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Flexible composite phase change energy storage wire and preparation method thereof

A technology of composite phase-change and phase-change energy storage materials, applied in the field of flexible composite phase-change energy storage wires and their preparation, can solve the problems of low thermal response rate, low thermal conductivity, etc., and achieve low cost, strong shape diversity, Simple and easy preparation method

Pending Publication Date: 2020-01-14
GUIZHOU INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a flexible composite phase change energy storage line and its preparation method to solve the low thermal conductivity of the existing flexible packaging substrate polymer hollow fiber, and the prepared woven composite phase change material due to low Thermal response rate due to thermal conductivity remains low

Method used

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  • Flexible composite phase change energy storage wire and preparation method thereof
  • Flexible composite phase change energy storage wire and preparation method thereof
  • Flexible composite phase change energy storage wire and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0026] A method for preparing a flexible composite phase-change energy storage line, comprising the following steps:

[0027] 1) Dry polyvinylidene fluoride powder (Solvay 6020) and hydroxyl-functionalized multi-walled carbon nanotubes in a vacuum oven at 60° C. for 12 hours for later use. Stir 5wt% hydroxyl-functionalized multi-walled carbon nanotubes (2-8 μm in length), 5wt% styrene-maleic anhydride, 1wt% polyethylene glycol 2000 and 70wt% dimethylacetamide at 70°C 5h, and ultrasonication for 30min (frequency 200HZ) to graft multi-walled carbon nanotubes on styrene-maleic anhydride and evenly disperse them in the solvent.

[0028] 2) Invert the solution obtained in step 1) and 19wt% polyvinylidene fluoride together in the reactor, stir at 70°C for 24 hours at a stirring rate of 40r / min, and form a uniform and transparent homogeneous spinning solution after vacuum defoaming .

[0029] 3) Prepare thermally conductive porous polyvinylidene fluoride fibers by using non-solvent...

Embodiment 2

[0032] A method for preparing a flexible composite phase-change energy storage line, comprising the following steps:

[0033] 1) Dry polyvinylidene fluoride powder (Solvay 6020) and hydroxyl-functionalized multi-walled carbon nanotubes in a vacuum oven at 60° C. for 12 hours for later use. Stir 3 wt% hydroxyl-functionalized multi-walled carbon nanotubes (2-8 μm in length), 5 wt% styrene-maleic anhydride, 1 wt% polyethylene glycol 2000 and 72 wt% dimethylacetamide at 70°C 5h, and ultrasonication for 30min (frequency 200HZ) to graft multi-walled carbon nanotubes on styrene-maleic anhydride and evenly disperse them in the solvent.

[0034]2) Invert the solution obtained in step 1) and 19wt% polyvinylidene fluoride together in the reactor, stir at 70°C for 24 hours at a stirring rate of 40r / min, and form a uniform and transparent homogeneous spinning solution after vacuum defoaming .

[0035] 3) Prepare thermally conductive porous polyvinylidene fluoride fibers by using non-solv...

Embodiment 3

[0038] A method for preparing a flexible composite phase-change energy storage line, comprising the following steps:

[0039] 1) Dry polyvinylidene fluoride powder (Solvay 6020) and hydroxyl-functionalized multi-walled carbon nanotubes in a vacuum oven at 60° C. for 12 hours for later use. Stir 1wt% hydroxyl-functionalized multi-walled carbon nanotubes (2-8 μm in length), 5wt% styrene-maleic anhydride, 1wt% polyethylene glycol 2000 and 74wt% dimethylacetamide at 70°C 5h, and ultrasonication for 30min (frequency 200HZ) to graft multi-walled carbon nanotubes on styrene-maleic anhydride and evenly disperse them in the solvent.

[0040] 2) Invert the solution obtained in step 1) and 19wt% polyvinylidene fluoride together in the reactor, stir at 70°C for 24 hours at a stirring rate of 40r / min, and form a uniform and transparent homogeneous spinning solution after vacuum defoaming .

[0041] 3) Prepare thermally conductive porous polyvinylidene fluoride fibers by using non-solvent...

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Abstract

The invention provides a flexible composite phase-change energy storage wire and a preparation method thereof; the flexible composite phase-change energy storage wire is made with prepared heat-conducting porous polyvinylidene fluoride fibers packaged with a phase-change energy storage material, and the heat-conducting porous polyvinylidene fluoride fibers are polyvinylidene fluoride fibers whichhave a compact skin structure and a porous inner supporting structure and are modified by a heat-conducting filler. The problems that the existing flexible packaging substrate polymer hollow fibers have low heat conductivity and the prepared weavable composite phase-change material has very low heat response rate due to low thermal conductivity are solved. The invention belongs to the technical field of energy storage materials.

Description

technical field [0001] The invention belongs to the technical field of energy storage materials, and in particular relates to a flexible composite phase change energy storage line and a preparation method thereof. Background technique [0002] Energy is an integral part of our lives. Without energy, it will be difficult for the economy to develop forward, and it will be difficult for society to progress. The earliest research on energy storage was in the 1860s. At that time, it was mainly to save energy and recover waste heat from solar energy and wind energy. After continuous development, energy storage materials have been widely used in electronic computers, construction, textiles, industry, and aviation. and other different fields. Among them, the main way of thermal energy storage is latent heat storage (phase change energy storage) technology, which utilizes a large amount of latent heat absorbed or released when the phase change energy storage material itself changes ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/48D01F1/10D01F11/06
CPCD01F1/10D01F6/48D01F11/06
Inventor 罗大军秦舒浩伍玉娇周登凤李杨
Owner GUIZHOU INST OF TECH
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