Double-layer coating solid inorganic phase change material micro-capsule and preparation method thereof

An inorganic phase change material, double-layer coating technology, applied in microcapsule preparation, microsphere preparation, heat exchange materials, etc., can solve the problem of insufficient strength of single-layer microcapsule phase change material, leakage pollution to the environment, and liquid leakage and other problems, to achieve the effect of alleviating the energy crisis, overcoming the easy leakage and polluting the environment, and increasing the strength

Inactive Publication Date: 2013-05-08
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] One of the purposes of the present invention is to provide a dual Layer encapsulation improves solid inorganic phase change material microcapsules
The double-layer coated solid inorganic phase change material microcapsules, during the phase change process, the inner core undergoe...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] A method for preparing double-layer coated solid inorganic phase change material microcapsules specifically includes the following steps:

[0045] (1) Preparation of single-layer coated solid inorganic phase change material microcapsules, that is, using polymethyl methacrylate as the inner wall material and a solid inorganic phase change material sodium sulfate decahydrate with a phase change temperature of 32.4℃ as the core Preparation of monolayer coated solid inorganic phase change material microcapsules by a phase separation method, which specifically includes the following steps:

[0046] ①. At room temperature, use an electronic balance to weigh out 1g of the inner wall material polymethyl methacrylate, and dissolve it with 10g of ethyl acetate under stirring with a constant temperature magnetic stirrer to prepare the inner wall material polymethyl methacrylate ethyl acetate Ester solution

[0047] The above-mentioned inner wall material polymethyl methacrylate and ethy...

Embodiment 2

[0063] A method for preparing double-layer coated solid inorganic phase change material microcapsules specifically includes the following steps:

[0064] (1) Preparation of single-layer coated solid inorganic phase change material microcapsules, that is, the solid inorganic phase change material sodium thiosulfate pentahydrate with polymethyl methacrylate as the inner wall material and the phase change temperature of 48℃ As the core material, a single-layer coated solid inorganic phase change material microcapsule is prepared by a phase separation method, which specifically includes the following steps:

[0065] ①. At room temperature, weigh 1 g of polymethyl methacrylate for the inner wall material on an electronic balance, and dissolve it with 10 g of ethyl acetate under stirring with a magnetic stirrer to prepare an ethyl acetate solution of polymethyl methacrylate for the inner wall material ;

[0066] The above-mentioned inner wall material polymethyl methacrylate and ethyl ace...

Embodiment 3

[0082] A method for preparing double-layer coated solid inorganic phase change material microcapsules specifically includes the following steps:

[0083] (1) Preparation of single-layer coated solid inorganic phase change material microcapsules, that is, polymethyl methacrylate is used as the inner wall material, and the phase change temperature is 58 ℃ solid inorganic phase change material sodium acetate trihydrate as the core Preparation of monolayer coated solid inorganic phase change material microcapsules by a phase separation method, which specifically includes the following steps:

[0084] ①. At room temperature, use an electronic balance to weigh 1.5 g of polymethyl methacrylate for the inner wall material, and dissolve it with 10 g of ethyl acetate under stirring with a magnetic stirrer to prepare the ethyl acetate of the inner wall material polymethyl methacrylate. Solution

[0085] The above-mentioned inner wall material polymethyl methacrylate and ethyl acetate are calcu...

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PUM

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Abstract

The invention discloses a double-layer coating solid inorganic phase change material micro-capsule and a preparation method thereof. The double-layer coating solid inorganic phase change material micro-capsule is prepared from the following methods of: firstly, with polymethyl methacrylate as an inner layer wall material and the solid inorganic phase change material as a core material, preparing a single-layer coating solid inorganic phase change material micro-capsule by a phase separation method; and then with polystyrene as an outer layer wall material and the prepared single coating solid inorganic phase change material micro-capsule as the core material, preparing the double-layer coating solid inorganic phase change material micro-capsule by the phase separation or a solvent evaporation method. The double-layer coating solid inorganic phase change material micro-capsule is simple in preparation method, the phase change temperature can be adjusted between 30 DEG C and 60 DEG C, and the enthalpy of phase change is up to 150kJ/kg at the most; by the double-layer coating, the strength of the solid inorganic phase change material micro-capsule is effectively enhanced and the problems of percolation and corrosion of the core material solid inorganic phase change material are solved.

Description

technical field [0001] The invention relates to a double-coated solid inorganic phase-change material microcapsule and a preparation method thereof, specifically a polymethyl methacrylate as an inner wall material, polystyrene as an outer wall material, and a solid The invention discloses a method for preparing solid inorganic phase-change material microcapsules in which the inorganic phase-change material is the core material. Background technique [0002] Solid inorganic phase change materials are mainly some crystalline hydrated salts, such as calcium chloride hexahydrate, sodium sulfate decahydrate, sodium carbonate decahydrate, sodium hydrogen phosphate dodecahydrate, sodium thiosulfate pentahydrate or sodium acetate trihydrate. It is usually an important class of phase change materials for medium and low temperature energy storage. It has the advantages of wide application range, relatively cheap price, large thermal conductivity, large latent heat, large volume heat s...

Claims

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Application Information

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IPC IPC(8): C09K5/06B01J13/06B01J13/04
Inventor 宋晓秋李月霞王景文肖吕俊
Owner SHANGHAI INST OF TECH
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