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Preparation method of organic phase change composite material and prepared phase change composite material

A composite material and organic phase technology, applied in the direction of heat exchange materials, chemical instruments and methods, etc., can solve the problems of overheating heat storage performance, system overcooling, low thermal conductivity, etc., to increase thermal conductivity and phase change latent heat High, high thermal conductivity effect

Active Publication Date: 2022-03-22
北京市科学技术研究院分析测试研究所(北京市理化分析测试中心)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a method for preparing an organic phase change composite material to alleviate the problem that the low thermal conductivity of the organic phase change material prepared by the existing method leads to local overcooling or overheating of the system and the reduction of heat storage performance

Method used

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  • Preparation method of organic phase change composite material and prepared phase change composite material
  • Preparation method of organic phase change composite material and prepared phase change composite material
  • Preparation method of organic phase change composite material and prepared phase change composite material

Examples

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Effect test

Embodiment 1

[0035] Immerse poly-p-phenylene terephthalamide airgel (porosity 94.7%) in sucrose solution (sucrose 15g, water 85g), vacuumize and place the system in an ultrasonic cleaner (200W) for 1.5 hours , take it out and freeze-dry it; then put the poly-p-phenylene terephthalamide airgel impregnated with sucrose into the quartz tube of the tube furnace, fill the system with argon gas, and the flow rate of argon gas is 10-20mL / min, so that there is no active gas such as oxygen in the quartz tube, the temperature of carbonization is 350 ° C, and the time is 3 hours to form a carbon-coated airgel material.

[0036] Using the method of vacuum impregnation, vacuum impregnate the above-mentioned carbon-coated airgel material in polyethylene glycol (average molecular weight 4000) melt (80 ° C), and take out the airgel impregnated with polyethylene glycol after 24 hours The material was placed in an oven at 100°C and heated to a constant weight to obtain a polymer airgel organic phase change...

Embodiment 2

[0044] This example is similar to Example 1, except that the concentration of the sucrose solution is changed to 10 g of sucrose and 90 g of water, the other conditions are the same, and a polymer airgel organic phase change composite material is obtained, which is marked as C2.

Embodiment 3

[0046] The poly-p-phenylene terephthalamide airgel (porosity 94.7%) was immersed in glucose solution (glucose 25g, water 75g), vacuumized and the system was placed in an ultrasonic cleaner (300W) for 1.5 hours , take it out and freeze-dry it; then put the poly-p-phenylene terephthalamide aerogel impregnated with glucose into the quartz tube of the tube furnace, fill the system with argon gas, and the flow rate of argon gas is 10-20mL / min, so that there is no active gas such as oxygen in the quartz tube, the temperature of carbonization is 350 °C, and the time is 4 hours to form a carbon-coated airgel material.

[0047] Using the method of vacuum impregnation, the above-mentioned carbon-coated airgel material is vacuum-impregnated in polyethylene glycol (average molecular weight 4000) melt (80 ° C), and the airgel impregnated with polyethylene glycol is taken out after 18 hours The material was placed in an oven at 100°C and heated to a constant weight to obtain a polymer airg...

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Abstract

The invention belongs to the technical field of preparation of phase-change materials, particularly relates to a preparation method of an organic phase-change composite material and the prepared phase-change composite material, and aims to solve the problems that a system is locally overcooled or overheated and the heat storage performance is reduced due to the fact that an existing organic phase-change material is low in heat conductivity. A preparation method of an organic phase change composite material comprises the following steps: step 1, impregnating polymer aerogel in a carbohydrate aqueous solution, performing freeze drying, and performing low-temperature carbonization treatment to form a carbon-coated aerogel material; and 2, carrying out vacuum impregnation on the aerogel material in an organic phase-change material melt by adopting a vacuum impregnation method, and then heating to remove the unadsorbed organic phase-change material to obtain the polymer aerogel organic phase-change composite material. According to the aerogel organic phase change composite material prepared by the method, the wettability of the aerogel carrier and the organic phase change material is improved, and meanwhile, the heat conductivity coefficient of the material is increased.

Description

technical field [0001] The invention belongs to the technical field of phase-change material preparation, and in particular relates to a preparation method of an organic phase-change composite material and the prepared phase-change composite material. Background technique [0002] Due to the shortage of fossil energy and energy shortage, the energy crisis has attracted more and more attention worldwide. Heat storage is becoming one of the most effective ways to use existing energy reasonably and efficiently. Among all heat storage methods, latent heat storage has been widely studied and applied in many fields due to its excellent phase transition characteristics and high heat storage capacity. Phase change material is a kind of heat storage material, which can store and release latent heat by adjusting its own phase change with the change of ambient temperature. In recent years, phase change materials have been widely used in battery thermal management, building energy sav...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06
CPCC09K5/063Y02E60/14
Inventor 刘卫卫李亚莉邹涛黎爽王小飞邓平晔
Owner 北京市科学技术研究院分析测试研究所(北京市理化分析测试中心)
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