Elastic phase change energy storage polyurethane fiber and preparation method thereof

A polyurethane fiber and elastic polyurethane technology, applied in the field of elastic phase change energy storage polyurethane fiber and its preparation, can solve the problems of phase change material leakage, high load rate, etc., and achieve high phase change enthalpy, good flexibility, and good application prospects Effect

Active Publication Date: 2021-08-10
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The elastic phase change energy storage polyurethane fiber of the present invention not only has a high load rate for the phase change material, but also has good flexibility and mechanical properties of the fiber, and at the same time solves the problem of leakage of the phase change material

Method used

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  • Elastic phase change energy storage polyurethane fiber and preparation method thereof
  • Elastic phase change energy storage polyurethane fiber and preparation method thereof
  • Elastic phase change energy storage polyurethane fiber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Embodiment 1 (do not add ionic liquid)

[0054] (1) Take 5g of BASF's model 1185A thermoplastic polyurethane and add it to 25ml of N,N-dimethylformamide, stir to obtain a spinning solution, and naturally spin it into the coagulation bath deionized water at room temperature by wet spinning , solidified for 2 minutes to obtain polyurethane fibers; soak the polyurethane fibers in deionized water for 8 hours; freeze the fibers at -100°C for 5 hours, and then place the fibers on the board in the freeze dryer at an absolute pressure of 5Pa, freeze-drying for 12 hours at a temperature of 30° C. to obtain porous polyurethane fibers;

[0055] (2) Soak the porous polyurethane fiber completely in molten octadecane (heat and melt the octadecane), place it in a vacuum environment at 50°C for 10h, and hang the porous polyurethane fiber loaded with octadecane in the air at 50°C Stand still in the environment for 5 hours to remove excess octadecane on the surface to obtain octadecane / ...

Embodiment 2

[0059] (1) Take 3g of 1-decyl-3-methylimidazolium bromide and add it to 25ml of N,N-dimethylformamide, stir to obtain a mixed solution; then take 7g of BASF model 685A thermoplastic polyurethane and add it to the mixed solution In the process, the spinning solution was prepared; the aqueous solution of 30wt% N,N-dimethylformamide was used as a coagulation bath to carry out wet spinning at room temperature, and solidified for 4min to obtain polyurethane fibers; the polyurethane fibers were soaked in deionized water for 8h , the fibers were frozen at -120°C for 8 hours, and then the fibers were placed on the inner plate of the freeze dryer, and then freeze-dried for 18 hours under the conditions of an absolute pressure of 10Pa and a plate temperature of 35°C to obtain porous polyurethane fibers;

[0060] (2) Soak the porous polyurethane fiber in molten cetyl alcohol, place it in a vacuum environment of 70°C for 10h, hang the porous polyurethane fiber loaded with cetyl alcohol in ...

Embodiment 3

[0064] (1) Add 5g of 1-butyl-3-methylimidazolium hexafluorophosphate to 25ml of acetone and stir to obtain a mixed solution; then take 10g of BASF’s model b95a thermoplastic polyurethane and add it to the mixed solution to obtain a spinning solution ; Use 10% N,N-dimethylformamide aqueous solution as a coagulation bath to carry out wet spinning at 40 ° C, solidify for 3 minutes, and obtain polyurethane fibers; polyurethane fibers are soaked in deionized water for 6 hours, and then the fibers are placed in Freeze at -150°C for 3 hours, then place the fibers on the inner plate of the freeze dryer, freeze-dry for 15 hours at an absolute pressure of 15Pa, and a plate temperature of 45°C to obtain porous polyurethane fibers;

[0065] (2) Soak the porous polyurethane fiber in molten stearic acid, place it in a vacuum environment of 100°C for 12h, hang the porous polyurethane fiber loaded with stearic acid in an environment of 100°C and let it stand for 8h, remove excess surface Stea...

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Abstract

The invention belongs to the technical field of phase change fibers, and discloses elastic phase change energy storage polyurethane fiber and a preparation method thereof. The elastic phase change energy storage polyurethane fiber comprises elastic polyurethane fiber, a phase change material and a film layer; the elastic polyurethane fiber has a three-dimensional porous network structure; the phase change material fills the three-dimensional porous network structure; the film layer coats the surface of the elastic polyurethane fiber; and the film layer is a polyurethane film layer. The method comprises the following steps of dissolving polyurethane in an organic solvent or the organic solvent and ionic liquid to obtain a spinning solution; carrying out wet spinning on the spinning solution, performing soaking in water, and performing freeze-drying to obtain the porous polyurethane fiber; filling the porous structure with the liquid phase change material by adopting a vacuum impregnation method to obtain composite polyurethane fiber; and coating the surface of the composite polyurethane fiber with waterborne polyurethane, and performing film forming to obtain the elastic phase change energy storage polyurethane fiber. The fiber disclosed by the invention can be used for highly loading the phase change material, and has excellent flexibility and heat storage and thermal insulation properties.

Description

technical field [0001] The invention belongs to the technical field of phase change fibers, and in particular relates to an elastic phase change energy storage polyurethane fiber and a preparation method thereof. Background technique [0002] Phase change fibers refer to fibers containing phase change materials. Phase change materials can absorb and release energy by using the latent heat in the process of changing the state of matter. When the external temperature changes suddenly, it can buffer the impact of temperature changes on human physiological activities. Provide a comfortable wearing experience for the human body. [0003] Phase change energy storage materials can be classified into solid-liquid phase change, solid-gas phase change and gas-liquid phase change according to different phase transition modes. However, due to the volume expansion of solid-gas phase change and gas-liquid phase change materials during use Large and gaseous materials are easy to leak, so ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M13/02D06M13/188D06M13/144D06M15/53D06M15/568D06M15/572C09K5/06D06M101/38
CPCD06M13/02D06M13/188D06M13/144D06M15/53D06M15/568D06M15/572C09K5/063D06M2101/38
Inventor 严玉蓉李伟培吴松平邱志明何世杰
Owner SOUTH CHINA UNIV OF TECH
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