A spinning collection device for cross-linked polymer fibers

Abstract

This invention relates to the field of spinning, specifically to a spinning collection device for cross-linked polymer fibers. The spinning collection device includes a spinning head, a first accommodating component, a second accommodating component, and a collecting roller. The first accommodating component includes a first accommodating cavity containing a first liquid. The second accommodating component includes a second accommodating cavity containing a second liquid. The coaxial spinning head is immersed in the first liquid and can output a fiber structure to be formed, in which a hydrogel shell encapsulates a cross-linked prepolymer core. The cross-linked prepolymer core cross-links in the first liquid to form fibers, and the hydrogel shell dissolves and is removed in the second liquid. By sequentially performing the steps of cross-linking the cross-linked prepolymer and dissolving and removing the hydrogel shell, a continuous and efficient cross-linked polymer fiber production process can be achieved, greatly improving production efficiency and controllability, reducing material consumption, and promoting the mass production of cross-linked polymer fibers.

Description

Technical Field

[0001] This invention relates to the field of spinning, and more specifically to a spinning collection device for cross-linked polymer fibers. Background Technology

[0002] Crosslinked polymers are a class of polymers that are difficult to reprocess by melting or dissolving after crosslinking and curing. They typically possess excellent physicochemical stability and have broad potential in various applications. For example, most silicone-based materials are prepared through prepolymer crosslinking, and their stability makes them widely used in food, medicine, and other fields. Moreover, many crosslinked polymers exhibit excellent flexibility and stretchability. Compared to traditionally used elastic materials such as rubber and polyurethane, their advantages in stability and biocompatibility make them potential candidates for developing novel flexible and stretchable materials.

[0003] Developing cross-linked polymers into fibers is an effective way to leverage their performance advantages. For example, cross-linked polymer fibers with excellent stretchability, after conductive modification, hold promise for developing stretchable wires; some cross-linked polymers possess excellent light transmittance, and their fibers can be used as stretchable optical fibers. However, current technologies for preparing cross-linked polymer fibers have limitations or are overly complex. Due to the slow cross-linking rate of cross-linked polymer prepolymers, researchers typically use tubular mold injection molding, but this method has extremely low production efficiency. Furthermore, due to the poor spinnability of their prepolymers, wet spinning methods struggle to simultaneously achieve mass production and superior fiber quality. Therefore, the mass production and high-quality manufacturing of cross-linked polymer fibers remain challenging.

[0004] Hydrogel-assisted cross-linked polymer spinning is a recently proposed spinning technique. It utilizes a coaxial spinning head to encapsulate cross-linked polymers within alginate hydrogel fibers, thereby assisting in the spinning and forming of the cross-linked polymer fibers. Traditional preparation equipment and procedures require waiting for the cross-linked polymer core fibers to cross-link and solidify after coaxial spinning before the hydrogel shell can be dissolved and removed. This process involves step-by-step steps such as fiber transfer, shell dissolution, cleaning, and drying, which are not only time-consuming but also involve numerous manual operations, resulting in low production efficiency, high costs, and poor controllability. Summary of the Invention

[0005] To address the aforementioned problems, this invention provides a spinning collection device for cross-linked polymer fibers, which solves the problem of low production efficiency and inability to achieve long-term mass production collection of existing cross-linked polymer fibers.

[0006] To achieve the above objectives, the present invention provides a spinning and collecting device for cross-linked polymer fibers, comprising a coaxial spinning head, a first containing assembly, a second containing assembly, and a collecting roller. The coaxial spinning head includes an annular output end and a axial output end, the annular output end being sleeved outside the axial output end. The annular output end is used to output an aqueous solution, and the axial output end is used to output a cross-linked prepolymer. The aqueous solution coats the cross-linked prepolymer. The first containing assembly includes a first containing cavity containing a first liquid. The output end of the coaxial spinning head is immersed in the first liquid and passes through the first containing cavity at a first preset speed. The system includes a cavity, a first liquid for reacting an aqueous solution to form a hydrogel shell, and for forming cross-linked polymer fibers from a cross-linked prepolymer, and for forming a hydrogel shell from an aqueous solution, wherein the hydrogel shell and the cross-linked polymer fibers form a core-shell fiber; a second accommodating assembly is disposed adjacent to the first accommodating assembly, the second accommodating assembly including a second accommodating cavity containing a second liquid, wherein the core-shell fiber is immersed in the second solution and passes through the second accommodating cavity at a second preset speed; the second solution is used to dissolve the hydrogel shell outside the cross-linked polymer fiber; and a collecting roller is used to collect the cross-linked polymer fiber output from the second accommodating cavity.

[0007] In some embodiments, the first accommodating assembly further includes a first accommodating member and a first heating member, the first accommodating member having a first accommodating cavity; the first heating member is connected to the first accommodating member and is used to heat a first liquid; the second accommodating assembly further includes a second accommodating member and a second heating member, the second accommodating member having a second accommodating cavity; the second heating member is connected to the second accommodating member and is used to heat a second liquid.

[0008] In some embodiments, the first receiving member includes a first base, a first annular wall, and a second annular wall. The first base is capable of rotating at a first preset rotation speed. The first annular wall is disposed on the first base. The second annular wall is disposed on the first base and coaxially disposed with the first annular wall. The diameter of the second annular wall is larger than the diameter of the first annular wall. A first receiving cavity is formed between the first annular wall and the second annular wall.

[0009] The second receiving member includes a second base, a third annular wall, and a fourth annular wall. The second base is capable of rotating at a second preset rotation speed. The third annular wall is disposed on the second base. The fourth annular wall is disposed on the second base and is coaxially disposed with the third annular wall. The diameter of the fourth annular wall is larger than the diameter of the third annular wall. A second receiving cavity is formed between the third annular wall and the fourth annular wall.

[0010] In some embodiments, the first preset rotational speed is represented by formula (1), which is as follows:

[0011]

[0012] In formula (1), QS Q is the flow rate of the aqueous solution. C D represents the flow rate of the cross-linked prepolymer. F D1 is the initial diameter of the core-shell fiber, D2 is the diameter of the first ring wall, D2 is the diameter of the second ring wall, and R1 is the rotational speed of the first base.

[0013] The second preset rotational speed is expressed by formula (2), which is as follows:

[0014]

[0015] In formula (2), D3 is the diameter of the third ring wall, D4 is the diameter of the fourth ring wall, and R2 is the rotational speed of the second base.

[0016] In some embodiments, the temperature range of the first heating element when heating the first liquid and / or the second heating element when heating the second liquid is 40°C-95°C.

[0017] In some embodiments, the movable length of the core-shell fiber in the first accommodating cavity and the first preset speed are represented by formula (3), which is as follows:

[0018] L1≥v1·t1;

[0019] In formula (3), L1 is the movable length of the core-shell fiber in the first accommodating cavity, v1 is the first preset speed, and t1 is the time required for the cross-linked prepolymer to be completely cross-linked.

[0020] The movable length of the core-shell fiber in the second accommodating cavity and the second preset speed are expressed by formula (4), which is as follows:

[0021] L2≥v2·t2;

[0022] In formula (4), L2 is the movable length of the core-shell fiber in the second accommodating cavity, v2 is the second preset speed, and t2 is the time required for the hydrogel shell to dissolve.

[0023] In some embodiments, the system further includes a first conveying component and a second conveying component. The first conveying component includes a plurality of first conveying rollers, a portion of which are disposed within a first receiving cavity, and another portion of which are disposed between the first receiving cavity and a second receiving cavity. The first conveying rollers are used to rotate at a third preset rotational speed to adjust the conveying direction and conveying speed of the core-shell fibers. The second conveying component includes a plurality of second conveying rollers, a portion of which are disposed within a second receiving cavity, and another portion of which are disposed between the second receiving cavity and a collecting roller. The second conveying rollers are used to rotate at a fourth preset rotational speed to adjust the conveying direction and conveying speed of the cross-linked polymer fibers.

[0024] In some embodiments, the third preset rotational speed is the same as the fourth preset rotational speed, the diameter of the first conveyor roller is the same as the diameter of the second conveyor roller, and the third preset rotational speed or the fourth preset rotational speed is expressed by formula (5), which is as follows:

[0025]

[0026] In formula (5), D5 is the diameter of the first conveyor roller, and R3 is the third preset rotational speed or the fourth preset rotational speed.

[0027] In some embodiments, the collecting roller collects the cross-linked polymer fibers at a fifth preset rotation speed, which is expressed by formula (6), as follows:

[0028]

[0029] In formula (6), D6 is the diameter of the collecting roller and R4 is the fifth preset rotation speed.

[0030] In some embodiments, the core-shell fiber is output from the first receiving cavity at a third preset speed. The first preset speed, the second preset speed, and the third preset speed are equal and equal to the moving speed of the fiber on the conveying roller and the collecting roller. The above relationship is expressed by formula (7), which is as follows:

[0031]

[0032] In formula (7), v3 is the third preset speed and D7 is the diameter of the cross-linked polymer fiber.

[0033] In some embodiments, the crosslinked prepolymer is at least one of polydimethylsiloxane, Ecoflex, neutral silicone, AB type epoxy resin, AB type polyurethane, and hygroscopic crosslinked one-component polyurethane; the dissolved substance in the aqueous solution is sodium alginate or potassium alginate, with a mass concentration of 0.2% to 5%; and / or, the dissolved substance in the first solution is one of soluble divalent calcium salt, divalent barium salt, divalent strontium salt, trivalent aluminum salt, and trivalent iron salt, with a mass concentration of 0.2% to 20%; and / or, the dissolved substance in the second solution is one of citrate, nitrate, phosphate, hypochlorite, dilute hydrochloric acid, dilute sulfuric acid, and ethylenediaminetetraacetic acid, with a mass concentration of 0.5% to 20%.

[0034] Compared with the prior art, the present invention can achieve the following beneficial effects:

[0035] The spinning collection device includes a coaxial spinning head, a first accommodating component, a second accommodating component, and a collecting roller. The first accommodating component includes a first accommodating cavity containing a first liquid. The second accommodating component includes a second accommodating cavity containing a second liquid. The coaxial spinning head is immersed in the first liquid and can output an aqueous solution to encapsulate the cross-linked prepolymer to form a fiber structure. The cross-linked prepolymer forms cross-linked polymer fibers in the first liquid, and the aqueous solution forms a hydrogel in the first liquid. The cross-linked polymer fibers are encapsulated in the hydrogel to form core-shell fibers. The second liquid dissolves the hydrogel shell structure of the core-shell fibers, leaving the cross-linked polymer fibers separately. The collecting roller then collects the cross-linked polymer fibers. This technical solution utilizes the first liquid in the first accommodating cavity and the second liquid in the second accommodating cavity to realize the formation of cross-linked prepolymer to cross-linked polymer fiber, and simultaneously performs the steps of aqueous solution to hydrogel and then dissolving hydrogel. This can realize a continuous and efficient cross-linked polymer fiber production process, greatly improve production efficiency and controllability, reduce material consumption, save time and labor costs, and promote the mass production and application of cross-linked polymer fiber. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the first receiving component and the coaxial spinning head of the spinning collection device provided in an embodiment of the present invention;

[0037] Figure 2 This is a schematic diagram of the second receiving component and the collecting roller of the spinning collecting device provided according to an embodiment of the present invention;

[0038] Figure 3 This is a schematic diagram of a spinning collection device provided according to an embodiment of the present invention.

[0039] Reference numerals: 1. First receiving element; 11. First receiving cavity; 12. First annular wall; 13. Second annular wall; 14. First base; 2. Second receiving element; 21. Second receiving cavity; 22. Third annular wall; 23. Fourth annular wall; 24. Second base; 3. Coaxial spinning head; 4. Collecting roller; 5. Cross-linked polymer fiber; 6. First conveying roller; 7. Second conveying roller. Detailed Implementation

[0040] In the following description, embodiments of the invention will be described with reference to the accompanying drawings. In the description below, the same modules are denoted by the same reference numerals. Where the same reference numerals are used, their names and functions are also the same. Therefore, their detailed description will not be repeated.

[0041] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not constitute a limitation thereof.

[0042] Please see Figures 1 to 3 This embodiment provides a spinning and collecting device for cross-linked polymer fibers, including a coaxial spinning head 3, a first accommodating assembly, a second accommodating assembly, and a collecting roller 4. The coaxial spinning head 3 includes an annular output end and a axial output end, with the annular output end sleeved outside the axial output end. The annular output end is used to output an aqueous solution, and the axial output end is used to output a cross-linked prepolymer. The aqueous solution coats the cross-linked prepolymer. The first accommodating assembly includes a first accommodating cavity 11, which contains a first liquid. The output end of the coaxial spinning head 3 is immersed in the first liquid and passes through the first accommodating cavity 11 at a first preset speed. The first liquid is used to react the aqueous solution to form a hydrogel shell, and to form cross-linked polymer fibers 5 from the cross-linked prepolymer, and to form a hydrogel from the aqueous solution, wherein the hydrogel and the cross-linked polymer fibers 5 form a core-shell fiber; the second accommodating assembly is disposed adjacent to the first accommodating assembly, the second accommodating assembly includes a second accommodating cavity 21, the second accommodating cavity 21 is filled with a second liquid, the core-shell fiber is immersed in the second solution and passes through the second accommodating cavity 21 at a second preset speed, the second solution is used to dissolve the hydrogel shell outside the cross-linked polymer fibers 5; the collecting roller 4 is used to collect the cross-linked polymer fibers 5 output from the second accommodating cavity 21.

[0043] It should be noted that the shape of the first accommodating cavity 11 and / or the second accommodating cavity 21 can be a cuboid, a cylinder, or a ring-shaped structure as described later; this embodiment does not impose any limitations on this. The first liquid in the first accommodating cavity 11 can promote the coagulation of the aqueous solution to form a hydrogel, and can also promote the formation of cross-linked polymer fibers 5 from the cross-linked prepolymer; the second liquid in the second accommodating cavity 21 can dissolve the hydrogel without affecting the already formed cross-linked polymer fibers 5. It should be noted that the aqueous solution shown in this embodiment refers to the solution coating the outside of the cross-linked prepolymer, and the term "water" in the aqueous solution is not intended to limit the solvent of the solution.

[0044] In a preferred embodiment, when the first accommodating cavity 11 and / or the second accommodating cavity 21 are rectangular grooves, the width of the first accommodating cavity 11 and / or the second accommodating cavity 21 should be at least 5 times the diameter of the cross-linked polymer fiber 5. When the first accommodating cavity 11 and / or the second accommodating cavity 21 are annular structures, the width of the first accommodating cavity 11 and / or the second accommodating cavity 21 should be at least 10 times the diameter of the cross-linked polymer fiber 5. Optionally, the depth of the groove can range from 2cm to 100cm, and can be set according to actual needs.

[0045] In this embodiment, the second accommodating component is arranged adjacent to the first accommodating component, which can be understood in two ways: First, the first accommodating component and the second accommodating component are adjacent in the manufacturing process, that is, the second accommodating component is the component required for the next manufacturing process after the cross-linked polymer fiber 5 is formed; Second, the first accommodating component and the second accommodating component are arranged adjacent in the spatial structure.

[0046] In this embodiment, core-shell fiber refers to fiber with both a core and an outer shell structure. Here, the core-shell fiber is a process product in the production of cross-linked polymer fiber 5. Specifically, this embodiment achieves the structural distribution of core-shell fiber through structural improvements to the coaxial spinning head 3: the coaxial spinning head 3 includes an annular output end and an axial output end, which are coaxially arranged; the annular output end has a hollow structure inside, for example, the radial cross-sectional shape of the aqueous solution is annular when it is output, and the axial output end is arranged in the hollow structure inside the annular output end, for example, the radial cross-section of the cross-linked prepolymer output by the axial output end is circular. This method allows the coaxial spinning head 3 to simultaneously output cross-linked prepolymer and aqueous solution, so that the aqueous solution can coat the cross-linked prepolymer inside, and after soaking in the first solution, a core-shell fiber is formed with hydrogel as the outer shell structure and cross-linked polymer fiber 5 as the core structure. It should be noted that the ring-shaped output terminal does not specifically refer to a circular ring-shaped output terminal. It can also be a polygonal ring structure, an irregular ring structure, etc. This embodiment does not impose any restrictions on this.

[0047] Optionally, the number of coaxial spinning heads 3 can be multiple, thereby enabling the production of multiple cross-linked polymer fibers 5 and improving production efficiency.

[0048] In this embodiment, the first preset speed allows the aqueous solution to react completely with the first liquid in the first receiving cavity 11 to form a hydrogel. Simultaneously, the temperature of the first liquid allows the cross-linked prepolymer encapsulated by the hydrogel to completely form cross-linked polymer fibers 5 within the first receiving cavity 11. The second preset speed allows the hydrogel to completely dissolve in the second liquid within the second receiving cavity 21, causing the hydrogel to detach from the outer surface of the cross-linked polymer fibers 5, facilitating collection of the cross-linked polymer fibers 5 by the collecting roller 4.

[0049] In this embodiment, "prepolymer" refers to a substance formed by the preliminary polymerization of monomers. It is a polymer with a low molecular weight whose degree of polymerization is between that of the monomer and the final polymer. It usually refers to the polymer in the stage before the preparation of the final polymer.

[0050] In a preferred embodiment, a cleaning device and a heating device are also provided at the output end of the second accommodating component. The cleaning device can be a nozzle connected to a water source, which can spray and rinse the cross-linked polymer fibers 5 output from the second accommodating cavity 21 to further clean the residual hydrogel structure or second solution on the outer surface of the cross-linked polymer fibers 5; the heating device can be a hot air blower or a heating plate, and the cleaned cross-linked polymer fibers 5 are dried by the heating device and then wound onto the collecting roller 4 to complete the collection of the cross-linked polymer fibers 5. It should be noted that the drying temperature of the heating device does not exceed the melting or pyrolysis temperature of the cross-linked polymer fibers 5.

[0051] In a preferred embodiment, the collecting roller 4 can be a cylindrical electrically rotating component with its cylindrical shaft as the rotation axis. While collecting the cross-linked polymer fibers 5, the collecting roller 4 also pulls the cross-linked polymer fibers 5, thereby achieving continuous movement of the cross-linked polymer fibers 5 within the first accommodating cavity 11 and the second accommodating cavity 21, and realizing the mass production of the cross-linked polymer fibers 5. Optionally, the collecting roller 4 can be directly heated or a heating element can be fitted onto the outer surface of the collecting roller 4 to increase the outer surface temperature of the collecting roller 4, facilitating the drying of the cross-linked polymer fibers 5.

[0052] This embodiment utilizes the first liquid in the first accommodating cavity 11 and the second liquid in the second accommodating cavity 21 to realize the formation of cross-linked prepolymer to cross-linked polymer fiber 5. Simultaneously, the steps of aqueous solution to hydrogel and then dissolving hydrogel are carried out, which can realize a continuous and efficient cross-linked polymer fiber production process, greatly improve production efficiency and controllability, reduce material consumption, save time and labor costs, and promote the mass production and application of cross-linked polymer fiber 5.

[0053] In some embodiments, the first accommodating assembly further includes a first accommodating member 1 and a first heating member, the first accommodating member 1 having a first accommodating cavity 11; the first heating member is connected to the first accommodating member 1 and is used to heat the first liquid; the second accommodating assembly further includes a second accommodating member 2 and a second heating member, the second accommodating member 2 having a second accommodating cavity 21; the second heating member is connected to the second accommodating member 2 and is used to heat the second liquid.

[0054] In this embodiment, the first accommodating member 1 can be a rectangular groove or a ring structure as described later, and the first accommodating cavity 11 is a cavity on the first accommodating member 1 for holding the first liquid. The connection between the first heating element and the first accommodating member 1 can take many forms. For example, when the first accommodating member 1 is made of a material that conducts electricity and then heats up, the first heating element can be a conductive cable, and the first heating element can be directly connected to the first accommodating member 1 to heat the first accommodating member 1 and realize the heating function of the first liquid in the first accommodating cavity 11; or, for example, the first heating element can be a heating plate or a heating coil, and the first heating element can be attached to the first accommodating member 1 to transfer heat from the first accommodating member 1 to the first liquid in the first accommodating cavity 11. The first heating element can also be directly disposed in the first accommodating cavity 11 to realize the heat transfer between the first liquid and the first heating element.

[0055] In this embodiment, the second accommodating member 2 can be a rectangular groove or a ring structure as described later. The second accommodating cavity 21 is a cavity on the second accommodating member 2 used to hold the second liquid. The connection between the second heating element and the second accommodating member 2 can take various forms. For example, when the second accommodating member 2 is made of a material that generates heat after conduction, the second heating element can be a conductive cable. The second heating element is directly connected to the second accommodating member 2 to heat the second accommodating member 2 and realize the heating function of the second liquid in the second accommodating cavity 21. For another example, the second heating element can be a heating plate or a heating coil. The second heating element can be attached to the second accommodating member 2 to transfer heat from the second accommodating member 2 to the second liquid in the second accommodating cavity 21. The second heating element can also be directly placed in the second accommodating cavity 21 to realize the heat transfer between the second liquid and the second heating element.

[0056] The first and second heating elements shown in this embodiment can increase the temperature of the first and second liquids, accelerate the change rate of the aqueous solution and the cross-linked prepolymer in the first solution, and accelerate the dissolution rate of the hydrogel in the second solution, thereby improving the production efficiency of the cross-linked polymer fiber 5.

[0057] Please see Figure 3 In some embodiments, the first receiving member 1 includes a first base 14, a first annular wall 12, and a second annular wall 13. The first base 14 is capable of rotating at a first preset rotation speed. The first annular wall 12 is disposed on the first base 14. The second annular wall 13 is disposed on the first base 14 and is coaxially disposed with the first annular wall 12. The diameter of the second annular wall 13 is larger than the diameter of the first annular wall 12. A first receiving cavity 11 is formed between the first annular wall 12 and the second annular wall 13.

[0058] The second receiving member 2 includes a second base 24, a third annular wall 22, and a fourth annular wall 23. The second base 24 is capable of rotating at a second preset rotation speed. The third annular wall 22 is disposed on the second base 24. The fourth annular wall 23 is disposed on the second base 24 and is coaxially disposed with the third annular wall 22. The diameter of the fourth annular wall 23 is larger than the diameter of the third annular wall 22. A second receiving cavity 21 is formed between the third annular wall 22 and the fourth annular wall 23.

[0059] In this embodiment, the first annular wall 12 and the second annular wall 13 are coaxially disposed on the first base 14. The first base 14 can be connected to a drive device with a rotation function, enabling the first base 14 to rotate at a first preset rotation speed. The diameter of the second annular wall 13 is larger than the diameter of the first annular wall 12, thus forming a first accommodating cavity 11 with a circular structure between the second annular wall 13 and the first annular wall 12. It should be noted that the first preset speed is different from the first preset rotation speed. The first preset speed refers to the speed at which the coaxial spinning head 3 inputs the aqueous solution and cross-linked prepolymer into the first accommodating cavity 11, while the first preset rotation speed refers to the rotation speed of the first base 14. Similarly, the second preset speed is different from the second preset rotation speed. The second preset speed refers to the flow speed of the core-shell fiber in the second accommodating cavity 21, while the second preset rotation speed refers to the rotation speed of the second base 24. All subsequent descriptions shall be based on this.

[0060] It should be noted that when the first accommodating cavity 11 is annular, the first preset speed is the same as the first preset rotation speed. That is, the coaxial spinning head 3 should be set along the tangential direction of the circumference of the first accommodating cavity 11. This facilitates the cross-linked prepolymer and the aqueous solution to maintain a relatively static state with the flowing liquid during output, thus forming a macroscopic circular winding effect within the first accommodating cavity 11. Furthermore, by controlling the first preset speed, it is possible to ensure that when the aqueous solution and the cross-linked prepolymer completely form core-shell fibers, they are wound around once within the first accommodating cavity 11, and the core-shell fibers are output from the first accommodating cavity 11.

[0061] In this embodiment, the third annular wall 22 and the fourth annular wall 23 are coaxially disposed on the second base 24. The second base 24 can be connected to a drive device with a rotation function, so that the second base 24 can rotate at a second preset rotation speed. The diameter of the fourth annular wall 23 is larger than the diameter of the third annular wall 22, so a second accommodating cavity 21 with a circular structure is formed between the fourth annular wall 23 and the third annular wall 22.

[0062] It should be noted that when the second accommodating cavity 21 is annular, the second preset speed is the same as the second preset rotation speed. The core-shell fiber output from the first accommodating cavity 11 should be input into the second accommodating cavity 21 along the tangential direction of the circumferential rotation of the second accommodating cavity 21. This facilitates the core-shell fiber being subjected to the flow of the second liquid, allowing the core-shell fiber to maintain a relatively static state with the flowing second liquid, thus forming a macroscopic effect of circular winding within the second accommodating cavity 21. Furthermore, by controlling the second preset speed, it is possible to ensure that when the hydrogel shell of the core-shell fiber completely dissolves, it is precisely wound once within the second accommodating cavity 21, and the cross-linked polymer fiber 5 is output from the second accommodating cavity 21.

[0063] In some embodiments, the first preset rotational speed is represented by formula (1), which is as follows:

[0064]

[0065] In formula (1), Q S Q is the flow rate of the aqueous solution. C D represents the flow rate of the cross-linked prepolymer. F D1 is the initial diameter of the core-shell fiber, D2 is the diameter of the first ring wall 12, D2 is the diameter of the second ring wall 13, and R1 is the rotational speed of the first base 14.

[0066] The second preset rotational speed is expressed by formula (2), which is as follows:

[0067]

[0068] In formula (2), D3 is the diameter of the third ring wall 22, D4 is the diameter of the fourth ring wall 23, and R2 is the rotational speed of the second base 24.

[0069] In some embodiments, the temperature range of the first heating element when heating the first liquid and / or the second heating element when heating the second liquid is 40°C-95°C.

[0070] In some embodiments, the movable length of the core-shell fiber in the first accommodating cavity 11 and the first preset speed are represented by formula (3), which is as follows:

[0071] L1≥v1·t1;

[0072] In formula (3), L1 is the movable length of the core-shell fiber in the first accommodating cavity 11, v1 is the first preset speed, and t1 is the time required for the cross-linked prepolymer to be completely cross-linked.

[0073] The movable length of the core-shell fiber in the second accommodating cavity 21 and the diameter of the core-shell fiber are expressed by formula (4), which is as follows:

[0074] L2≥v2·t2;

[0075] In formula (4), L2 is the movable length of the core-shell fiber in the second accommodating cavity 21, v2 is the second preset speed, and t2 is the time required for the hydrogel shell to dissolve.

[0076] Please see Figures 1 to 3 In some embodiments, the system further includes a first conveying assembly and a second conveying assembly. The first conveying assembly includes a plurality of first conveying rollers 6, a portion of which are disposed within the first receiving cavity 11, and another portion of which are disposed between the first receiving cavity 11 and the second receiving cavity 21. The first conveying rollers 6 are used to rotate at a third preset rotational speed to adjust the conveying direction and speed of the core-shell fibers. The second conveying assembly includes a plurality of second conveying rollers 7, a portion of which are disposed within the second receiving cavity 21, and another portion of which are disposed between the second receiving cavity 21 and the collecting roller 4. The second conveying rollers 7 are used to rotate at a fourth preset rotational speed to adjust the conveying direction and speed of the cross-linked polymer fibers 5.

[0077] In this embodiment, the first conveying component is used to adjust the conveying direction and conveying speed of the core-shell fiber in the first accommodating cavity 11, and the second conveying component is used to adjust the conveying direction and conveying speed of the core-shell fiber and the cross-linked polymer fiber 5 in the second accommodating cavity 21. The first conveying roller 6 and the second conveying roller 7 can be conveying rollers of the same type or the same size.

[0078] It should be noted that the distribution of the first conveyor rollers 6 can be as follows: Figure 1 and Figure 3 As shown, preferably, when the first accommodating cavity 11 and the second accommodating cavity 21 are spatially adjacent, a portion of the conveying rollers can also be disposed between the first accommodating cavity 11 and the second accommodating cavity 21 to facilitate the conveying of the core-shell fiber into the second accommodating cavity 21. The distribution of the second conveying rollers 7 can be as follows: Figure 2 and Figure 3 As shown, preferably, when the collecting roller 4 and the second accommodating cavity 21 are arranged adjacent to each other in space, a portion of the second conveying roller 7 can also be arranged between the second accommodating cavity 21 and the collecting roller 4, so as to facilitate the conveying of the cross-linked polymer fiber 5 to the collecting roller 4.

[0079] Specifically, the cylindrical surfaces of the first conveyor roller 6 and / or the second conveyor roller 7 can have a certain curvature. Taking the first conveyor roller 6 as an example, the radial cross-sectional diameter near the center point of the first conveyor roller 6 is smaller, while the radial cross-sectional diameter near both ends of the first conveyor roller 6 is larger. This design ensures that the core-shell fibers are always positioned in the central region corresponding to the center point of the first conveyor roller 6 during transport, facilitating collection. Preferably, the cylindrical surfaces of the first conveyor roller 6 and / or the second conveyor roller 7 can be frosted or elastic plastic surfaces, which helps to increase the friction between the first conveyor roller 6 and the core-shell fibers during transport, and also helps to increase the friction between the second conveyor roller 7 and the cross-linked polymer fibers 5 or the core-shell fibers during transport.

[0080] Preferably, the first conveying roller 6, the second conveying roller 7 and the collecting roller 4 rotate at the same speed, that is, the third preset rotation speed and the fourth preset rotation speed are the same and consistent with the rotation speed of the collecting roller 4, so as to facilitate the uniform transmission of the core-shell fiber and the cross-linked polymer fiber 5 during the transmission process.

[0081] In some embodiments, the third preset rotational speed is the same as the fourth preset rotational speed, the diameter of the first conveying roller 6 is the same as the diameter of the second conveying roller 7, and the third preset rotational speed or the fourth preset rotational speed is expressed by formula (5), which is as follows:

[0082]

[0083] In formula (5), D5 is the diameter of the first conveyor roller 6, and R3 is the third preset rotational speed or the fourth preset rotational speed.

[0084] In some embodiments, the collecting roller 4 collects the cross-linked polymer fibers 5 at a fifth preset rotation speed, which is expressed by formula (6), as follows:

[0085]

[0086] In formula (6), D6 is the diameter of the collecting roller 4, and R4 is the fifth preset rotation speed.

[0087] In some embodiments, the core-shell fiber is output from the first receiving cavity at a third preset speed. The first preset speed, the second preset speed, and the third preset speed are equal and equal to the moving speed of the fiber on the conveying roller and the collecting roller. The above relationship is expressed by formula (7), which is as follows:

[0088]

[0089] In formula (7), v3 is the third preset speed and D7 is the diameter of the cross-linked polymer fiber.

[0090] It should be noted that after the core-shell fiber dissolves the hydrogel shell in the second accommodating cavity, the cross-linked polymer fiber is output from the second accommodating cavity at a third preset speed.

[0091] In some embodiments, the crosslinked prepolymer is at least one of polydimethylsiloxane, Ecoflex, neutral silicone, AB type epoxy resin, AB type polyurethane, and hygroscopic crosslinked one-component polyurethane; the dissolved substance in the aqueous solution is sodium alginate or potassium alginate, with a mass concentration of 0.2% to 5%; and / or, the dissolved substance in the first solution is one of soluble divalent calcium salt, divalent barium salt, divalent strontium salt, trivalent aluminum salt, and trivalent iron salt, with a mass concentration of 0.2% to 20%; and / or, the dissolved substance in the second solution is one of citrate, nitrate, phosphate, hypochlorite, dilute hydrochloric acid, dilute sulfuric acid, and ethylenediaminetetraacetic acid, with a mass concentration of 0.5% to 20%.

[0092] In the above technical solution, the spinning collection device includes a coaxial spinning head 3, a first accommodating cavity, a second accommodating component, and a collecting roller 4. The first accommodating component includes a first accommodating cavity 11, which contains a first liquid. The second accommodating component includes a second accommodating cavity 21, which contains a second liquid. The coaxial spinning head 3 is immersed in the first liquid. The coaxial spinning head 3 can output an aqueous solution to encapsulate the cross-linked prepolymer to form a fiber structure. The cross-linked prepolymer forms a cross-linked polymer fiber 5 in the first liquid. The aqueous solution forms a hydrogel in the first liquid. The cross-linked polymer fiber 5 is encapsulated in the hydrogel to form a core-shell fiber. The second liquid dissolves the hydrogel shell structure of the core-shell fiber, leaving the cross-linked polymer fiber 5 separately. The collecting roller 4 then collects the cross-linked polymer fiber 5. This technical solution utilizes the first liquid in the first accommodating cavity 11 and the second liquid in the second accommodating cavity 21 to realize the formation of cross-linked prepolymer to cross-linked polymer fiber 5, and simultaneously performs the steps of aqueous solution to hydrogel and then dissolving hydrogel. This can realize a continuous and efficient cross-linked polymer fiber production process, greatly improve production efficiency and controllability, reduce material consumption, save time and labor costs, and promote the mass production and application of cross-linked polymer fiber 5.

[0093] The following four examples of collecting wet-spun fibers provide a further understanding of the above-mentioned collection device and collection method:

[0094] First collection embodiment:

[0095] Step 1: Prepare a rectangular first receiving cavity 11 water tank with a length of 5m, a width of 20cm, and a depth of 10cm, and a rectangular second receiving cavity 21 with a length of 5m, a width of 20cm, and a depth of 10cm; prepare several cylindrical first conveying rollers 6 and / or second conveying rollers 7 with a diameter of 5cm, and a cylindrical collecting roller 4 with a diameter of 15cm.

[0096] Step 2: Inject a 3% calcium chloride aqueous solution into the first accommodating cavity 11 and heat it at the bottom to raise the temperature to 90°C; Inject a 5% sodium citrate aqueous solution into the second accommodating cavity 21 and heat it at the bottom to raise the temperature to 90°C.

[0097] Step 3: Immerse the coaxial spinning head 3 (inner diameter of 0.4 mm and outer diameter of 1.15 mm) below the liquid surface in the first accommodating cavity 11. Extrude polydimethylsiloxane (Dow Corning, Sylgard 184) prepolymer through the inner spinning head at a speed of 30 mL / h, and extrude a 1.5% sodium alginate aqueous solution through the outer spinning head at a speed of 20 mL / h. The fiber is then sequentially drawn and laid through the first accommodating cavity 11, the second accommodating cavity 21, and each of the first conveying rollers 6 and / or the second conveying rollers 7, finally reaching the collecting roller 4. Adjust the rotation speed of the first conveying rollers 6 and / or the second conveying rollers 7 to 3.45 RPM, and the rotation speed of the collecting roller 4 to 1.15 RPM.

[0098] Step 4: Place a container between the second accommodating cavity 21 and the collecting roller 4, fill it with deionized water, and the suspended fibers can be pulled through the water surface to wash away the soluble substances on the fiber surface. At the same time, the collecting roller 4 is heated and the moisture on the fiber surface is dried after collection, so that the continuous preparation of PDMS fibers with a diameter of about 1.1 mm can be achieved.

[0099] Second collection embodiment:

[0100] Step 1: Prepare a first annular cavity 11 with an outer diameter of 3m, an inner diameter of 2.5m, and a depth of 10cm, and a second annular cavity 21 with an outer diameter of 3m, an inner diameter of 2.5m, and a depth of 10cm; prepare several cylindrical first conveying rollers 6 and / or second conveying rollers 7 with a diameter of 6cm, and a cylindrical collecting roller 4 with a diameter of 20cm.

[0101] Step 2: Inject a 3% copper sulfate solution into the first accommodating cavity 11 and heat the bottom to raise the temperature to 80°C; Inject a 5% EDTA (ethylenediaminetetraacetic acid) solution into the second accommodating cavity 21 and heat the bottom to raise the temperature to 50°C.

[0102] Step 3: Immerse the coaxial spinning head 3 (inner diameter of 1.16 mm and outer diameter of 2.2 mm) below the liquid surface in the first receiving cavity 11. Extrude Ecoflex (Smooth-on) prepolymer through the inner spinning head at a speed of 40 mL / h, and extrude a 1.5% sodium alginate aqueous solution through the outer spinning head at a speed of 26 mL / h. Continuously draw and lay the fiber through the first receiving cavity 11, the second receiving cavity 21, and each of the first conveying rollers 6 and / or the second conveying rollers 7, finally reaching the collecting roller 4. Adjust the rotation speed of the first conveying rollers 6 and / or the second conveying rollers 7 to 5.5 RPM, the rotation speed of the collecting roller 4 to 1.65 RPM, and the rotation speed of the annular first receiving cavity 11 and the second receiving cavity 21 to 0.12 RPM.

[0103] Step 4: Place a container between the second accommodating cavity 21 and the collecting roller 4, fill it with deionized water, and the suspended fibers can be pulled through the water surface to wash away the soluble substances on the fiber surface. At the same time, the collecting roller 4 is heated and the moisture on the fiber surface is dried after collection, so that Ecoflex fibers with a diameter of about 2mm can be continuously produced.

[0104] Third collection embodiment:

[0105] Step 1: Prepare a rectangular first receiving cavity 11 with a length of 6m, a width of 15cm, and a depth of 6cm, and an annular second receiving cavity 21 with an outer wall diameter of 2m, an inner wall diameter of 1.6m, and a depth of 10cm; prepare several cylindrical first conveying rollers 6 and / or second conveying rollers 7 with a diameter of 4cm, and a cylindrical collecting roller 4 with a diameter of 12cm.

[0106] Step 2: Inject a 4% barium chloride solution into the first accommodating cavity 11 and heat it at the bottom to raise the temperature to 80°C; inject a 5% dilute hydrochloric acid solution into the second accommodating cavity 21.

[0107] Step 3: Immerse the coaxial spinning head 3 (inner diameter of 2mm and outer diameter of 4mm) below the liquid surface in the first accommodating cavity 11. Extrude polydimethylsiloxane (Dow Corning, SE1700) prepolymer through the inner spinning head at a speed of 100mL / h, and extrude a 1.5% potassium alginate aqueous solution through the outer spinning head at a speed of 68mL / h. Thread the fiber through the first accommodating cavity 11, the second accommodating cavity 21, and each of the first conveying rollers 6 and / or the second conveying rollers 7, finally reaching the collecting roller 4. Adjust the rotation speed of the first conveying rollers 6 and / or the second conveying rollers 7 to 7.1RPM, the rotation speed of the collecting roller 4 to 2.36RPM, and the rotation speed of the annular second accommodating cavity 21 to 0.16RPM.

[0108] Step 4: A deionized water rinsing area is set after the second accommodating cavity 21. The fiber is pulled through the rinsing area by the conveyor shaft to wash away the soluble substances on the fiber surface. At the same time, a hot air drying area is set between the rinsing area and the collecting roller 4 to heat and dry the fiber. Then, it is collected by the roller collector, so that the continuous preparation of PDMS fiber with a diameter of about 2.8 mm can be achieved.

[0109] Fourth collection embodiment:

[0110] Step 1: Prepare an annular first receiving cavity 11 with an outer wall diameter of 3.5m, an inner wall diameter of 3m, and a depth of 10cm, and a rectangular second receiving cavity 21 with a length of 5m, a width of 20cm, and a depth of 10cm; prepare several cylindrical first conveying rollers 6 and / or second conveying rollers 7 with a diameter of 5cm, and a cylindrical collecting roller 4 with a diameter of 18cm.

[0111] Step 2: Inject a 3% strontium chloride aqueous solution into the first accommodating cavity 11 and heat it at the bottom to raise the temperature to 90°C; Inject a 5% sodium phosphate aqueous solution into the second accommodating cavity 21 and heat it at the bottom to raise the temperature to 90°C.

[0112] Step 3: Immerse the spinning head 3 (inner diameter of 2.2 mm and inner diameter of 3.5 mm) below the liquid surface of the first accommodating cavity 11. Extrude a cross-linked prepolymer of single-component polyurethane (Great Wall, 717) through the inner spinning head at a speed of 60 mL / h. Extrude a 1.5% potassium alginate aqueous solution through the outer spinning head at a speed of 40 mL / h. Sequentially draw and lay the fiber through the first accommodating cavity 11, the second accommodating cavity 21, and each of the first conveying rollers 6 and / or the second conveying rollers 7, finally reaching the collecting roller 4. Adjust the rotation speed of the first conveying rollers 6 and / or the second conveying rollers 7 to 7 RPM, the rotation speed of the collecting roller 4 to 1.74 RPM, and the rotation speed of the annular first accommodating cavity 11 and the second accommodating cavity 21 to 0.04 RPM.

[0113] Step 4: Place a deionized water rinsing area after the second accommodating cavity 21. The fiber is pulled through the rinsing area by the conveyor shaft to wash away the soluble substances on the fiber surface. At the same time, the collecting roller 4 is heated. After collection, the moisture on the fiber surface is dried, so that the continuous preparation of polyurethane fiber with a diameter of about 3.2 mm can be achieved.

[0114] It should be understood that the various forms of processes shown above can be used to reorder, add, or delete steps. For example, the steps described in this invention disclosure can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution disclosed in this invention can be achieved, and this is not limited herein.

[0115] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A spinning and collecting device for cross-linked polymer fibers, characterized in that, include: A coaxial spinning head includes an annular output end and an axial output end. The annular output end is sleeved outside the axial output end. The annular output end is used to output an aqueous solution, and the axial output end is used to output a crosslinked prepolymer. The aqueous solution coats the crosslinked prepolymer. A first accommodating component includes a first accommodating cavity containing a first liquid. The output end of the coaxial spinning head is immersed in the first liquid and passes through the first accommodating cavity at a first preset speed. The first liquid is used to react the aqueous solution to form a hydrogel shell and to crosslink the crosslinked prepolymer to form fibers. The hydrogel shell and the crosslinked polymer fibers form a core-shell fiber. The first accommodating component also includes a first accommodating element, which includes: a first base capable of rotating at a first preset rotational speed; a first annular wall disposed on the first base; and a second annular wall disposed on the first base and coaxially disposed with the first annular wall. The diameter of the second annular wall is larger than the diameter of the first annular wall. The first accommodating cavity is formed between the first annular wall and the second annular wall. The first preset speed causes the aqueous solution to completely form a hydrogel after reacting with the first liquid in the first accommodating cavity. At the same time, the temperature of the first liquid causes the crosslinked prepolymer encapsulated by the hydrogel to completely form crosslinked polymer fibers in the first accommodating cavity. The crosslinked prepolymer and the aqueous solution remain relatively stationary with the flowing first liquid. A second receiving assembly, disposed adjacent to the first receiving assembly, includes a second receiving cavity containing a second liquid. The core-shell fiber is immersed in the second liquid and passes through the second receiving cavity at a second preset speed. The second liquid is used to dissolve the hydrogel shell outside the cross-linked polymer fiber. The second receiving assembly also includes a second receiving element, which includes: a second base capable of rotating at a second preset rotation speed; a third annular wall disposed on the second base; and a fourth annular wall disposed on the second base and coaxially disposed with the third annular wall. The diameter of the fourth annular wall is larger than the diameter of the third annular wall. The second receiving cavity is formed between the third annular wall and the fourth annular wall. The second preset speed ensures that the hydrogel is completely dissolved in the second liquid within the second receiving cavity, and the core-shell fiber remains relatively stationary with the flowing second liquid. The first conveying assembly includes a plurality of first conveying rollers, a portion of which are disposed within the first receiving cavity, and another portion of which are disposed between the first receiving cavity and the second receiving cavity; the first conveying rollers located within the first receiving cavity are located at the end of the first receiving cavity from which the core-shell fiber is output, and the first conveying rollers located within the first receiving cavity are used to convey the core-shell fiber out of the first receiving cavity. The second conveying assembly includes a plurality of second conveying rollers, a portion of which are disposed within the second receiving cavity, and another portion of which are disposed between the second receiving cavity and the collecting roller. A collecting roller for collecting the cross-linked polymer fibers output from the second accommodating cavity; The core-shell fiber is output from the first receiving cavity at a third preset speed. The first preset speed, the second preset speed, and the third preset speed are equal and equal to the movement speed of the fiber on the conveying roller and the collecting roller. The movable length of the core-shell fiber in the first accommodating cavity and the first preset speed are expressed by formula (3), which is as follows: ； In formula (3), The movable length of the core-shell fiber within the first accommodating cavity. For the first preset speed, The time required for complete crosslinking of the crosslinked prepolymer; The movable length of the core-shell fiber in the second accommodating cavity and the second preset speed are expressed by formula (4), which is as follows: ； In formula (4), The movable length of the core-shell fiber within the second accommodating cavity. The second preset speed, The time required for the hydrogel shell to dissolve; The first preset rotation speed is expressed by formula (1), which is as follows: ； In formula (1), The flow rate of the aqueous solution is... The flow rate of the cross-linked prepolymer, The initial diameter of the core-shell fiber is given. The diameter of the first annular wall is denoted as . The diameter of the second ring wall is denoted as . The rotational speed of the first base; The second preset rotation speed is expressed by formula (2), which is as follows: ； In formula (2), The diameter of the third ring wall is... The diameter of the fourth ring wall is... The rotational speed of the second base; The first conveying roller is used to rotate at a third preset rotation speed to adjust the conveying direction and conveying speed of the core-shell fiber; The second conveying roller is used to rotate at a fourth preset rotation speed to adjust the conveying direction and conveying speed of the cross-linked polymer fiber; The third preset rotational speed is the same as the fourth preset rotational speed, the diameter of the first conveyor roller is the same as the diameter of the second conveyor roller, and the third preset rotational speed or the fourth preset rotational speed is expressed by formula (5), which is as follows: ； In formula (5), The diameter of the first conveyor roller is [missing information]. The third preset rotation speed and the fourth preset rotation speed; The collecting roller collects the cross-linked polymer fibers at a fifth preset rotation speed, which is expressed by formula (6), as follows: ； In formula (6), The diameter of the collecting roller, The fifth preset rotation speed.

2. The spinning and collecting device for cross-linked polymer fibers according to claim 1, characterized in that, The first accommodating component further includes: A first heating element is connected to the first accommodating element, and the first heating element is used to heat the first liquid; The second accommodating component further includes: The second heating element is connected to the second accommodating element and is used to heat the second liquid.

3. The spinning and collecting device for cross-linked polymer fibers according to claim 2, characterized in that, The temperature range of the first heating element when heating the first liquid and / or the second heating element when heating the second liquid is 40℃-95℃.

4. The spinning and collecting device for cross-linked polymer fibers according to claim 1, characterized in that, The core-shell fiber is output from the first receiving cavity at a third preset speed. The first preset speed, the second preset speed, and the third preset speed are equal and equal to the movement speed of the fiber on the first conveying roller, the second conveying roller, and the collecting roller. The above relationship is expressed by formula (7), which is as follows: ; In formula (7), The third preset speed, The diameter is that of the cross-linked polymer fiber.

5. The spinning and collecting device for cross-linked polymer fibers according to claim 1, characterized in that, The cross-linked prepolymer is at least one of polydimethylsiloxane, silicone, neutral silicone, AB type epoxy resin, AB type polyurethane, and hygroscopic cross-linked single-component polyurethane; The dissolved substance in the aqueous solution is sodium alginate or potassium alginate, and the mass concentration of sodium alginate or potassium alginate is 0.2%~5%; And / or, the dissolved substance in the first liquid is one of a soluble divalent calcium salt, divalent barium salt, divalent strontium salt, trivalent aluminum salt, or trivalent iron salt, and the mass concentration of the dissolved substance in the first liquid is 0.2% to 20%; And / or, the dissolved substance in the second liquid is one of citrate, nitrate, phosphate, hypochlorite, dilute hydrochloric acid, dilute sulfuric acid, or ethylenediaminetetraacetic acid, and the mass concentration of the dissolved substance in the second liquid is 0.5% to 20%.

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