CN113073394B - Thermal driving type twisted artificial muscle composite fiber and preparation method thereof - Google Patents
Thermal driving type twisted artificial muscle composite fiber and preparation method thereof Download PDFInfo
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- CN113073394B CN113073394B CN202110334306.0A CN202110334306A CN113073394B CN 113073394 B CN113073394 B CN 113073394B CN 202110334306 A CN202110334306 A CN 202110334306A CN 113073394 B CN113073394 B CN 113073394B
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- 239000000835 fiber Substances 0.000 title claims abstract description 74
- 239000002131 composite material Substances 0.000 title claims abstract description 72
- 210000003205 muscle Anatomy 0.000 title claims abstract description 32
- 238000002360 preparation method Methods 0.000 title claims abstract description 8
- 239000005038 ethylene vinyl acetate Substances 0.000 claims abstract description 44
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims abstract description 44
- XKMZOFXGLBYJLS-UHFFFAOYSA-L zinc;prop-2-enoate Chemical compound [Zn+2].[O-]C(=O)C=C.[O-]C(=O)C=C XKMZOFXGLBYJLS-UHFFFAOYSA-L 0.000 claims abstract description 35
- 238000000034 method Methods 0.000 claims abstract description 6
- 238000009998 heat setting Methods 0.000 claims abstract description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 14
- 238000002074 melt spinning Methods 0.000 claims description 7
- 229910052757 nitrogen Inorganic materials 0.000 claims description 7
- KOMNUTZXSVSERR-UHFFFAOYSA-N 1,3,5-tris(prop-2-enyl)-1,3,5-triazinane-2,4,6-trione Chemical group C=CCN1C(=O)N(CC=C)C(=O)N(CC=C)C1=O KOMNUTZXSVSERR-UHFFFAOYSA-N 0.000 claims description 5
- MQIUGAXCHLFZKX-UHFFFAOYSA-N Di-n-octyl phthalate Natural products CCCCCCCCOC(=O)C1=CC=CC=C1C(=O)OCCCCCCCC MQIUGAXCHLFZKX-UHFFFAOYSA-N 0.000 claims description 5
- 235000021355 Stearic acid Nutrition 0.000 claims description 5
- RWCCWEUUXYIKHB-UHFFFAOYSA-N benzophenone Chemical group C=1C=CC=CC=1C(=O)C1=CC=CC=C1 RWCCWEUUXYIKHB-UHFFFAOYSA-N 0.000 claims description 5
- 239000012965 benzophenone Substances 0.000 claims description 5
- BJQHLKABXJIVAM-UHFFFAOYSA-N bis(2-ethylhexyl) phthalate Chemical group CCCCC(CC)COC(=O)C1=CC=CC=C1C(=O)OCC(CC)CCCC BJQHLKABXJIVAM-UHFFFAOYSA-N 0.000 claims description 5
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical group CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 5
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims description 5
- 239000008117 stearic acid Substances 0.000 claims description 5
- 239000003431 cross linking reagent Substances 0.000 claims description 4
- 239000003999 initiator Substances 0.000 claims description 4
- 239000004014 plasticizer Substances 0.000 claims description 4
- 238000007493 shaping process Methods 0.000 claims description 4
- 239000004094 surface-active agent Substances 0.000 claims description 4
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 claims description 2
- 238000001816 cooling Methods 0.000 claims description 2
- 238000001035 drying Methods 0.000 claims description 2
- 238000002844 melting Methods 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims description 2
- PIMBTRGLTHJJRV-UHFFFAOYSA-L zinc;2-methylprop-2-enoate Chemical group [Zn+2].CC(=C)C([O-])=O.CC(=C)C([O-])=O PIMBTRGLTHJJRV-UHFFFAOYSA-L 0.000 claims description 2
- 150000001875 compounds Chemical class 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 claims 1
- 230000008018 melting Effects 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 7
- 230000000638 stimulation Effects 0.000 abstract description 3
- 238000013329 compounding Methods 0.000 abstract description 2
- 230000008602 contraction Effects 0.000 abstract description 2
- 239000002994 raw material Substances 0.000 abstract description 2
- 238000011084 recovery Methods 0.000 description 6
- 238000004132 cross linking Methods 0.000 description 5
- 238000012360 testing method Methods 0.000 description 4
- 230000003446 memory effect Effects 0.000 description 3
- 229920000431 shape-memory polymer Polymers 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 230000000930 thermomechanical effect Effects 0.000 description 2
- 230000006399 behavior Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000011246 composite particle Substances 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000005469 granulation Methods 0.000 description 1
- 230000003179 granulation Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 210000001087 myotubule Anatomy 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 230000036544 posture Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/44—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds as major constituent with other polymers or low-molecular-weight compounds
- D01F6/46—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds as major constituent with other polymers or low-molecular-weight compounds of polyolefins
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F1/00—General methods for the manufacture of artificial filaments or the like
- D01F1/02—Addition of substances to the spinning solution or to the melt
- D01F1/10—Other agents for modifying properties
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H13/00—Other common constructional features, details or accessories
- D01H13/28—Heating or cooling arrangements for yarns
-
- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
- D02G3/02—Yarns or threads characterised by the material or by the materials from which they are made
-
- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
- D02G3/44—Yarns or threads characterised by the purpose for which they are designed
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M10/00—Physical treatment of fibres, threads, yarns, fabrics, or fibrous goods made from such materials, e.g. ultrasonic, corona discharge, irradiation, electric currents, or magnetic fields; Physical treatment combined with treatment with chemical compounds or elements
- D06M10/001—Treatment with visible light, infrared or ultraviolet, X-rays
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M2101/00—Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
- D06M2101/16—Synthetic fibres, other than mineral fibres
- D06M2101/18—Synthetic fibres consisting of macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D06M2101/20—Polyalkenes, polymers or copolymers of compounds with alkenyl groups bonded to aromatic groups
-
- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2321/00—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D10B2321/02—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds polyolefins
- D10B2321/021—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds polyolefins polyethylene
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials For Medical Uses (AREA)
- Multicomponent Fibers (AREA)
Abstract
The invention belongs to the technical field of material science and flexible driving, and particularly relates to a heat-driven twisted artificial muscle composite fiber and a preparation method thereof. The invention provides a method for preparing twisted artificial muscle by compounding zinc acrylate and ethylene-vinyl acetate copolymer, which is characterized in that zinc acrylate and ethylene-vinyl acetate copolymer are compounded to form a multiple cross-linked network to enhance the thermal mechanical property and the two-way shape memory property of ethylene-vinyl acetate copolymer fiber, and the twisting and heat setting are further adopted to prepare the heat-driven ethylene-vinyl acetate copolymer artificial muscle composite fiber, so that the aims of quick rotation and contraction driving are fulfilled in a heat stimulation manner. The method is simple to operate, low in cost, efficient and environment-friendly, and has wide raw material sources compared with other artificial muscle materials.
Description
Technical Field
The invention belongs to the technical field of material science and flexible driving, and particularly relates to a heat-driven twisted artificial muscle composite fiber and a preparation method thereof.
Background
The artificial muscle fiber is a novel fibrous flexible driving material which can generate mechanical displacement or output force under external stimulation (heat, electricity, light, magnetic field, humidity and the like) and drive a target object to generate motion postures such as contraction, elongation, bending, torsion and rotation. The fibrous artificial muscle has the advantages of excellent mechanical strength, good structural flexibility, rich designability and the like, is expected to replace the traditional rigid driver, and has good application prospect in the fields of biological medicine auxiliary systems, soft robots, flexible mechanical equipment, flexible sensors and the like.
The shape memory polymer is an intelligent response type high molecular material, and has a shape memory effect under the external stimulation. Ethylene-vinyl acetate copolymer (EVA) is a common material for making shape memory polymers, and its temperature of thermal stimulus response varies with VA content. Currently, the two-way shape memory effect, i.e., the reversible change in thermally-driven strain (or stress), has been achieved using the crystallization-melting transition of chemically crosslinked EVA. However, the shape memory polymer of chemically crosslinked EVA still has the disadvantages of low mechanical properties, unstable thermo-mechanical properties, significant stress relaxation effect, and low recovery stress.
Disclosure of Invention
The invention mainly solves the technical problems that: aiming at the problems of low mechanical property and unstable thermal mechanical property of the current shape memory EVA fiber material, zinc acrylate is used as a reactive filler, the molecular structure of the zinc acrylate comprises two unsaturated vinyl groups, and the zinc acrylate is easy to form nano or micron-sized aggregates through self-polymerization, can form stable chemical combination and good interface combination with an EVA matrix, further improves the crosslinking density and the thermal mechanical property of the EVA fiber, and is used for designing a thermal driving type twisted artificial muscle composite fiber.
The technical problem mainly solved by the invention is implemented by the following technical scheme:
(1) preparation of zinc acrylate/ethylene-vinyl acetate copolymer complex: adding 100phr of ethylene-vinyl acetate copolymer, 5phr to 10phr of zinc acrylate, 3phr to 5phr of ultraviolet light initiator, 3phr to 5phr of auxiliary crosslinking agent, 5phr to 10phr of surfactant and 1phr to 3phr of plasticizer into an internal mixer or a twin-screw extruder according to a certain proportion, carrying out melt mixing under the protection of nitrogen, cooling and drying the product, and then carrying out granulation and storage. Wherein phr denotes parts by weight.
(2) Preparing the crosslinked zinc acrylate/ethylene-vinyl acetate copolymer composite fiber: and adding the composite particles obtained in the step into a melt spinning machine, carrying out melt spinning under the protection of nitrogen, and preparing the crosslinked composite fiber through ultraviolet curing equipment.
(3) And twisting and shaping the crosslinked zinc acrylate/ethylene-vinyl acetate copolymer composite fiber to obtain the heat-driven twisted artificial muscle composite fiber.
The zinc acrylate is zinc dimethacrylate; the ethylene-vinyl acetate copolymer (EVA) has a vinyl acetate content of 5-40 wt%; the ultraviolet initiator is benzophenone; the auxiliary crosslinking agent is triallyl isocyanurate; the surfactant is stearic acid; the plasticizer is dioctyl phthalate.
The gel mass fraction of the crosslinking composite fiber is between 75 and 90 percent.
Further, step 3 specifically comprises: fixing two ends of the unwound (straightened) cross-linked zinc acrylate/ethylene-vinyl acetate copolymer composite fiber (2 strands or more than 2 strands) on a hand-operated or electric twisting machine for twisting, and then carrying out heat setting on the spiral composite fiber at the temperature of 80-100 ℃ for 2-5 min to obtain the heat-driven twisted artificial muscle composite fiber.
And the twist (turns/m) of the thermal driving type twisted artificial muscle composite fiber is calculated according to the rotating turns (turns) of the twisting machine and the length (m) of the composite fiber.
The thermal driving temperature of the thermal driving type twisted artificial muscle composite fiber is 50-100 ℃.
Compared with the prior art, the preparation method of the heat-driven twisted artificial muscle composite fiber provided by the invention is simple to operate, low in cost, efficient and environment-friendly, and has wide sources of raw materials compared with other artificial muscle materials.
Drawings
FIG. 1(a and b) are respectively a shape memory property curve and a recovery stress curve in an iso-strain mode of a crosslinked zinc acrylate/ethylene-vinyl acetate copolymer composite fiber, and (c) is a recovery stress curve in an iso-strain mode of an ethylene-vinyl acetate copolymer fiber to which zinc acrylate is not added;
FIG. 2 is a photograph of a cross-linked zinc acrylate/ethylene-vinyl acetate copolymer composite fiber twisting-sizing structure;
FIG. 3 is a schematic diagram of the driving behavior of the thermal-driven twisted crosslinked zinc acrylate/ethylene-vinyl acetate copolymer artificial muscle composite fiber;
fig. 4 is a diagram of the maximum driving rotating speed and the twist of the heat-driven twisted artificial muscle composite fiber.
Detailed Description
The invention aims to improve the thermal mechanical property of EVA fibers, enhance the shape memory effect and the recovery stress of the EVA fibers, further improve the capacity of storing and converting external energy of the shape memory EVA fibers in a twisting-shaping mode, and provide a method for preparing a thermal driving type twisted artificial muscle composite fiber by compounding zinc acrylate and an ethylene-vinyl acetate copolymer. Specifically, a zinc acrylate/ethylene-vinyl acetate copolymer composite is prepared, a cross-linked zinc acrylate/ethylene-vinyl acetate copolymer composite fiber is prepared by melt spinning and ultraviolet curing, and then the heat-driven twisted artificial muscle composite fiber is prepared by twisting and shaping. The invention is described in further detail below with reference to the following figures and specific embodiments:
example 1
100g of ethylene-vinyl acetate copolymer, 5g of zinc acrylate, 3g of benzophenone, 3g of triallyl isocyanurate, 5g of stearic acid and 1g of dioctyl phthalate are respectively added into an internal mixer, melted and mixed for 5min at 130 ℃ under the protection of nitrogen, and the mixed product is cooled, dried, granulated and stored.
And adding the mixed zinc acrylate/ethylene-vinyl acetate copolymer composite material into a melt spinning machine to prepare the composite fiber, crosslinking the composite fiber in ultraviolet curing equipment, and finally testing that the gel mass fraction of the crosslinked composite fiber is 78%. With reference to fig. 1(a and b), the crosslinked composite fiber has excellent thermo-mechanical stability and good cycle stability, and the recovery stress of the crosslinked composite fiber at a driving temperature of 80 ℃ in an iso-strain (tensile strain of 5%) mode can reach 2.03 MPa. The recovery stress in the iso-strain mode (tensile strain 5%) of the fiber without zinc acrylate was only 1.57MPa, as shown in fig. 1 (c).
Two strands of cross-linked composite fibers are cut, the length of each cross-linked composite fiber is 300mm, two ends of each cross-linked composite fiber are fixed on a hand-shaking twisting machine and rotate at a constant speed for 150 circles, and then the cross-linked composite fibers are placed in an oven with the temperature of 80 ℃ and are kept for 5min to obtain twisted artificial muscle composite fibers with the twist of 500 turns/m. As shown in fig. 2, the twist increases in sequence, and the spiral structure of the twisted artificial muscle composite fiber is maintained stably.
Example 2
500g of ethylene-vinyl acetate copolymer, 40g of zinc acrylate, 20g of benzophenone, 25g of triallyl isocyanurate, 35g of stearic acid and 10g of dioctyl phthalate are respectively added into an extruder, and are melted, mixed and extruded at 130 ℃ under the protection of nitrogen, and the mixed product is cooled, dried, granulated and stored.
And adding the mixed zinc acrylate/ethylene-vinyl acetate copolymer composite material into a melt spinning machine to prepare the composite fiber, crosslinking the composite fiber in ultraviolet curing equipment, and finally testing that the gel mass fraction of the crosslinked composite fiber is 80%.
Two strands of cross-linked composite fibers are cut, the length of each cross-linked composite fiber is 300mm, two ends of each cross-linked composite fiber are fixed on a hand-operated twisting machine and rotate for 180 circles at a constant speed, and then the cross-linked composite fibers are placed in a 90 ℃ oven and are kept for 3min to obtain twisted artificial muscle composite fibers with the twist of 600 turns/m.
Example 3
1000g of ethylene-vinyl acetate copolymer, 100g of zinc acrylate, 50g of benzophenone, 50g of triallyl isocyanurate, 100g of stearic acid and 30g of dioctyl phthalate were respectively added into an extruder, melt-mixed and extruded at 130 ℃ under the protection of nitrogen, and the mixed product was cooled, dried, granulated and stored.
And adding the mixed zinc acrylate/ethylene-vinyl acetate copolymer composite material into a melt spinning machine to prepare the composite fiber, crosslinking the composite fiber in ultraviolet curing equipment, and finally testing that the gel mass fraction of the crosslinked composite fiber is 85%.
Two strands of cross-linked composite fibers are cut, the length of the cross-linked composite fibers is 200mm, two ends of the cross-linked composite fibers are fixed on a twisting machine and rotate at a constant speed for 140 circles, and then the cross-linked composite fibers are placed in an oven at 100 ℃ and are kept warm for 2min to obtain the twisted artificial muscle composite fibers with the twist degree of 700 turns/m.
Example 4
The thermal driving test was performed on the thermal driving type twisted artificial muscle composite fiber (500-.
The foregoing has outlined rather broadly the preferred embodiments and principles of the present invention and it will be appreciated that those skilled in the art may devise variations of the present invention that are within the spirit and scope of the appended claims.
Claims (5)
1. A preparation method of a thermal driving type twisted artificial muscle composite fiber is characterized by comprising the following steps:
(1) preparation of zinc acrylate/ethylene-vinyl acetate copolymer complex: melting and mixing 100phr of ethylene-vinyl acetate copolymer, 5phr to 10phr of zinc acrylate, 3phr to 5phr of ultraviolet light initiator, 3phr to 5phr of auxiliary crosslinking agent, 5phr to 10phr of surfactant and 1phr to 3phr of plasticizer under the protection of nitrogen, and cooling and drying to obtain a zinc acrylate/ethylene-vinyl acetate copolymer compound;
(2) preparing the crosslinked zinc acrylate/ethylene-vinyl acetate copolymer composite fiber: carrying out melt spinning on the obtained zinc acrylate/ethylene-vinyl acetate copolymer composite under the protection of nitrogen to obtain a crosslinked zinc acrylate/ethylene-vinyl acetate copolymer composite fiber;
(3) twisting and shaping the crosslinked zinc acrylate/ethylene-vinyl acetate copolymer composite fiber to obtain the heat-driven twisted artificial muscle composite fiber.
2. The method for preparing the thermal driving type twisted artificial muscle composite fiber according to claim 1, wherein the zinc acrylate is zinc dimethacrylate; the ethylene-vinyl acetate copolymer has the vinyl acetate content of 5-40 wt%; the ultraviolet initiator is benzophenone; the auxiliary crosslinking agent is triallyl isocyanurate; the surfactant is stearic acid; the plasticizer is dioctyl phthalate.
3. The method for preparing the thermal driving type twisted artificial muscle composite fiber according to claim 1, wherein in the step 2, the gel mass fraction of the crosslinked zinc acrylate/ethylene-vinyl acetate copolymer composite fiber is between 75% and 90%.
4. The method for preparing the thermal driving type twisted artificial muscle composite fiber according to claim 1, wherein the step 3 is specifically as follows: fixing two ends of the unwound crosslinked zinc acrylate/ethylene-vinyl acetate copolymer composite fiber on a hand-operated or electric twisting machine for twisting, and then carrying out heat setting on the spiral composite fiber at the temperature of 80-100 ℃ for 2-5 min to obtain the heat-driven twisted artificial muscle composite fiber.
5. A heat-driven twisted artificial muscle composite fiber obtained by the production method according to any one of claims 1 to 4, wherein the heat-driven temperature of the heat-driven twisted artificial muscle composite fiber is 50 ℃ to 100 ℃.
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