CN-122013505-A - Phase-change fiber integrating photo-thermal function and electric heating function and continuous preparation method thereof

Abstract

The invention relates to a phase change fiber integrating light, heat and electricity and a continuous preparation method thereof, belonging to the technical field of functional fibers. The continuous preparation method comprises the following steps of S1, wrapping a first carbon nano tube cylinder on the surface of a high polymer yarn in a ring twisting mode, obtaining composite fibers after being impregnated by a first shrinking agent, S2, immersing the composite fibers in a phase change material or dispersion liquid thereof, wrapping a second carbon nano tube cylinder on the surface of the composite fibers in a ring twisting mode, repeating for a plurality of times, and drying to obtain the phase change fibers integrating light and heat. The phase change fiber has the advantages of high latent heat, excellent leakage resistance, high-efficiency heat and electricity conducting capability and excellent mechanical property, can realize continuous preparation, and has wide prospects of large-scale production and practical application.

Inventors

• LUO XIAOGANG
• ZHAO SHUHAN
• LIANG YUNXIA
• LIU QIWEN
• ZHANG KEQIN
• Lao Haiqing

Assignees

• 苏州大学

Dates

Publication Date

20260512

Application Date

20260413

Claims (10)

1. 1. A continuous preparation method of phase-change fibers integrating photo-thermal and electric heating is characterized by comprising the following steps: s1, wrapping a first carbon nano tube cylinder on the surface of a high polymer yarn in a ring twisting mode, and impregnating the high polymer yarn with a first shrinking agent to obtain a composite fiber; S2, soaking the composite fiber in the phase change material or dispersion liquid thereof, wrapping a second carbon nano tube cylinder on the surface of the composite fiber in a ring twisting mode, and soaking the composite fiber by a second shrinking agent to obtain the phase change fiber; s3, repeating the step S2 for a plurality of times, and drying to obtain the phase change fiber integrating light, heat and electricity.
2. 2. The continuous preparation method of the phase-change fiber integrating light and heat as claimed in claim 1, wherein in the step S1, the polymer yarn is one or more selected from vinylon, terylene, chinlon, polypropylene, cotton and wool.
3. 3. The continuous preparation method of the phase-change fiber integrating light, heat and electricity as claimed in claim 1, wherein in the step S2, the concentration of the phase-change material dispersion liquid is 30-75wt%; and/or the phase change material is selected from one or more of polyethylene glycol, n-eicosane, n-octadecane, n-decanoic acid, lauric acid, stearic acid and paraffin.
4. 4. The continuous preparation method of the phase-change fiber integrating light, heat and electricity according to claim 1, wherein in the step S3, the number of repetitions is 3-5.
5. 5. The continuous preparation method of the phase-change fiber integrating light, heat and electric heat according to claim 1, wherein in the step S3, the drying temperature is 65-75 ℃ and the drying time is 55-65 min.
6. 6. The continuous preparation method of the phase change fiber integrating light and heat as claimed in claim 1, wherein the preparation of the first carbon nanotube tube and the second carbon nanotube tube independently comprises the steps of placing a metal precursor, a growth promoter and a carbon source in a reactor for reaction under a protective atmosphere to obtain the carbon nanotube tube.
7. 7. The continuous preparation method of the phase-change fiber integrating light, heat and electric heat as claimed in claim 6, wherein the metal precursor is ferrocene; And/or, the growth promoter is thiophene; And/or, the carbon source is ethanol; And/or the mass ratio of the metal precursor, the growth promoter and the carbon source is (98-99): 0.4-0.8.
8. 8. The continuous preparation method of the phase-change fiber integrating light, heat and electricity according to claim 6, wherein the reaction temperature is 1250-1350 ℃.
9. 9. The method for continuously preparing a photo-thermal and electro-thermal integrated phase change fiber according to claim 1, wherein the first shrinkage agent and the second shrinkage agent are independently selected from water or ethanol.
10. 10. The photo-thermal and electro-thermal integrated phase change fiber prepared by the continuous preparation method as claimed in any one of claims 1-9.

Description

Phase-change fiber integrating photo-thermal function and electric heating function and continuous preparation method thereof Technical Field The invention belongs to the technical field of functional fibers, and particularly relates to a phase-change fiber integrating light, heat and electricity and a continuous preparation method thereof. Background The phase change fiber is a functional fiber which can realize the absorption, storage and release of a large amount of latent heat through the transformation of the self physical state of the phase change material loaded in the phase change fiber in a specific temperature interval, has the outstanding advantages of high energy storage density, approximately constant temperature in the phase change process, excellent chemical stability and the like, has wide application prospect in the field of personal thermal management, can effectively maintain the stability of microclimate around a human body, resists uncomfortable feeling caused by environmental temperature fluctuation, can provide a bidirectional thermal regulation function for the human body without consuming a large amount of energy, and meets the development requirements of intelligent wearing and energy-saving thermal management. Currently, the mainstream preparation methods of phase-change fibers include a melt spinning method, an electrostatic spinning method, a wet spinning method, a vacuum impregnation method and the like. However, the phase-change fibers obtained by the method have the defects that the addition amount of the phase-change material is limited, and the phase-change material is easy to leak in the solid-liquid phase transformation process, so that the actual application effect and the service life of the phase-change fibers are seriously affected. In order to solve the key problem of leakage of the phase change material, the solid-liquid phase change material is often modified in the prior art to convert the solid-liquid phase change property into the solid-solid phase change property, for example, researchers such as Liu and the like prepare the solid-solid phase change fiber with good leakage prevention performance and circulation stability through a polycondensation reaction and a wet spinning process, but although the solid-solid phase change modification strategy can effectively inhibit the leakage problem, the latent heat performance of the phase change fiber is usually obviously reduced, the temperature regulation capability of the phase change fiber is further limited, and the actual requirements of the personal heat management field are difficult to meet. In addition, the heat energy storage of the traditional phase-change fiber depends on that the ambient temperature is higher than the phase-change temperature, the capacity of actively absorbing heat energy is lacking, meanwhile, the defect of poor electric conductivity and thermal conductivity is commonly existed, and the function expansion and the application scene extension of the traditional phase-change fiber are further restricted. For the performance shortboards described above, the prior art attempts to introduce functional materials into phase change fiber systems to achieve performance optimization. As disclosed in patent CN 117187979A, a preparation method of a continuous polyurethane phase-change fiber with optical/electrical-thermal conversion is disclosed, carbon nano materials with strong light absorption, high heat conduction and high electrical conductivity are introduced into a synthesized polyurethane phase-change material, and then the phase-change fiber is prepared by a melt spinning process, although the heat conduction performance of the polyurethane phase-change fiber is improved to a certain extent, the preparation process is complex, the reaction time is long, large-scale efficient production is not facilitated, the mechanical performance of the phase-change fiber is easily degraded due to the addition of powdery carbon materials, and the synergistic balance of high latent heat performance and strong mechanical performance is difficult to realize. Patent CN 120138888A discloses a preparation method of a flexible core-shell structure composite phase-change temperature-regulating organic fiber membrane material, which simplifies the preparation flow and reduces the production cost by a melt spinning technology, optimizes the coaxial electrostatic spinning technological parameters, and finally prepares the composite phase-change fiber membrane with high melting enthalpy value, excellent thermal stability and excellent mechanical property, but the preparation method cannot realize continuous preparation of the phase-change fiber, and is difficult to meet the requirement of industrial mass production. Patent CN 113403834A discloses a high-strength high-toughness carbon nanotube composite phase-change fiber, a preparation method and application thereof, the carbon nanotube fiber is expanded by utilizing