037] Figure 10 This is a schematic diagram of the DSC curves of the aramid fiber PPTA, thermoplastic polyurethane fiber TPU, and polyamide yarn fiber PA applied for in the present invention.

[0038] Figure 11 This is a schematic diagram of the infrared curves of the aramid fiber PPTA, thermoplastic polyurethane fiber TPU, and polyamide yarn fiber PA applied for in the present invention.

[0039] Figure 12 This is a schematic diagram of the water contact angle diagrams of the aramid fiber PPTA, thermoplastic polyurethane fiber TPU, and polyamide yarn fiber PA applied for in the present invention.

[0040] Figure 13 This is a comparison chart of the fog collection effects of the spider silk-like mist collection thermoformed braided wire applied for by the present invention and the existing PPTA braided wire;

[0041] Figure 14 Schematic diagram comparing the fog collection effects of the spider silk-like structure fog-collecting thermoformed braided wire A of Example 1, the spider silk-like structure fog-collecting thermoformed braided wire B of Example 2, and the spider silk-like structure fog-collecting thermoformed braided wire C of Example 3.

[0042] Figure 15 This is a schematic diagram comparing the tensile fracture stress-strain curves of the spider silk structure mist collection thermoformed braided wire C before and after heat treatment of Example 3 of the present invention, the tensile fracture stress-strain curves of the spider silk structure mist collection thermoformed braided wire D before and after heat treatment of Example 4, and the tensile fracture stress-strain curves of the spider silk structure mist collection thermoformed braided wire E before and after heat treatment of Example 5.

[0043] Figure 16 Schematic diagram comparing the wear resistance of the spider silk structure mist collection thermoformed braided wire A of Example 1, the wear resistance of the spider silk structure mist collection thermoformed braided wire B of Example 2, and the wear resistance of the spider silk structure mist collection thermoformed braided wire C of Example 3.

[0044] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. DETAILED DESCRIPTION

[0045] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments; based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0046] In the description of the present invention application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention application. "Including" can at least be understood as meaning only including, and the terms "first", "second", and "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second", and "third" may explicitly or implicitly include one or more of the features. In the description of the present invention application specification, "multiple" means two or more.

[0047] In order to make the purpose, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0048] Description of Spider Silk Structure Mist Collection Thermoformed Braided Wire

[0049] like Figure 1 、 Figure 2 As shown, the first aspect includes: a core layer and a shell layer, the shell layer is formed on the periphery of the core layer, the core layer includes a first yarn 10, the material of the first yarn 10 includes at least one of polyethylene fiber, aramid fiber PPTA and carbon fiber, the shell layer includes a third yarn 20 and a protrusion 30, the protrusion 30 is formed on the periphery of the third yarn 20, the material of the third yarn 20 includes one of thermoplastic polyurethane fiber TPU, low-melting point polyester fiber PET, and polyamide yarn fiber PA, and the material of the protrusion includes one of thermoplastic polyurethane fiber TPU, low-melting point polyester fiber PET, and polyamide yarn fiber PA; along the length direction of the spider silk structure mist collection thermoforming braided wire, a plurality of protrusions 30 are distributed on the surface of the spider silk structure mist collection thermoforming braided wire.

[0050] In some embodiments, the core layer includes a first yarn, and the material of the first yarn includes at least one of polyethylene fiber, aramid fiber PPTA and carbon fiber. Polyethylene fiber has extremely high strength and rigidity, and its strength is higher than that of steel, but it is extremely light and has excellent impact resistance and wear resistance. Polyethylene fiber also excels in corrosion resistance and can be used for a long time in harsh environments; aramid fiber PPTA has extremely high tensile strength and heat resistance, can maintain its physical properties in high temperature environments, and has strong tensile and tear resistance. Aramid fiber also has good flexibility and can provide comfort and flexibility. PPTA fiber is widely used in protective equipment, aerospace, and automotive industries; carbon fiber is known for its excellent strength, rigidity and light weight, low density, high strength, excellent bending resistance and tensile strength, which can effectively improve the performance and durability of the product. At the same time, its high temperature resistance and corrosion resistance also make it used in many high-end fields.

[0051] In some embodiments, the shell layer includes a third yarn and a protrusion, the protrusion is formed on the periphery of the third yarn, the material of the third yarn includes one of thermoplastic polyurethane fiber TPU, low-melting point polyester fiber PET, and polyamide yarn fiber PA, and the material of the protrusion includes one of thermoplastic polyurethane fiber TPU, low-melting point polyester fiber PET, and polyamide yarn fiber PA. Thermoplastic polyurethane fiber (TPU) is a high-performance elastomeric material with excellent wear resistance, oil resistance and chemical corrosion resistance; low-melting point polyester fiber (PET) is a widely used synthetic fiber with high mechanical strength, heat resistance and good processability. PET fiber has relatively good moisture absorption, is comfortable to wear, and has good air permeability. PET fiber can be easily dyed and can be woven or knitted in a variety of ways to meet production processes with different needs. It is widely used in clothing and home textile products; polyamide yarn fiber PA is a synthetic fiber with excellent comprehensive properties. It has extremely high tensile strength, tear resistance and good wear resistance. PA fiber has good moisture absorption, is comfortable to wear, and has good air permeability in warm climates. It is widely used in textile, industrial and automotive fields.

[0052] In some embodiments, the protrusions and the third yarn form a difference in hydrophilicity and hydrophobicity. For example, the protrusions can be hydrophilic and the third yarn can be hydrophobic; alternatively, the protrusions can be hydrophobic and the third yarn can be hydrophilic. In some embodiments, the material of the protrusions 30 includes one of thermoplastic polyurethane fibers (TPU) and low-melting polyester fibers (PET), and the material of the third yarn 20 correspondingly includes polyamide yarn fibers (PA); alternatively, the material of the third yarn 20 includes one of thermoplastic polyurethane fibers (TPU) and low-melting polyester fibers (PET), and the material of the protrusions 30 correspondingly includes polyamide yarn fibers (PA).

[0053] In the spider silk structure fog collection thermoformed braided wire applied for by the present invention, the spider silk structure fog collection thermoformed braided wire includes a core layer and a shell layer. The core layer can generally include a first yarn. The first yarn (such as aramid fiber, carbon fiber, etc.) can provide sufficient structural support to ensure that the braided wire is not easy to break or deform during use. The material of the core layer can effectively improve the tensile strength and durability of the spider silk structure fog collection thermoformed braided wire, and is suitable for application scenarios that need to withstand large tensile forces. The core layer material can also generally have lightweight properties, so that the spider silk structure braided wire can maintain a lower overall mass, facilitate transportation and installation, and improve utilization efficiency; the shell layer generally includes a combination of a third yarn and protrusions. The shell layer can have properties such as wear resistance and UV resistance, and can adapt to usage requirements in harsh environments. , to prevent the external climate from affecting its performance; the shell surface may include protrusions, the protrusions may be micron-sized structures, the micron-sized structures may have an extremely high surface area, and may effectively promote the water droplets to gather on the surface of the spider silk-like structure mist collection thermoformed braided wire, along the length direction of the spider silk-like structure mist collection thermoformed braided wire, a plurality of protrusions are distributed on the surface of the braided wire, and at the same time, along the cross-sectional direction of the spider silk-like structure mist collection thermoformed braided wire, a plurality of protrusions are also distributed on the periphery of the braided wire surface, and the plurality of protrusions can imitate the arrangement of spider silk, thereby improving the efficiency of fog collection, so that the spider silk-like structure mist collection thermoformed braided wire can achieve both water collection performance and mechanical toughness. The shell layer is formed on the periphery of the core layer, which further helps to improve the overall strength and service life of the spider silk-like structure mist collection thermoformed braided wire.

[0054] Optionally, a connecting portion 40 is formed between two adjacent protrusions, the connecting portion 40 connects the third yarn 20 and the first yarn 10, and the connecting portion connects two adjacent protrusions 30; and / or, the material of the first yarn 10 is aramid fiber PPTA, the material of the third yarn 20 includes polyamide yarn fiber PA, and the materials of the connecting portion and the protrusion both include thermoplastic polyurethane fiber TPU.

[0055] In the application of the present invention, first, along the length direction of the braided wire, a plurality of protrusions can be distributed on the surface of the braided wire, and a connecting portion 40 is formed between two adjacent protrusions. The connecting portion 40 connects the third yarn and the first yarn, and the connecting portion connects two adjacent protrusions. The material of the connecting portion also includes one of thermoplastic polyurethane fiber TPU, low-melting point polyester fiber PET, and polyamide yarn fiber PA. At the same time, along the cross-sectional direction of the spider silk structure fog collection thermoforming braided wire, a plurality of connecting portions are also distributed on the periphery of the braided wire, and the surface structure of the spider silk structure fog collection thermoforming braided wire can be customized. The arrangement and size of the plurality of protrusions can achieve different fog collection capabilities of the spider silk structure fog collection thermoforming braided wire; in addition, when the material of the first yarn is aramid fiber PPTA, the material of the third yarn 20 includes polyamide yarn fiber PA, and the materials of the connecting portion and the protrusion both include thermoplastic polyurethane fiber TPU, the protrusion and the connecting portion both include thermoplastic polyurethane fiber TPU, and the thermoplastic polyurethane fiber TPU is super hydrophobic, and the polyamide yarn fiber PA of the third yarn between adjacent protrusions is super hydrophilic. Based on the difference in hydrophilicity and hydrophobicity between the protrusions and the third yarn, the Laplace pressure difference formed by the periodic arrangement of the protrusions gives the braided wire the function of fog collection; in addition, the aramid fiber PPTA provides sufficient tensile strength and durability for the spider silk structure fog collection thermoformed braided wire, and thus the spider silk structure fog collection thermoformed braided wire achieves the balance and integration of water collection performance and mechanical toughness. The spider silk structure fog collection thermoformed braided wire has broad market prospects and application value.

[0056] Description of the preparation method of the thermoformed braided wire for fog collection with spider silk-like structure

[0057] like Figure 3 As shown, in the second aspect, a method for preparing a spider silk-like structure mist collection thermoformed braided wire, preparing any one of the spider silk-like structure mist collection thermoformed braided wires described in the first aspect, comprising:

[0058] Step S100: Setting parameters of the first yarn, the second yarn, and the third yarn. The parameters of the first yarn include the material of the first yarn and the diameter of the first yarn; the parameters of the second yarn include the material of the second yarn, the diameter of the second yarn, and the number of strands Q of the second yarn; and the parameters of the third yarn include the material of the second yarn, the diameter of the third yarn, and the number of strands Y of the third yarn.

[0059] Specifically, step S100 includes:

[0060] Step S101: Setting parameters of a first yarn, the parameters of the first yarn including the material of the first yarn and the diameter of the first yarn, the material of the first yarn including at least one of polyethylene fiber, aramid fiber PPTA and carbon fiber; the diameter of the first yarn is 600D-1800D;

[0061] Step S102: Setting parameters of the second yarn, the parameters of the second yarn include the material of the second yarn, the diameter of the second yarn, and the number of strands Q of the second yarn; the material of the second yarn includes one of thermoplastic polyurethane fiber TPU, low-melting point polyester fiber PET, and polyamide yarn fiber PA, and the diameter of the second yarn is 50D-300D;

[0062] Step S103: Set the parameters of the third yarn, which include the material of the second yarn, the diameter of the third yarn, and the number of strands of the third yarn Y; the material of the third yarn includes one of thermoplastic polyurethane fiber TPU, low-melting point polyester fiber PET, and polyamide yarn fiber PA; the diameter of the second yarn is 50D-300D.

[0063] In some embodiments, in step S101, the material of the first yarn is selected from at least one of polyethylene fiber, aramid fiber PPTA, and carbon fiber. Polyethylene fiber, aramid fiber PPTA, and carbon fiber all have excellent strength and durability, and can enhance the carrying capacity of the braided wire, so that it can still maintain good stability under high-intensity tension and friction environments. In particular, aramid fiber PPTA and carbon fiber can significantly improve the tensile strength and tear resistance of the spider silk structure fog collection thermoformed braided wire; by setting the diameter of the first yarn to 600D-1800D, the thickness and strength of the spider silk structure fog collection thermoformed braided wire can be accurately controlled to adapt to different application requirements.

[0064] In some embodiments, first, in step S102 and step S103, the material of the second yarn material and the material of the third yarn material are selected from at least one of thermoplastic polyurethane fiber TPU, low melting point polyester fiber PET, and polyamide yarn fiber PA. Thermoplastic polyurethane fiber TPU, low melting point polyester fiber PET, and polyamide yarn fiber PA can maintain strength while also having good flexibility, hygroscopicity, air permeability, and thermal processing performance; in addition, the setting of the second yarn strand number Q and the third yarn strand number Y determines the structural tightness and strength of the spider silk structure fog collection thermoforming braided wire, which can be obtained by setting the second yarn strand number Q and the third yarn strand number Y. The combination of the number of strands Q and the number of strands Y of the third yarn improves the flexibility and tensile strength of the yarn, and can also increase the wear resistance and tear resistance of the spider silk structure fog collection thermoforming braided wire; at the same time, the diameter of the second yarn and the diameter of the third yarn are both in the range of 50D-300D. By setting the combination of the diameter of the second yarn and the diameter of the third yarn, the spider silk structure fog collection thermoforming braided wire can have good softness and fog capture ability, meet the requirements of strength, flexibility, durability, wear resistance, temperature resistance and other performances in different application scenarios, and obtain a spider silk structure fog collection thermoforming braided wire that takes into account water collection and wear resistance and tear resistance.

[0065] In some embodiments, the protrusions and the third yarn form a difference in hydrophilicity and hydrophobicity. For example, the protrusions can be hydrophilic and the third yarn can be hydrophobic; alternatively, the protrusions can be hydrophobic and the third yarn can be hydrophilic. In some embodiments, the material of the protrusions 30 includes one of thermoplastic polyurethane fibers (TPU) and low-melting polyester fibers (PET), and the material of the third yarn 20 correspondingly includes polyamide yarn fibers (PA); alternatively, the material of the third yarn 20 includes one of thermoplastic polyurethane fibers (TPU) and low-melting polyester fibers (PET), and the material of the protrusions 30 correspondingly includes polyamide yarn fibers (PA).

[0066] Step S200: The first yarn is used as the core yarn, and the second yarn and the third yarn are used as the shell yarns. The first yarn, the second yarn and the third yarn are mixed and knitted. The second yarn and the third yarn are formed on the periphery of the first yarn to obtain a braided yarn.

[0067] Specifically, step S200 includes:

[0068] Step S201: a first yarn feeding mechanism feeds a first yarn, Q second yarn feeding mechanisms are provided, each second yarn feeding mechanism feeds a second yarn, and Y third yarn feeding mechanisms are provided, each third yarn feeding mechanism feeds a third yarn;

[0069] Step S202: The first yarn is used as the core yarn, the second yarn and the third yarn are used as the shell yarn, the weaving pitch is 1-8 mm, the weaving speed is 800 r / min-1500 r / min, the weaving pattern is one-on-one, the first yarn, the second yarn and the third yarn are mixed and the second yarn and the third yarn are formed on the periphery of the first yarn to obtain the woven yarn.

[0070] Step S300: The braided wire is introduced into a heating mechanism, and the heating mechanism heats the braided wire at a set temperature or a set temperature range. After the set heating time, the heated braided wire leaves the heating mechanism and is cooled at room temperature to obtain a spider silk-like mist-collecting thermoformed braided wire.

[0071] In some embodiments, as Figure 3As shown, the method for preparing a spider silk structure mist collection thermoforming braided wire includes a spider silk structure mist collection thermoforming braided wire preparation device, and the spider silk structure mist collection thermoforming braided wire preparation device 1000 includes: a first yarn feeding mechanism 1001, Q second yarn feeding mechanisms 1002, Y third yarn feeding mechanisms 1003, a weaving mechanism 1004, a pulling mechanism 1005, a winding mechanism 1006, a heating mechanism 1007 and a collecting mechanism 1008, and the weaving mechanism drives the Q second yarn feeding mechanisms and the Y third yarn feeding mechanisms to rotate. The first yarn feeding mechanism, Q second yarn feeding mechanisms, and Y third yarn feeding mechanisms feed the first yarn, the second yarn, and the third yarn respectively. The weaving mechanism uses the first yarn as the core yarn, the second yarn and the third yarn as the shell yarn. The weaving pitch is 1-8mm, the weaving speed is 800r / min-1500r / min, the weaving pattern is one-on-one, the first yarn, the second yarn, and the third yarn are mixed and woven, and the second yarn and the third yarn are formed on the periphery of the first yarn to obtain the weaving yarn.

[0072] Therefore, when the first yarn is unwound from the first yarn feeding mechanism, the unwound first yarn, the second yarn and the third yarn are mixed and woven to form a braided yarn, and the braided yarn passes through the pulling mechanism, the winding mechanism and the heating mechanism in turn and enters the collecting mechanism. The pulling mechanism pulls the braided yarn, and the winding mechanism drives the braided yarn into the heating mechanism; the braided yarn heated by the heating mechanism is cooled at room temperature, and the collecting mechanism performs a corresponding winding operation through the winding and collecting device, thereby collecting the spider silk structure-imitation mist-collected thermoformed braided yarn.

[0073] In some embodiments, as Figure 4 As shown, there are Q second yarn feeding mechanisms, Q is a positive integer, and each second yarn feeding mechanism feeds the second yarn. There are Y third yarn feeding mechanisms, Y is a positive integer, and each third yarn feeding mechanism feeds the third yarn, ensuring the uniform feeding of each yarn and the stability of the weaving process; at the same time, the first yarn feeding mechanism, Q second yarn feeding mechanisms and Y third yarn feeding mechanisms can respectively accurately control the feed amount and speed of the first yarn, the second yarn and the third yarn, thereby effectively avoiding yarn waste or breakage caused by excessive tension, and improving the continuity and stability of production.

[0074] In some embodiments, as Figure 3As shown, the weaving mechanism drives Q second yarn feeding mechanisms and Y third yarn feeding mechanisms to rotate, with a weaving pitch of 1-8mm and a weaving speed of 800r / min-1500r / min, and a one-press-one weaving pattern method to mix and weave the first yarn, the second yarn, and the third yarn. The second yarn and the third yarn are formed on the periphery of the first yarn to obtain a braided yarn. The one-press-one weaving pattern method can make the structure of the braided yarn more compact and uniform, enhance the bonding force between the yarns, and help improve the tensile strength and tear resistance of the braided yarn. The regularity of the weaving pattern also ensures the neat appearance of the braided yarn. At the same time, mixing the first yarn, the second yarn, and the third yarn can achieve the combination of multiple functions on the same braided yarn, thereby improving the strength, toughness, durability, and functional diversity of the braided yarn.

[0075] In some embodiments, the first yarn feeding mechanism, the second yarn feeding mechanism, and the third yarn feeding mechanism can all include a yarn feeding wheel, a motor, a yarn guide mechanism, etc. These are existing technologies in the existing textile technology field, and the present invention application will not elaborate on them. The pulling mechanism may include: a traction roller, a tension control device, and an electric motor. The pulling mechanism pulls the braided yarn and ensures that the tension of the braided yarn is moderate. The winding mechanism includes a winding roller, a driving device, a winding tension controller, etc. The winding mechanism winds the braided yarn and ensures the tightness and shape stability of the braided yarn by controlling the winding tension and speed, thereby preventing the braided yarn from becoming loose or deformed. The collecting mechanism includes a guide device and a reel. The collecting mechanism neatly collects the spider silk structure mist collection thermoformed braided yarn onto the reel, ensuring that the spider silk structure mist collection thermoformed braided yarn is neatly arranged in a predetermined manner, which is convenient for subsequent storage, packaging or further processing.

[0076] In some embodiments, the spider silk structure mist collection thermoforming braided wire prepared by the method for preparing the spider silk structure mist collection thermoforming braided wire, the second yarn will be used to form protrusions and connecting parts after heat treatment, and the final spider silk structure mist collection thermoforming braided wire at least includes: along the length direction of the spider silk structure mist collection thermoforming braided wire, there are multiple protrusions distributed on the surface of the spider silk structure mist collection thermoforming braided wire, along the cross-sectional direction of the spider silk structure mist collection thermoforming braided wire, there are also multiple protrusions distributed on the periphery of the braided wire surface, and a connecting part is formed between two adjacent protrusions, the connecting part connects the third yarn and the first yarn, and the connecting part connects two adjacent protrusions.

[0077] In the method for preparing the spider silk structure mist collection thermoforming braided wire applied by the present invention, the first yarn is rolled out from the first yarn feeding mechanism and the collecting mechanism is correspondingly wound in through the winding and collecting device, which can form a process operation match in the method for preparing the spider silk structure mist collection thermoforming braided wire, and the strength, toughness and durability of the obtained braided wire can be ensured by reasonable yarn selection and precise multiple yarn feeding mechanisms of the spider silk structure mist collection thermoforming braided wire preparation device, appropriate braiding pitch, braiding speed, braiding pattern and mixed braiding settings, the heating mechanism heats the braided wire at a set temperature or a set temperature range, and the heating time is set After that, the heat-treated braided wire can be cooled at room temperature to obtain a spider silk structure mist collection thermoforming braided wire. There are multiple protrusions distributed on the surface of the spider silk structure mist collection thermoforming braided wire, which realizes the customized setting of the surface structure of the spider silk structure mist collection thermoforming braided wire, and also realizes the high customization and scale of the preparation process of the spider silk structure mist collection thermoforming braided wire, which provides a flexible and efficient preparation solution for the needs of different spider silk structure mist collection thermoforming braided wires. Moreover, the preparation process of the spider silk structure mist collection thermoforming braided wire is a green process, which will not cause physical and chemical pollution to the environment and has good ecological environmental friendliness.

[0078] Optionally, the second yarn strand number Q and the third yarn strand number Y satisfy: Q+Y=QY, where QY is a preset strand number.

[0079] In some embodiments, the preset number of strands QY can be 6 strands, 7 strands, 8 strands, 9 strands, 10 strands, etc. Of course, those skilled in the art can also reasonably set the preset number of strands QY according to actual conditions, and the present invention does not impose any particular limitation on this.

[0080] In some embodiments, the first yarn includes a first monofilament, and each first yarn includes n1 of the first monofilament, each second yarn includes n2 of the second monofilament, and each third yarn includes a third monofilament, and each third yarn includes n3 of the third monofilament.

[0081] In some embodiments, as Figure 5 As shown, the structural diagram of the braided wire surface; Figure 6 As shown, it is a schematic diagram of the cross-sectional structure of the braided yarn. For example, the number of strands of the second yarn is 1 and the number of strands of the third yarn is 7.

[0082] In some embodiments, as Figure 7As shown in the figure, a simplified model structure diagram of the braided wire is shown. If the second yarn is woven around the braided wire to form a spiral winding, each time the second yarn completes a complete winding cycle (i.e. corresponding to a braiding pitch P), during a complete winding cycle, the length of the trajectory traveled by the second yarn (which can be recorded as the spiral length R of the second yarn) is approximately the length of the spiral line based on the central axis of the braided wire.

[0083] In some embodiments, as Figure 8 As shown in FIG, a schematic diagram of the Pythagorean principle of the braided yarn is shown. According to the Pythagorean theorem, for an approximate spiral, within the length of a braiding pitch P, the spiral of the second yarn can be regarded as the hypotenuse of a right triangle after being unfolded, with one right-angled side being the braiding pitch P and the other right-angled side being a value based on the perimeter πD of the braided yarn. Accordingly, assuming that the winding angle of the second yarn is relatively stable, the spiral length R of the second yarn, the diameter D of the braided yarn, and the braiding pitch P of the braided yarn satisfy the relationship:

[0084] π 2 D 2 +P 2 =R 2 (1)

[0085] Where D is the diameter of the braided yarn and R is the helical length of the second yarn during a complete winding cycle.

[0086] In some embodiments, as Figure 5 As shown, the portion of the second yarn exposed on the surface of the braided yarn (which can be recorded as the second yarn exposed portion 201) is heat-treated by the heating mechanism to form a protrusion 30. Furthermore, along the length direction of the spider silk-like mist-collecting thermoformed braided yarn, a plurality of protrusions 30 are distributed on the surface of the spider silk-like mist-collecting thermoformed braided yarn. Based on the principle of constant volume before and after heat treatment, the volume relationship between the second exposed portion and the protrusion satisfies:

[0087] V M =V E (2)

[0088] Among them, V M is the volume of a second exposed portion 201 on the surface of the braided wire, V E is the volume of a bulge formed on the surface of the second exposed portion 201 after heat treatment by the heating mechanism, correspondingly:

[0089]

[0090] L ais the length of the exposed part of the second yarn, d2 represents the diameter of the second filament constituting the second yarn; n2 is the number of second filaments in the second yarn, projected vertically downward along the direction perpendicular to the central axis of the spider silk structure mist collection thermoforming braided wire (which may mean a top view), w is the width of a complete protrusion, l is the length of a complete protrusion, along the cross-sectional direction of the spider silk structure mist collection thermoforming braided wire, h is the height of the protrusion, and h1 is the inner height of the protrusion.

[0091] In some embodiments, as Figure 5 As shown, in a complete winding cycle, the third yarn will cover part of the second yarn, the width H of the third yarn, the spiral length R of the second yarn and the length L of the exposed portion 201 of the second yarn a Satisfaction relationship:

[0092]

[0093] Wherein, H is the yarn width of the third yarn during a complete winding cycle.

[0094] In some embodiments, the first yarn and the third yarn satisfy the relationship:

[0095]

[0096] Wherein, D1 is the diameter of the first yarn, S1 is the cross-sectional area of ​​the first yarn, n1 is the number of first filaments in the first yarn, s1 is the cross-sectional area of ​​the first filament, and d1 constitutes the first filament diameter of the first yarn; S3 is the cross-sectional area of ​​the third yarn, n3 is the number of third filaments in the third yarn, s3 is the cross-sectional area of ​​the third filament, and d3 constitutes the third filament diameter of the third yarn;

[0097] In some embodiments, the inner height h1 of the protrusion and the length l of the protrusion satisfy:

[0098]

[0099] Wherein, T3 represents the cross-sectional thickness of the third yarn.

[0100] Accordingly, the width w of the protrusion, the height h of the protrusion, and the diameter D of the braided wire satisfy:

[0101]

[0102] Therefore, in step S100, using the above formula (9), except for the height h, width w of the protrusion and the diameter D of the braided wire, all other parameters are known and can be substituted into the above formula (9) for calculation. Of course, the diameter D of the braided wire can also be preset, and the width and height of the protrusion can be preset according to the above formula (9). Along the length direction of the braided wire, the number of protrusions can be preset to a predetermined value, thereby realizing a customized setting of the surface structure of the spider silk structure mist collection thermoformed braided wire.

[0103] Optionally, the material of the first yarn is aramid fiber PPTA, the material of the second yarn includes thermoplastic polyurethane fiber TPU, the third yarn includes polyamide yarn fiber PA, and the width w of the protrusion, the height h of the protrusion, and the diameter D of the braided wire meet the following conditions:

[0104]

[0105] Among them, w is the width of a protrusion when projected vertically downward along the direction of the central axis of the spider silk structure mist collection thermoformed braided wire; h is the height of the protrusion along the cross-sectional direction of the spider silk structure mist collection thermoformed braided wire; and D is the diameter of the braided wire.

[0106] In some embodiments, according to the respective geometric parameters of the aramid fiber PPTA, the thermoplastic polyurethane fiber TPU, and the polyamide yarn fiber PA, the aramid fiber diameter d1 is 0.605 μm, the thermoplastic polyurethane fiber TPU diameter d2 is 210 μm, the polyamide yarn fiber PA diameter d3 is 4.17 μm, n3=48, n2=1, n1=400, P=2000 μm, the protrusion width w, the protrusion height h, and the braided wire diameter D satisfy:

[0107]

[0108]

[0109] The cross-sectional thickness T3 of the third yarn can be approximately equal to 0, that is:

[0110]

[0111] Therefore, in the present application, when the material of the first yarn is aramid fiber PPTA, the material of the second yarn includes thermoplastic polyurethane fiber TPU, and the third yarn includes polyamide yarn fiber PA, the diameter D of the braided wire can be set using the above formula (9) and the above formula (10), and the width and height of the protrusion can be set according to the above formula (9) and the above formula (10). Along the length direction of the braided wire, a plurality of protrusions can be distributed on the surface of the braided wire, thereby realizing a customized setting of the surface structure of the spider silk structure fog collection thermoforming braided wire. On the basis of the difference in hydrophilicity and hydrophobicity between the protrusions and the third yarn, due to the periodic arrangement of the protrusions, the Laplace pressure difference formed, the arrangement and size of the plurality of protrusions can realize different fog collection capabilities of the spider silk structure fog collection thermoforming braided wire; at the same time, the aramid fiber PPTA provides the spider silk structure fog collection thermoforming braided wire with sufficient tensile strength and durability, thereby achieving the consideration and integration of water collection performance and mechanical toughness, and the spider silk structure fog collection thermoforming braided wire has broad market prospects and application value.

[0112] Optionally, the preset number of strands QY is 8, the braiding pitch is 2 mm or 3 mm, the braiding speed is 800 r / min or 1000 r / min, the set temperature of the heating mechanism is 50° C.-200° C., and the set time is 5s-120s.

[0113] In some embodiments, the set temperature of the heating mechanism is 50°C-200°C, for example, 50°C, 60°C, 90°C, 100°C, 105°C, 110°C, 120°C, 125°C, 130°C, 140°C, 150°C, 160°C, 180°C, 200°C, or a numerical range between any two of the above values; the set time is 5s-120s, for example, 5s, 10s, 20s, 25s, 30s, 35s, 40s, 50s, 60s, 70s, 80s, 120s, or a numerical range between any two of the above values. Of course, those skilled in the art can reasonably set the size of the heating temperature and the set time according to actual conditions, and the present invention does not impose any particular limitation on this.

[0114] Spider silk-like structure fog collection thermoformed braided wire Example 1, Example 2, Example 3, Example 4, Example 5

[0115] In Examples 1 to 5, the material of the first yarn is aramid fiber PPTA, the material of the second yarn is thermoplastic polyurethane fiber TPU, and the material of the third yarn is polyamide yarn fiber PA.

[0116] like Figure 10As shown, the heating temperature is determined based on the DSC test results. The heating temperature can be set to greater than 53.6 degrees. At this time, the thermoplastic polyurethane fiber TPU can be completely melted, and the aramid fiber PPTA is not affected. Accordingly, the surface structure of the spider silk structure fog collection thermoforming braided wire can be changed. At the same time, the aramid fiber PPTA is used to retain the mechanical properties of the spider silk structure fog collection thermoforming braided wire to the greatest extent.

[0117] like Figure 11 and Figure 12 As shown, according to the infrared curves of aramid fiber PPTA, thermoplastic polyurethane fiber TPU, and polyamide yarn fiber PA, the water contact angle of aramid fiber PPTA is 42 degrees, the water contact angle of thermoplastic polyurethane fiber TPU is 28.5 degrees, and the water contact angle of polyamide yarn fiber PA is 104 degrees. It can be seen that aramid fiber PPTA is hydrophilic, polyamide yarn fiber PA is super hydrophilic, and thermoplastic polyurethane fiber TPU is hydrophobic.

[0118] Example 1: Thermoformed braided wire A with a spider silk-like structure and large protrusions for fog collection

[0119] Step S11: Set the parameters of the first yarn, the second yarn and the third yarn. The material of the first yarn is aramid fiber PPTA with a diameter of 600D; the material of the second yarn is thermoplastic polyurethane fiber TPU, the diameter of the second yarn is 150D, and the number of strands of the second yarn is 1; the material of the third yarn is polyamide yarn fiber PA, the diameter of the third yarn is 150D, and the number of strands of the third yarn is 7. In some embodiments, the above formula (9) can be used to pre-set the diameter D of the braided yarn, the width w of the protrusion and the height of the protrusion.

[0120] Step S12: The first yarn is used as the core yarn, and the second yarn and the third yarn are used as the shell yarns, and the first yarn, the second yarn, and the third yarn are mixed and braided to obtain the braided yarn. Specifically, step S12 includes: a first yarn feeding mechanism feeds the first yarn, a second yarn feeding mechanism is provided, a second yarn feeding mechanism feeds the second yarn, a third yarn feeding mechanism is provided, and a third yarn feeding mechanism feeds the third yarn, the braiding pitch is 3 mm, the braiding speed is 800 r / min, the braiding pattern is one-on-one, and the first yarn, the second yarn, and the third yarn are mixed and braided to obtain the braided yarn;

[0121] Step S13: The braided wire is introduced into the heating mechanism, and the heating mechanism heats the braided wire at a set temperature of 110°C. After heating for 20 seconds, the heated braided wire leaves the heating mechanism and is cooled and collected at room temperature to obtain a spider silk structure mist collection thermoformed braided wire A.

[0122] Example 2: Symmetrically arranged protrusions and spider silk-like structure fog collection thermoformed braided wire B

[0123] Step S21: Set the parameters of the first yarn, the second yarn and the third yarn. The material of the first yarn is aramid fiber PPTA with a diameter of 600D; the material of the second yarn is thermoplastic polyurethane fiber TPU, the diameter of the second yarn is 150D, and the number of strands of the second yarn is 2; the material of the third yarn is polyamide yarn fiber PA, the diameter of the third yarn is 150D, and the number of strands of the third yarn is 6. In some embodiments, the above formula (9) can be used to pre-set the diameter D of the braided yarn, the width w of the protrusion and the height of the protrusion.

[0124] Step S22: The first yarn is used as the core yarn, and the second yarn and the third yarn are used as the shell yarns, and the first yarn, the second yarn, and the third yarn are mixed and braided to obtain the braided yarn. Specifically, step S22 includes: a first yarn feeding mechanism feeds the first yarn, two second yarn feeding mechanisms are provided, the second yarn feeding mechanism feeds the second yarn, six third yarn feeding mechanisms are provided, and the third yarn feeding mechanism feeds the third yarn, the braiding pitch is 2 mm, the braiding speed is 1000 r / min, the braiding pattern is one-on-one, and the first yarn, the second yarn, and the third yarn are mixed and braided to obtain the braided yarn;

[0125] Step S23: The braided yarn is introduced into the heating mechanism, and the heating mechanism heats the braided yarn at a set temperature of 120°C. After heating for 25 seconds, the heated braided yarn leaves the heating mechanism, and the heated braided yarn is cooled and collected at room temperature to obtain the spider silk structure mist collection thermoformed braided yarn B.

[0126] Example 3: Spider silk-like mist collection thermoformed braided wire C with high density of protrusions

[0127] Step S31: Set the parameters of the first yarn, the second yarn and the third yarn. The material of the first yarn is aramid fiber PPTA with a diameter of 600D; the material of the second yarn is thermoplastic polyurethane fiber TPU, the diameter of the second yarn is 150D, and the number of strands of the second yarn is 4; the material of the third yarn is polyamide yarn fiber PA, the diameter of the third yarn is 150D, and the number of strands of the third yarn is 4. In some embodiments, the above formula (9) can be used to pre-set the diameter D of the braided yarn, the width w of the protrusion and the height of the protrusion.

[0128] Step S32: The first yarn is used as the core yarn, and the second yarn and the third yarn are used as the shell yarns, and the first yarn, the second yarn, and the third yarn are mixed and braided to obtain the braided yarn. Specifically, step S32 includes: a first yarn feeding mechanism feeds the first yarn, four second yarn feeding mechanisms are provided, the second yarn feeding mechanism feeds the second yarn, four third yarn feeding mechanisms are provided, and the third yarn feeding mechanism feeds the third yarn, the braiding pitch is 2 mm, the braiding speed is 1000 r / min, the braiding pattern is one-on-one, and the first yarn, the second yarn, and the third yarn are mixed and braided to obtain the braided yarn;

[0129] Step S33: The braided wire is introduced into the heating mechanism, and the heating mechanism heats the braided wire at a set temperature of 130°C. After heating for 30 seconds, the heated braided wire leaves the heating mechanism and is cooled and collected at room temperature to obtain a spider silk structure mist collection thermoformed braided wire C.

[0130] Example 4: Spider silk-like mist collection thermoformed braided wire D with high density of protrusions

[0131] Step S41: Set the parameters of the first yarn, the second yarn and the third yarn. The material of the first yarn is aramid fiber PPTA with a diameter of 1200D; the material of the second yarn is thermoplastic polyurethane fiber TPU, the diameter of the second yarn is 150D, and the number of strands of the second yarn is 4; the material of the third yarn is polyamide yarn fiber PA, the diameter of the third yarn is 150D, and the number of strands of the third yarn is 4. In some embodiments, the above formula (9) can be used to pre-set the diameter D of the braided yarn, the width w of the protrusion and the height of the protrusion.

[0132] Step S42: The first yarn is used as the core yarn, and the second yarn and the third yarn are used as the shell yarns, and the first yarn, the second yarn, and the third yarn are mixed and braided to obtain the braided yarn. Specifically, step S42 includes: a first yarn feeding mechanism feeds the first yarn, four second yarn feeding mechanisms are provided, the second yarn feeding mechanism feeds the second yarn, four third yarn feeding mechanisms are provided, and the third yarn feeding mechanism feeds the third yarn, the braiding pitch is 2 mm, the braiding speed is 1000 r / min, the braiding pattern is one-on-one, and the first yarn, the second yarn, and the third yarn are mixed and braided to obtain the braided yarn;

[0133] Step S43: The braided yarn is introduced into the heating mechanism, and the heating mechanism heats the braided yarn at a set temperature of 130°C. After heating for 30 seconds, the heated braided yarn leaves the heating mechanism and is cooled and collected at room temperature to obtain a spider silk structured mist collection thermoformed braided yarn D.

[0134] Example 5: Spider silk-like mist collection thermoformed braided wire E with high density of protrusions

[0135] Step S51: Set the parameters of the first yarn, the second yarn and the third yarn. The material of the first yarn is aramid fiber PPTA with a diameter of 1800D; the material of the second yarn is thermoplastic polyurethane fiber TPU, the diameter of the second yarn is 150D, and the number of strands of the second yarn is 4; the material of the third yarn is polyamide yarn fiber PA, the diameter of the third yarn is 150D, and the number of strands of the third yarn is 4. In some embodiments, the above formula (9) can be used to pre-set the diameter D of the braided yarn, the width w of the protrusion and the height of the protrusion.

[0136] Step S52: The first yarn is used as the core yarn, and the second yarn and the third yarn are used as the shell yarns, and the first yarn, the second yarn, and the third yarn are mixed and braided to obtain the braided yarn. Specifically, step S52 includes: a first yarn feeding mechanism feeds the first yarn, four second yarn feeding mechanisms are provided, the second yarn feeding mechanism feeds the second yarn, four third yarn feeding mechanisms are provided, and the third yarn feeding mechanism feeds the third yarn, the braiding pitch is 2 mm, the braiding speed is 1000 r / min, the braiding pattern is one-on-one, and the first yarn, the second yarn, and the third yarn are mixed and braided to obtain the braided yarn;

[0137] Step S53: The braided wire is introduced into the heating mechanism, and the heating mechanism heats the braided wire at a set temperature of 130°C. After heating for 30 seconds, the heated braided wire leaves the heating mechanism and is cooled and collected at room temperature to obtain the spider silk structure mist collection thermoformed braided wire E.

[0138] like Figure 13 As shown, compared with the existing PPTA braided wire, the spider silk-like structure mist collection thermoformed braided wire prepared by the present invention has a significantly excellent mist collection effect.

[0139] like Figure 14 As shown, by comparing the fog collection effects of the spider silk structure fog collection thermoformed braided wire A of Example 1, the spider silk structure fog collection thermoformed braided wire B of Example 2 and the spider silk structure fog collection thermoformed braided wire C of Example 3, it can be seen that: within the same time, the spider silk structure fog collection thermoformed braided wire B of Example 2 and the spider silk structure fog collection thermoformed braided wire C of Example 3 have a regular and larger water collection effect, and the density and size of the protrusions on the surface of the spider silk structure fog collection thermoformed braided wire have a greater influence on its fog collection performance.

[0140] like Figure 15As shown, by comparing the tensile fracture stress-strain curves of the spider silk structure mist collection thermoformed braided wire C before and after heat treatment of Example 3, the tensile fracture stress-strain curves of the spider silk structure mist collection thermoformed braided wire D before and after heat treatment of Example 4, and the tensile fracture stress-strain curves of the spider silk structure mist collection thermoformed braided wire E before and after heat treatment of Example 5, it can be seen that: through the tensile fracture test, the results show that the mechanical strength of the spider silk structure mist collection thermoformed braided wire is mainly determined by the thickness of the core yarn, and the heat treatment process has little effect on its fracture stress.

[0141] like Figure 16 As shown, the wear resistance of the spider silk structure mist collection thermoformed braided wire can be tested. The wear resistance test method of the spider silk structure mist collection thermoformed braided wire includes: winding and fixing one end of the spider silk structure mist collection thermoformed braided wire, hanging a weight on the other end to maintain tension, using 1000 mesh sandpaper, running at a speed of 60 circles / minute, and grinding the sandpaper on the middle section of the spider silk structure mist collection thermoformed braided wire 1000 times, and then observing the wear of the spider silk structure mist collection thermoformed braided wire. For example, by comparing the wear resistance of the spider silk structure mist collection thermoformed braided wire A of Example 1, the wear resistance of the spider silk structure mist collection thermoformed braided wire B of Example 2, and the wear resistance of the spider silk structure mist collection thermoformed braided wire C of Example 3, it can be seen that the spider silk structure mist collection thermoformed braided wire A of Example 1, the spider silk structure mist collection thermoformed braided wire B of Example 2, and the spider silk structure mist collection thermoformed braided wire C of Example 3 all have a certain wear resistance. The reason is that: since the spider silk structure mist collection thermoformed braided wire has the main mechanical properties provided by the core yarn, the wear of the outer layer has little effect on its overall strength. Therefore, the spider silk structure mist collection thermoformed braided wire has certain durability and wear resistance.

[0142] The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if a person skilled in the art is inspired by the drawings and, without departing from the inventive purpose of the present invention, designs a structure and embodiment similar to the technical solution without inventiveness, they shall fall within the scope of protection of the present invention.

Claims

1. A spider silk-like mist collection thermoformed braided wire, characterized in that: include: A core layer and a shell layer, wherein the shell layer is formed on the periphery of the core layer, the core layer includes a first yarn, the material of the first yarn includes at least one of polyethylene fiber, aramid fiber PPTA and carbon fiber, the shell layer includes a third yarn and protrusions, the protrusions are formed on the periphery of the third yarn, the material of the third yarn includes one of thermoplastic polyurethane fiber TPU, low-melting point polyester fiber PET, and polyamide yarn fiber PA, and the material of the protrusions includes one of thermoplastic polyurethane fiber TPU, low-melting point polyester fiber PET, and polyamide yarn fiber PA; a plurality of protrusions are distributed on the surface of the spider silk structure mist collection thermoformed braided wire along the length direction of the spider silk structure mist collection thermoformed braided wire; A connecting portion is formed between two adjacent protrusions, the connecting portion connects the third yarn and the first yarn, and the connecting portion connects the two adjacent protrusions; The protrusion and the third yarn form a difference in hydrophilicity and hydrophobicity, including: the protrusion is hydrophilic and the third yarn is hydrophobic; Alternatively, the protrusions are hydrophobic and the third yarn is hydrophilic.

2. The spider silk-like mist collection thermoformed braided wire according to claim 1, characterized in that: The material of the first yarn is aramid fiber PPTA, the material of the third yarn includes polyamide yarn fiber PA, and the material of the protrusion includes thermoplastic polyurethane fiber TPU.

3. A method for preparing a spider silk-like mist collection thermoformed braided wire, comprising preparing the spider silk-like mist collection thermoformed braided wire according to any one of claims 1 to 2, characterized in that: include: Step S100: Setting parameters of the first yarn, the second yarn, and the third yarn. The parameters of the first yarn include the material of the first yarn and the diameter of the first yarn; the parameters of the second yarn include the material of the second yarn, the diameter of the second yarn, and the number of strands Q of the second yarn; and the parameters of the third yarn include the material of the second yarn, the diameter of the third yarn, and the number of strands Y of the third yarn. Step S200: The first yarn is used as the core yarn, and the second yarn and the third yarn are used as the shell yarns. The first yarn, the second yarn and the third yarn are mixed and knitted. The second yarn and the third yarn are formed on the periphery of the first yarn to obtain a braided yarn. Step S300: The braided wire is introduced into a heating mechanism, and the heating mechanism heats the braided wire at a set temperature or a set temperature range. After the set heating time, the heated braided wire leaves the heating mechanism and is cooled at room temperature to obtain a spider silk-like mist-collecting thermoformed braided wire.

4. The method for preparing a spider silk-like mist collection thermoformed braided wire according to claim 3, characterized in that: Step S100 includes: Step S101: Setting parameters of a first yarn, the parameters of the first yarn including the material of the first yarn and the diameter of the first yarn, the material of the first yarn including at least one of polyethylene fiber, aramid fiber PPTA and carbon fiber; the diameter of the first yarn is 600D-1800D; Step S102: Setting parameters of the second yarn, the parameters of the second yarn include the material of the second yarn, the diameter of the second yarn, and the number of strands Q of the second yarn; the material of the second yarn includes one of thermoplastic polyurethane fiber TPU, low-melting point polyester fiber PET, and polyamide yarn fiber PA, and the diameter of the second yarn is 50D-300D; Step S103: Set the parameters of the third yarn, which include the material of the second yarn, the diameter of the third yarn, and the number of strands of the third yarn Y; the material of the third yarn includes one of thermoplastic polyurethane fiber TPU, low-melting point polyester fiber PET, and polyamide yarn fiber PA; the diameter of the second yarn is 50D-300D.

5. The method for preparing a spider silk-like mist collection thermoformed braided wire according to claim 4, characterized in that: Step S200 includes: Step S201: a first yarn feeding mechanism feeds a first yarn, Q second yarn feeding mechanisms are provided, each second yarn feeding mechanism feeds a second yarn, and Y third yarn feeding mechanisms are provided, each third yarn feeding mechanism feeds a third yarn; Step S202: The first yarn is used as the core yarn, the second yarn and the third yarn are used as the shell yarn, the weaving pitch is 1-8 mm, the weaving speed is 800 r / min-1500 r / min, the weaving pattern is one-on-one, the first yarn, the second yarn and the third yarn are mixed and the second yarn and the third yarn are formed on the periphery of the first yarn to obtain the woven yarn.

6. The method for preparing a spider silk-like mist collection thermoformed braided wire according to claim 5, characterized in that: The second yarn ply number Q and the third yarn ply number Y satisfy: Q+Y=QY, where QY is the preset ply number.

7. The method for preparing a spider silk-like mist collection thermoformed braided wire according to claim 6, characterized in that: The preset number of strands QY is 8, the weaving pitch is 2 mm or 3 mm, the weaving speed is 800 r / min or 1000 r / min, the set temperature of the heating mechanism is 50°C-200°C, and the set time is 5s-120s.

8. The method for preparing a spider silk-like mist collection thermoformed braided wire according to claim 7, characterized in that: The material of the first yarn is aramid fiber PPTA, the material of the second yarn includes thermoplastic polyurethane fiber TPU, the third yarn includes polyamide yarn fiber PA, and the width of the protrusion is , height of the protrusion , the diameter D of the braided wire satisfies: ) Among them, w is the width of a protrusion when projected vertically downward along the direction of the central axis of the spider silk structure mist collection thermoformed braided wire; h is the height of the protrusion along the cross-sectional direction of the spider silk structure mist collection thermoformed braided wire; and D is the diameter of the braided wire.

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