Method for preparing shape-stabilized phase change material by using acrylic fiber waste silks

A technology for shaping phase change material and acrylic fiber waste silk, which is applied in the field of phase change energy storage materials, can solve problems such as phase change material leakage, achieve low production cost, good morphological stability and thermal stability, and simple preparation process. Effect

Inactive Publication Date: 2010-10-06
DALIAN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The PEG-based solid-liquid phase change materials reported in the literature, such as blending PEG with inorganic particles, polypropylene (PP) and other substances, can obtain phase change materials, but there are problems such as leakage of phase change materials

Method used

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  • Method for preparing shape-stabilized phase change material by using acrylic fiber waste silks
  • Method for preparing shape-stabilized phase change material by using acrylic fiber waste silks
  • Method for preparing shape-stabilized phase change material by using acrylic fiber waste silks

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The first step, preparation of acrylic waste silk hydrolyzate: add 5g of PAN waste silk, 5g of sodium hydroxide, and 95ml of deionized water into a 250ml three-neck flask, stir and reflux at 130°C, wait until the waste silk is completely dissolved, and cool to room temperature , add 20ml of 95% ethanol for precipitation, and use 0.1mol / L hydrochloric acid to adjust the pH value of the precipitate to be slightly less than 7, stir for 30min, then wash with ethanol until neutral, and vacuum dry at 95°C for later use.

[0027] The second step, preparation of phase change material: Weigh 2g of acrylic fiber waste hydrolyzate in 150mL conical flask A, add solvent N, N-dimethylformamide (DMF) 20ml to dissolve and swell for 2h; weigh polyethylene Diol (6000) 5g, chain extender tetrabutyl phthalate (TBT) 0.8g, catalyst dibutyltin dilaurate 0.015g In another 150mL Erlenmeyer flask B, add DMF 20ml, and stir magnetically at 90°C for 60 Minutes, then pour the solution of acrylic fib...

Embodiment 2

[0032] The first step, preparation of acrylic waste silk hydrolyzate: add PAN waste silk 5g, sodium hydroxide 10g, and deionized water 90ml into a 250ml three-neck flask, stir and reflux at 150°C, wait until the waste silk is completely dissolved, and cool to room temperature , add 20ml of 95% ethanol for precipitation, and use 0.1mol / L hydrochloric acid to adjust the pH value of the precipitate to be slightly less than 7, stir for 30min, then wash with ethanol until neutral, and vacuum dry at 95°C for later use.

[0033] The second step, preparation of phase change material: Weigh 2g of acrylic fiber waste hydrolyzate in 150mL Erlenmeyer flask A, add 20ml of N,N-dimethylformamide (DMF) to dissolve and swell for 2h; weigh polyethylene glycol Alcohol (2000) 5g, chain extender tetrabutyl phthalate (TBT) 0.4g, catalyst dibutyltin dilaurate 0.007g in another 150mL Erlenmeyer flask B, add DMF 20ml, magnetically stir at 80°C for 1h, Then pour the solution of the hydrolyzate of acryl...

Embodiment 3

[0035] The first step, the preparation of acrylic waste silk hydrolyzate: add PAN waste silk 5g, sodium hydroxide 10g, and deionized water 90ml into a 250ml three-neck flask, stir and reflux at 140°C, wait until the waste silk is completely dissolved, and cool to room temperature , add 20ml of 95% ethanol for precipitation, and use 0.1mol / L hydrochloric acid to adjust the pH value of the precipitate to be slightly less than 7, stir for 30min, then wash with ethanol until neutral, and vacuum dry at 95°C for later use.

[0036]Preparation of phase change material: Weigh 4g of acrylic fiber waste hydrolyzate in 150mL Erlenmeyer flask A, add 20ml of N,N-dimethylformamide (DMF) to dissolve and swell for 2h; weigh polyethylene glycol (4000) 5g, chain extender tetrabutyl phthalate (TBT) 0.8g, catalyst dibutyltin dilaurate 0.015g in another 150mL Erlenmeyer flask B, add DMF20ml, magnetically stir at 80°C for 1h, then acrylic fiber waste The solution of the silk hydrolyzate was poured ...

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Abstract

The invention relates to a method for preparing a shape-stabilized phase change material by using acrylic fiber waste silks. The method comprises the following steps of: hydrolyzing the acrylic fiber waste silks into alkali liquid, obtaining an acrylic fiber hydrolysis product through ethanol precipitation, and then swelling and dissolving the acrylic fiber hydrolysis product; and mixing and reacting the acrylic fiber hydrolysis product and a mixture of polyethylene glycol, chain extender, catalyst and solvent to obtain a graft copolymer of the acrylic fiber hydrolysis product and the polyethylene glycol, wherein the graft copolymer has the solid-solid phase change characteristic. The shape-stabilized phase change material prepared by the method has the advantages of high heat enthalpy value, excellent thermal stability, simple preparation method, low cost, reclamation and recycle of the solvent and the like; and the method is a technique capable of realizing resource reutilization, energy conservation and environmental protection, and has broad market application space.

Description

technical field [0001] The invention relates to the technical field of phase-change energy storage materials, in particular to a method for preparing shape-fixed phase-change materials by using waste acrylic fibers. Background technique [0002] At present, the economic development of all countries in the world is facing two major problems, one is the energy crisis, and the other is environmental pollution. my country is a big country in the production and consumption of acrylic fiber (scientific name polyacrylonitrile fiber). At present, the total consumption of acrylic fiber in the domestic market is about 1.3 million tons, and the total amount of waste acrylic fiber produced every year is about 100,000 tons. If it is not recycled, on the one hand It will cause environmental pollution, and on the other hand, it will cause waste of resources. Therefore, strengthening the recycling of waste acrylic fiber and turning waste into treasure can not only realize the regeneration of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G81/02C08G65/48C08F20/44C08F8/12
Inventor 郭静相恒学
Owner DALIAN POLYTECHNIC UNIVERSITY
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