Thermal conductivity enhanced organic composite shaped phase change material and preparation method thereof

一种定形相变材料、导热增强的技术，应用在热交换的材料、化学仪器和方法等方向，能够解决蓄热量利用率低、小导热系数、传热性能差等问题，达到优异定形效果、大相变焓值、导热性能提高的效果

Active Publication Date: 2018-05-18
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Organic solid-liquid phase change materials are favored by researchers due to their advantages such as not being prone to supercooling and phase separation, less corrosive materials, relatively stable performance, and less toxicity. In addition to the serious leakage problem, the small thermal conductivity leads to poor heat transfer performance and low utilization rate of heat storage in practical applications, thus limiting its application

Method used

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  • Thermal conductivity enhanced organic composite shaped phase change material and preparation method thereof
  • Thermal conductivity enhanced organic composite shaped phase change material and preparation method thereof
  • Thermal conductivity enhanced organic composite shaped phase change material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0033] (1) Take 0.3158g of sodium alginate in a three-necked flask, add 20mL of water, and stir at 70°C for 20min to obtain a sodium alginate solution;

[0034] (2) Add 6g of PEG-6000 (sodium alginate and polyethylene glycol mass ratio is 5:95) and graphene aqueous dispersion (containing graphene 0.0064g, the mass fraction of thermal conductivity enhancer graphene in the material is 1%), continue to stir for 60min, drop calcium chloride solution (0.05mol / L) to form a gel, and obtain a composite calcium alginate gel;

[0035] (3) Vacuum drying at 40° C. for 24 hours to obtain an organic composite shape-fixed phase change material.

[0036] figure 1 It is the infrared spectrogram of the thermal conductivity-enhanced organic composite shape-setting phase change material in Example 1, wherein: a, pure polyethylene glycol, b, thermal conductivity-enhanced organic composite shape-setting phase change material. It can be seen from the figure that the infrared peak of the composite ...

Embodiment 2-4

[0038] The mass ratios of sodium alginate and polyethylene glycol (Mn=6000) were changed to 50:50, 25:75, and 10:90 respectively to obtain the corresponding organic composite shape-setting phase change material, and other conditions were consistent with those in Example 1. The measurement results show that the prepared thermal conductivity-enhanced organic composite shape-setting phase change material has a good shape-setting effect.

Embodiment 5-9

[0040] Sodium polyacrylate, potassium polymaleate, polyvinylpyridine, carboxymethyl cellulose, and polyvinyl alcohol are used as polymer materials that need to be coordinated to obtain corresponding heat conduction-enhanced organic composite shape-setting phase change materials. Other conditions and examples 1 consistent. The measurement results show that the prepared thermal conductivity-enhanced organic composite shape-setting phase change material has a good shape-setting effect.

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Abstract

The invention relates to a thermal conductivity enhanced organic composite shaped phase change material and a preparation method thereof, and belongs to the technical field of new materials. The thermal conductivity enhanced organic composite shaped phase change material is characterized in that the composite shaped phase change material is prepared from, by mass, 1-50% of coordination cross-linking network polymer, 40-98.9% of organic solid liquid phase change material and 0.1-10% of thermal conductivity enhancer, wherein the coordination cross-linking network polymer is prepared by coordination complexation of a polymer compound with metal ions. The material has a simple synthesis process, convenient application, a large phase change enthalpy value and an excellent shaping effect, and liquid leakage does not occur during operation. The material has a simple synthesis process, convenient application and broad application prospects in the field of thermal energy storage and management.

Description

technical field [0001] The invention relates to a heat conduction enhanced organic composite shape-setting phase change material and a preparation method thereof, belonging to the technical field of new materials. Background technique [0002] Phase change material (PCM) uses the property of absorbing or releasing a large amount of heat when a substance undergoes a phase change to store and release energy. It has the advantages of high heat storage density, small equipment volume, high thermal efficiency, and constant temperature process of heat absorption and release. . It has good application prospects in solar energy utilization, industrial waste heat recovery, and power load regulation. Organic solid-liquid phase change materials are favored by researchers due to their advantages such as not being prone to supercooling and phase separation, less corrosive materials, relatively stable performance, and less toxicity. In addition to the serious leakage problem, the small ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06
CPCC09K5/063C09K5/14
Inventor 唐炳涛樊晓乔张宇昂吕荣文张淑芬
Owner DALIAN UNIV OF TECH
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