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Organic composite phase change energy storage material and preparation method and application thereof

A technology of composite phase change and energy storage materials, applied in the field of organic composite phase change energy storage materials and their preparation, can solve the problems of high requirements for thermal insulation measures, difficult long-term storage of heat, etc. Simple, long recovery half-life effect

Inactive Publication Date: 2020-01-10
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, traditional organic phase change materials suffer from severe heat loss during heat storage, and require high insulation measures. It is difficult to achieve long-term storage of heat by conventional insulation technology.

Method used

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  • Organic composite phase change energy storage material and preparation method and application thereof
  • Organic composite phase change energy storage material and preparation method and application thereof
  • Organic composite phase change energy storage material and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0039] Preparation of azobenzene compound: myristate chloride is reacted to generate tetradecanoic acid chloride, tetradecanoic acid chloride is esterified with 4-(phenylazo)phenol, suction filtered and washed to obtain myristate azobenzene .

[0040] Mix 0.25 g of myristate azobenzene and 0.75 g of myristyl alcohol to obtain a mixture, add 5 mL of dichloromethane to the mixture to completely dissolve, nitrogen purging and vacuum drying at room temperature to obtain an organic composite phase change energy storage material.

Embodiment 2

[0042] Preparation of azobenzene compound: myristate chloride is reacted to generate tetradecanoic acid chloride, tetradecanoic acid chloride is esterified with 4-(phenylazo)phenol, suction filtered and washed to obtain myristate azobenzene .

[0043] Mix 0.35 g of myristate azobenzene and 0.65 g of myristyl alcohol to obtain a mixture, add 5 mL of dichloromethane to the mixture to completely dissolve, nitrogen purging and vacuum drying at room temperature to obtain an organic composite phase change energy storage material.

Embodiment 3

[0045] Preparation of azobenzene compound: myristate chloride is reacted to generate tetradecanoic acid chloride, tetradecanoic acid chloride is esterified with 4-(phenylazo)phenol, suction filtered and washed to obtain myristate azobenzene .

[0046] Mix 0.45 g of myristate azobenzene and 0.55 g of myristyl alcohol to obtain a mixture, add 5 mL of dichloromethane to the mixture to completely dissolve, nitrogen purging and vacuum drying at room temperature to obtain an organic composite phase change energy storage material.

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Abstract

The invention discloses an organic composite phase change energy storage material and a preparation method and application thereof. The material consists of fatty alcohol and an azobenzene compound ina mass ratio of 55-75: 25-45. The azobenzene compound in the organic composite phase change energy storage material disclosed by the invention can change the structure from a trans configuration to acis configuration under the ultraviolet light irradiation condition, changes the steric repulsion force and dipole interaction, can change the phase state of the organic phase change material, enables the crystallization temperature of the organic composite phase change energy storage material to be lower than that of the original organic composite phase change energy storage material, and has alonger recovery half life, thereby obtaining the organic composite phase change energy storage material with adjustable crystallization temperature and energy storage density, adjusting the crystallization temperature, realizing long-term supercooling stability, and being prepared into a medium-term and long-term heat storage material for application.

Description

technical field [0001] The invention relates to the technical field of solar heat storage, and more specifically relates to an organic composite phase change energy storage material and a preparation method thereof, which has broad application prospects in medium and long-term thermal energy storage. Background technique [0002] Thermal energy storage offers great potential for a wide range of energy technologies. Phase change materials provide state-of-the-art thermal storage for high latent heat. When the phase change material is heated above the melting point, it stores latent heat energy, and when the temperature drops below the freezing point, it releases the stored energy and returns to the original phase state. Organic phase change materials, such as paraffin, fatty acids, fatty alcohols, and polyethylene glycols exhibit large latent heat of phase change and broad melting and freezing points. However, traditional organic phase change materials suffer from severe he...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06
CPCC09K5/063
Inventor 江艳黄金全小倩罗文
Owner GUANGDONG UNIV OF TECH
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