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Compound phase-change cold accumulation material and preparation method thereof

A cold storage material and composite phase change technology, applied in heat exchange materials, chemical instruments and methods, etc., can solve problems such as sudden drop in cold storage effect, damage to electronic devices, etc., achieve excellent cold preservation effect, convenient application, and good thawing effect Effect

Active Publication Date: 2018-04-06
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, in the field of phase change cold storage, ice or salt hydrate cold storage is widely used, but there are big problems in this cold storage method. Solid water or salt hydrate will produce a large amount of liquid during the phase transition process, due to convective heat transfer. Cold storage is less effective, and liquid from melting could damage electronics

Method used

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  • Compound phase-change cold accumulation material and preparation method thereof
  • Compound phase-change cold accumulation material and preparation method thereof
  • Compound phase-change cold accumulation material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Take polyethylene glycol (Mn=10000) and toluene with a mass ratio of 1:10 and heat them in a constant temperature water bath at 80°C until the polyethylene glycol is completely dissolved;

[0032] (2) Add triphenylmethane triisocyanate and 3 drops of dibutyltin dilaurate catalyst to the above solution in a molar ratio of 2:3 to polyethylene glycol, stir magnetically for 6 hours, and cross-link at 90°C. Pour it into a tetrafluoroethylene mold when it is viscous, and continue to cross-link at 90°C to form an organic three-dimensional network gel material containing toluene;

[0033] (3) Place the organic three-dimensional network gel material containing toluene in a sufficient amount of ethanol, sonicate for 2 hours, replace fresh ethanol and continue to sonicate twice, each time for 2 hours; then place the material in a sufficient amount of water, sonicate for 2 hours, After replacing fresh water, continue to sonicate twice, each time for 2 hours, to make the water a...

Embodiment 2-4

[0038] Change the mass ratio of polyethylene glycol (Mn=10000) to toluene to 1:5, 1:7, and 1:9 respectively to obtain the corresponding phase change cold storage gel material, and other conditions are consistent with Example 1. The measurement results show that the phase change enthalpy of the prepared phase change cold storage gel material reaches 250J / g.

Embodiment 5-6

[0040] N,N-dimethyl sulfoxide and ethylene glycol were used as low-temperature phase change materials to obtain corresponding phase change cold storage gel materials, and other conditions were consistent with those in Example 1.

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Abstract

The invention relates to a compound phase-change cold accumulation material and a preparation method thereof and belongs to the technical field of novel materials. The compound phase-change cold accumulation material is characterized in that the material is prepared by compounding an organic three-dimensional network gel material with a low-temperature phase-change material through a solvent displacement method, wherein the mass ratio of the organic three-dimensional network gel material to the low-temperature phase-change material is 1 to (5 to 10); the organic three-dimensional network gel material is prepared by crossly linking and polymerizing polyisocyanate and a polybasic alcohol polymer; the low-temperature phase-change material is water, N,N-dimethyl sulfoxide, ethylene glycol or awater solution of inorganic salt; the mass concentration of the water solution of the inorganic salt is 0.1 percent to 10 percent. The compound phase-change cold accumulation material and the preparation method thereof have the advantages of simple synthesis technology and convenience for application; the material has great phase-change enthalpy and long cold-keeping time; no liquid is leaked ina working process and the material can be repeatedly used and has a wide application prospect in the aspect of cold accumulation and cooling.

Description

technical field [0001] The invention relates to a composite phase change cold storage material and a preparation method thereof, belonging to the technical field of new materials. Background technique [0002] Phase change energy storage material is a material that absorbs or releases a large amount of heat through the process of physical phase transition (solid-liquid, liquid-gas, etc.) to realize energy storage and utilization. It has the advantages of high energy storage density and strong energy storage capacity. , can effectively alleviate the conflict between space and time imbalance in energy supply, and is one of the effective ways to improve energy utilization efficiency. [0003] Phase change materials can be divided into phase change heat storage materials and phase change cold storage materials according to their application scope. Phase change cold storage materials are in great demand in the fields of temperature-controlled clothing for high-temperature work, ...

Claims

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Application Information

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IPC IPC(8): C09K5/06C08G18/48C08G18/76
CPCC08G18/4825C08G18/4829C08G18/4833C08G18/4854C08G18/7664C09K5/066Y02E60/14
Inventor 唐炳涛张宇昂吕荣文张淑芬
Owner DALIAN UNIV OF TECH
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