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Preparation method of comb polymer phase change energy storage material

A technology of phase-change energy storage materials and comb-like polymers, applied in heat exchange materials, chemical instruments and methods, etc., can solve problems such as low heat enthalpy, poor processability of comb-like phase-change materials, and narrow application range , to achieve the effect of convenient and simple operation, high yield and overcoming flow leakage

Active Publication Date: 2017-02-15
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned preparation methods all use polyethylene glycol as the phase change energy storage material, and the application range of the obtained product is narrow, the enthalpy value is low, and the processability of the comb-shaped phase change material is poor.

Method used

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  • Preparation method of comb polymer phase change energy storage material
  • Preparation method of comb polymer phase change energy storage material
  • Preparation method of comb polymer phase change energy storage material

Examples

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Effect test

Embodiment 1

[0029] A preparation method of a comb polymer phase change energy storage material, comprising the steps of:

[0030] Add 3% of its mass of CaH to toluene 2 Carry out vacuum distillation to remove water, obtain anhydrous toluene for subsequent use;

[0031] Then the polyethylene grafted maleic anhydride and n-octadecyl alcohol of 1:2 are joined in the there-necked flask with mechanical stirring, thermometer, reflux condenser, nitrogen protection, then add catalyzer p-toluenesulfonic acid ( The consumption of p-toluenesulfonic acid is 5% of polyethylene graft maleic anhydride and n-octadecyl alcohol quality and), and toluene (the concentration of polyethylene graft maleic anhydride and n-octadecyl alcohol in toluene is 15wt%) , raised the temperature to 80°C, mechanically stirred and refluxed for 8 hours, cooled down, removed the solvent, washed, and dried to obtain a pure comb-like polymer phase-change energy storage material.

[0032] Using NETZSH DSC 200F3 differential sca...

Embodiment 2

[0038] Adjust the molar ratio of polyethylene grafted maleic anhydride to n-stearyl alcohol in Example 1 to be 1:1.5 and the rest of the conditions are the same as those in Example 1, and the properties of the prepared comb polymer phase-change energy storage material are listed in Table 1.

Embodiment 3

[0040] Adjust the molar ratio of polyethylene grafted maleic anhydride and n-octadecyl alcohol to 1:1 in Example 1, and the rest of the conditions are the same as in Example 1. The properties of the prepared comb polymer phase-change energy storage material are listed in Table 1.

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Abstract

The invention discloses a preparation method of a comb-shaped polymer phase change energy storage material. The preparation method comprises the following steps: 1) adding polyethylene grafted maleic anhydride and alcohol with a hydroxyl active group on a terminal group, ether with a hydroxyl active group on a terminal group or mercaptan with a sulfydryl active group on a terminal group which are in a molar ratio of 1 to (0.5-5) into a reaction container, in the presence of nitrogen gas, adding an organic solvent subjected to water removal and a catalyst, and reacting for 6-12 hours at 60-120 DEG C to obtain reaction primary products; 2) cooling the reaction primary products, and washing and drying after removing the solvent to obtain the comb-shaped polymer phase change energy storage material. The preparation method disclosed by the invention is fewer in side reactions, high in yield, high in reaction speed, and convenient and simple in preparation. The prepared comb-shaped polymer phase change energy storage material has good crystallization property, thermal stability, setting performance and machinable property.

Description

technical field [0001] The invention relates to the field of phase change materials, in particular to a preparation method of a comb polymer phase change energy storage material. Background technique [0002] Phase change energy storage material (PCM) refers to a substance that utilizes the heat absorbed or released when its own structure and state change to store energy. During the phase change process, a large amount of latent heat can be absorbed or released, while the temperature of the material itself remains unchanged. Therefore, the material has a wide range of applications in many fields such as intelligent temperature-adjusting clothing, solar energy utilization, building materials, and electronic devices. [0003] At present, the commonly used low-molecular-weight phase change materials include higher aliphatic alcohols, acids, esters, long-chain aliphatic hydrocarbons, and hydrated inorganic salts, etc., but they have high fluidity during phase transitions and are...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F255/02C08F8/14C08G81/02C09K5/02
Inventor 石海峰刘伦涛崔建平高亚辉王海霞张兴祥
Owner TIANJIN POLYTECHNIC UNIV
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