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CN-121992524-A - High-performance intelligent composite fiber material and efficient stable continuous production method thereof

CN121992524ACN 121992524 ACN121992524 ACN 121992524ACN-121992524-A

Abstract

The present disclosure provides a high performance intelligent composite fiber material and a high efficiency stable continuous production method thereof. The production method comprises the steps of premixing a solvent-free liquid crystal oligomer and a thermoplastic polymer elastomer to obtain a solid premix, carrying out hot melting operation on the premix by an extruder, carrying out dynamic light receiving process in the effective irradiation intensity range of 80mW/cm 2 -150mW/cm 2 for 2-5 min, the effective crosslinking density range of 0.15mmol/cm 3 -0.45mmol/cm 3 , the screw rotating speed of 30rpm-150rpm, the crosslinking temperature of 190-210 ℃ and the extrusion temperature of 170-190 ℃ to form primary fibers, and carrying out dynamic hot drawing and heat treatment to obtain the high-performance intelligent composite fiber material. The production method is free from template assistance, realizes efficient, stable and continuous production, is simple to operate, has high efficiency, and has high uniformity, high response and high elastic fatigue resistance of the produced high-performance intelligent composite fiber material.

Inventors

  • ZHENG ZIJIAN
  • ZHANG YUFEI
  • LIU MENGJIAO

Assignees

  • 港理大（惠州）大亚湾技术创新研究院有限公司
  • 香港理工大学

Dates

Publication Date
20260508
Application Date
20260224

Claims (10)

  1. 1. A high-performance intelligent composite fiber material high-efficiency stable continuous production method is characterized in that, Premixing a solvent-free liquid crystal oligomer and a thermoplastic polymer elastomer to obtain a solid premix material, wherein the solvent-free liquid crystal oligomer comprises a liquid crystal monomer, a chain extender, a catalyst, a cross-linking agent and an initiator; carrying out hot melting operation on the premixed material through an extruder, and then carrying out in-situ crosslinking, shearing, curing and extruding operation to form nascent fibers; Wherein the effective irradiation intensity range of the in-situ crosslinking, shearing, curing and extrusion operation is 80mW/cm 2 -150mW/cm 2 , the dynamic light receiving process range is 2-5 min, the effective crosslinking density range is 0.15mmol/cm 3 -0.45mmol/cm 3 , the screw rotating speed is 30-150 rpm, the crosslinking temperature is 190-210 ℃, and the extrusion temperature is 170-190 ℃; and carrying out dynamic hot drawing and heat treatment on the nascent fiber to obtain the high-performance intelligent composite fiber material.
  2. 2. The efficient, stable and continuous production method of the high-performance intelligent composite fiber material according to claim 1, wherein the light of the dynamic light receiving process is ultraviolet light with a central wavelength of 365 nm.
  3. 3. The efficient stable continuous production method of high-performance intelligent composite fiber material according to claim 1, wherein the temperature of the hot melting operation is 175-200 ℃.
  4. 4. The efficient stable continuous production method of high-performance intelligent composite fiber material according to claim 1, wherein the diameter deviation fluctuation of the high-performance intelligent composite fiber material is less than 5%.
  5. 5. The efficient stable continuous production method of the high-performance intelligent composite fiber material according to claim 1, wherein the preparation method of the solvent-free liquid crystal oligomer comprises the following steps: Stirring and mixing a liquid crystal monomer, a chain extender, a catalyst, a cross-linking agent, an initiator and a solvent to obtain liquid crystal precursor liquid; and standing the liquid crystal precursor liquid, and then performing preliminary drying to obtain the solvent-free liquid crystal oligomer.
  6. 6. The efficient stable continuous production method of high-performance intelligent composite fiber material according to claim 1, wherein the dynamic hot drawing temperature is 80-160 ℃ and the total drawing multiple is 3-10 times, and/or, The temperature of the heat treatment is 100-150 ℃ and the time is 1-10 min.
  7. 7. The efficient, stable and continuous production method of high-performance intelligent composite fiber material according to claim 1, further comprising the following steps after the step of dynamically hot drawing and heat treating the nascent fiber: and shaping and winding the high-performance intelligent composite fiber into a cylinder through a high-speed winding head, wherein the tension is constant during shaping and winding.
  8. 8. The method for efficient, stable and continuous production of high performance intelligent composite fiber material according to claim 1, wherein the cross-linking agent is a polyfunctional acrylate compound comprising at least one of trimethylolpropane tris (3-mercaptopropionate) (TMPMP), tris [ (3-mercaptopropionyloxy) -ethyl ] -isocyanurate (TEMIC), pentaerythritol tetraacrylate (PETA), trimethylolpropane triacrylate (TMPTA), dipentaerythritol penta/hexaacrylate (DPEPA), ethoxylated trimethylolpropane triacrylate and triallyl isocyanurate (TAIC), and/or, The chain extender comprises at least one of a difunctional thiol compound, a difunctional diacrylate compound and a difunctional diisocyanate compound, and/or, The initiator includes at least one of Benzoyl Peroxide (BPO), dicumyl peroxide (DCP), azobisisobutyronitrile (AIBN), azobisisoheptonitrile (ABVN), lauroyl Peroxide (LPO), potassium persulfate (KPS), ammonium Persulfate (APS), 2' -azobis (2-methylpropionamidine) dihydrochloride (V-50), di (2-ethylhexyl) peroxydicarbonate (EHP), tert-butylhydroperoxide (TBHP), 2-hydroxy-2-methyl-1-phenyl-1-propanone (1173), 1-hydroxycyclohexylphenyl ketone (184), 2-benzyl-2-dimethylamino-1- (4-morpholinophenyl) butanone (369), phenylbis (2, 4, 6-trimethylbenzoyl) phosphine oxide (819), 2-dimethoxy-2-phenylacetophenone (651), benzoin dimethyl ether (651), and 2,4, 6-trimethylbenzoyl-diphenylphosphine oxide (TPO).
  9. 9. The efficient, stable and continuous production method of high-performance intelligent composite fiber material according to claim 1, wherein the solvent-free liquid crystal oligomer further comprises a light energy conversion functional filler and/or, The liquid crystal monomer comprises at least one of a thermal response nematic liquid crystal monomer, a chiral doped liquid crystal monomer, a photo response liquid crystal monomer, an ionic liquid crystal monomer, a hydrogen group-containing liquid crystal monomer and a siloxane liquid crystal monomer, and/or, The thermoplastic polymer elastomer includes at least one of an ethylene-based block copolymer, a thermoplastic polyester elastomer, a thermoplastic polyurethane elastomer, and a dynamically vulcanized thermoplastic elastomer.
  10. 10. A high performance intelligent composite fiber material, characterized in that the high performance intelligent composite fiber material is obtained by adopting the high efficiency stable continuous production method of any one of claims 1-9.

Description

High-performance intelligent composite fiber material and efficient stable continuous production method thereof Technical Field The present disclosure relates to the technical field of high performance intelligent composite fiber materials, and in particular, to a high performance intelligent composite fiber material and a high efficiency stable continuous production method thereof. Background The intelligent composite fiber material has the characteristics of flexibility, braiding property and light weight of fibers, and can be directly integrated into scenes such as intelligent clothing, flexible electronic equipment, biomedical brackets, environment monitoring devices, self-adaptive systems, artificial muscles and the like, so that the integrated functions of sensing, responding and executing are realized. Liquid crystal elastomer fibers are common high-performance intelligent composite fiber materials. At present, common liquid crystal elastomer fiber preparation methods include wet spinning and solvent evaporation assisted template method. For example, in the wet spinning disclosed in CN120818911a, when the good solvent of the spinning solution is exchanged with the non-solvent of the coagulation bath during the wet spinning, the gradient of the cross change rate is easy to occur, which results in low orientation of the liquid crystal element, and the prepared liquid crystal elastomer fiber has low mechanical strength and poor uniformity, and cannot be suitable for applications of intelligent fabrics, wearable devices, flexible drivers, artificial muscles, soft robot actuators, medical rehabilitation apparatuses and interactive bionic materials. As another example, the solvent evaporation assisted template method disclosed in patent CN119613595B and patent CN121228384A, the multi-stage batch operation results in poor product uniformity among batches, and has the problems of low efficiency and more complex operation. In addition, the free orientation of the liquid crystal monomer can be limited due to the existence of the template, so that the multi-domain liquid crystal elastomer fiber formed after crosslinking has low orientation degree, and the problems of limited response sensitivity and deformation amount are solved, and the multi-domain liquid crystal elastomer fiber is difficult to adapt to the application of intelligent fabrics, wearable equipment, flexible drivers, artificial muscles, soft robot executors, medical rehabilitation instruments and interactive bionic materials. Disclosure of Invention The purpose of the present disclosure is to overcome the shortcomings in the prior art, and to provide a high-performance intelligent composite fiber material and a high-efficiency stable continuous production method thereof, which do not need template assistance, and which have the advantages of simple operation, high production efficiency, high uniformity of each batch of products of the produced high-performance intelligent composite fiber material, and high response and high elastic fatigue resistance, so as to better adapt to applications of intelligent fabrics, wearable devices, flexible drivers, artificial muscles, soft robotic actuators, medical rehabilitation apparatuses and interactive bionic materials. The aim of the disclosure is achieved by the following technical scheme: a high-performance intelligent composite fiber material high-efficiency stable continuous production method, Premixing a solvent-free liquid crystal oligomer and a thermoplastic polymer elastomer to obtain a solid premix material, wherein the solvent-free liquid crystal oligomer comprises a liquid crystal monomer, a chain extender, a catalyst, a cross-linking agent and an initiator; carrying out hot melting operation on the premixed material through an extruder, and then carrying out in-situ crosslinking, shearing, curing and extruding operation to form nascent fibers; Wherein the effective irradiation intensity range of the in-situ crosslinking, shearing, curing and extrusion operation is 80mW/cm 2-150mW/cm2, the dynamic light receiving process range is 2-5 min, the effective crosslinking density range is 0.15mmol/cm 3-0.45mmol/cm3, the screw rotating speed is 30-150 rpm, the crosslinking temperature is 190-210 ℃, and the extrusion temperature is 170-190 ℃; and carrying out dynamic hot drawing and heat treatment on the nascent fiber to obtain the high-performance intelligent composite fiber material. In one embodiment, the dynamic light receiving process light is ultraviolet light with a central wavelength of 365 nm. In one embodiment, the temperature of the hot melt operation is 175 ℃ to 200 ℃. In one embodiment, the high performance smart composite fiber material has a diameter variation fluctuation of less than 5%. In one embodiment, the method for preparing the solvent-free liquid crystal oligomer comprises the following steps: Stirring and mixing a liquid crystal monomer, a chain extender, a catalyst, a cross-linki