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Middle-temperature composite shape-stabilized phase-change heat storage material and preparation method thereof

A technology of heat storage material and shape-fixed phase change, applied in the direction of heat exchange materials, chemical instruments and methods, sustainable manufacturing/processing, etc., can solve problems such as practical application inconvenience, achieve low cost, expand application range, and prepare methods simple effect

Inactive Publication Date: 2015-08-12
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as a solid-liquid phase change material, there is liquid in the process of use, so the packaging problem of the material must be solved, which makes its practical application extremely inconvenient

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] 1) Preparation of suspension: Take 2.0 g of erythritol, mix 0.7 g of polyethylene glycol 10000 with 100 mL of absolute ethanol, put it in a water bath at 75 °C, stir and reflux to completely dissolve erythritol and polyethylene glycol 10000 Finally, the heating was stopped, the solution was stirred vigorously and the temperature was cooled to room temperature, and erythritol was precipitated during the cooling process to obtain a stable suspension.

[0018] 2) Cooling of the suspension: With continuous stirring, add 0.51 g of aniline and 2 mL of concentrated hydrochloric acid to the above stable suspension, then transfer the mixture into an ice-water bath, stir vigorously, and let the temperature of the mixture drop to 0-5 °C.

[0019] 3) Initiate polymerization reaction: keep the stirring speed of the mixture constant, add 2.658 g of benzoyl peroxide to initiate the polymerization reaction of aniline, and allow the mixture to heat up naturally for 24 hours.

[0020] 4)...

Embodiment 2

[0024] 1) Preparation of suspension: Take 2.0 g of erythritol, mix 1.0 g of polyethylene glycol 10000 with 80 mL of absolute ethanol, put them in a water bath at 70 ° C, stir and reflux to make erythritol and polyethylene glycol 10000 After complete dissolution, stop heating, vigorously stir and cool the solution to room temperature, during the cooling process, erythritol precipitates out to obtain a stable suspension.

[0025] 2) Cooling of the suspension: With continuous stirring, add 0.51 g of aniline and 8 mL of concentrated hydrochloric acid to the above stable suspension, then transfer the mixture into a cold water bath, stir vigorously, and let the temperature of the mixture drop to 5-15 °C.

[0026] 3) Initiate polymerization reaction: keep the stirring speed of the mixture constant, add 2.658 g of benzoyl peroxide to initiate the polymerization reaction of aniline, and allow the mixture to heat up naturally for 24 hours.

[0027] 4) Separation and purification of prod...

Embodiment 3

[0031] 1) Preparation of suspension: Take 2.0 g of erythritol, 1.2 g of polyethylene glycol 10000 and 120 mL of absolute ethanol, mix them in a water bath at 50 ° C, stir and reflux to make erythritol and polyethylene glycol 10000 After complete dissolution, stop heating, vigorously stir and cool the solution to room temperature, during the cooling process, erythritol precipitates out to obtain a stable suspension.

[0032] 2) Cooling of the suspension: With continuous stirring, add 2.0 g of aniline and 4 mL of concentrated hydrochloric acid to the above stable suspension, then transfer the mixture into a cold water bath, stir vigorously, and let the temperature of the mixture drop to 5-15 °C.

[0033] 3) Initiate polymerization reaction: keep the stirring speed of the mixture constant, add 7.8 g of benzoyl peroxide to initiate the polymerization reaction of aniline, and allow the mixture to heat up naturally for 16 hours.

[0034] 4) Separation and purification of products: f...

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Abstract

The invention relates to a shape-stabilized phase-change material taking sugar alcohol materials as the phase-change heat storage material and a preparation method thereof. The supporting material of the shape-stabilized phase-change material is polyaniline. The preparation method comprises the following steps: dispersing sugar alcohol into waterless ethanol in the presence of a surfactant to form a stable suspension liquid, then adding aniline and hydrochloric acid, evenly mixing, adding an oxidant to trigger polymerization, wherein the polyaniline will settle on the surface of sugar alcohol particles, and finally separating and purifying the particles to obtain the shape-stabilized phase-change material. The prepared shape-stabilized phase-change material has the advantages of simple technology, low cost, high phase-change potential heat, and no need for encapsulation. The performance of sugar alcohol phase-change material is effectively improved, thus the application range of the sugar alcohol phase-change material is enlarged, and the provided material can be used in many occasions such as solar energy absorption refrigeration, industrial waste heat recovery, solar cooking utensils, and the like.

Description

technical field [0001] The invention relates to the preparation of a medium-temperature shape-setting phase-change heat storage material, specifically a medium-temperature composite shape-setting phase that has a high latent heat of phase change and is solid and stable in shape when the temperature is lower than or higher than its phase change temperature Variable heat storage material and preparation method thereof. Background technique [0002] Energy is the foundation of human survival and social development. With the depletion of fossil energy and the increasingly serious environmental problems caused by the use of fossil energy, people are paying more and more attention to the development and utilization of renewable clean energy. Solar energy is the best renewable and clean energy that we can obtain. It is inexhaustible and has no pollution. Therefore, it has become an important object of new energy development. Solar energy development can be divided into three utili...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06C08G73/02
CPCY02P20/10
Inventor 曾巨澜孙赛玲郑双好刘振强童海霞张雄飞肖忠良曹忠
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY