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Preparation method of polymer wrapped paraffin phase-change microsphere

A technology of phase-change microspheres and polymers, which is applied to the preparation of microspheres, microcapsule preparations, chemical instruments and methods, etc., can solve problems such as low encapsulation efficiency, complicated preparation technology, and high brittleness of wall materials, and achieve The preparation technology is simple, the encapsulation rate is high, and the effect of not being easily damaged

Inactive Publication Date: 2016-03-16
XIAOGAN JUHE NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Microencapsulation can solve the encapsulation problem of phase change materials very well, but there are problems such as complex preparation technology, high brittleness of wall materials, and low encapsulation efficiency

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] (1) Take 4kg of high-density polyethylene and add 6L of dimethylformamide, heat to 60°C, after the high-density polyethylene is dissolved, add 800g of Span 80, 400g of Tween 80, and 12kg of melted paraffin, and emulsify with an emulsifier , making paraffin-high-density polyethylene emulsion;

[0016] (2) Dissolve 1kg of polyvinyl alcohol and 0.1kg of sodium polyacrylate into 10L of water, add 0.8L of methanol, and raise the temperature to 80°C to obtain an aqueous precipitation solution;

[0017] (3) Add the paraffin-high-density polyethylene emulsion dropwise into the precipitation aqueous solution, stir, cool, centrifuge, and filter to obtain high-density polyethylene-coated paraffin phase-change microspheres.

Embodiment 2

[0019] (1) Take 3kg of polypropylene and add 7L of dimethylacetamide, heat to 60°C, after the polypropylene is dissolved, add 400g of Span 80, 400g of Tween 20, and 7kg of melted paraffin, emulsify with an emulsifier to obtain paraffin - polypropylene emulsion;

[0020] (2) Dissolve 0.1kg of polyvinyl alcohol and 0.8kg of sodium polyacrylate into 10L of water, add 1L of methanol, and raise the temperature to 80°C to obtain an aqueous precipitation solution;

[0021] (3) Add the paraffin-polypropylene emulsion dropwise into the precipitation aqueous solution, stir, cool, centrifuge, and filter to obtain the polypropylene-coated paraffin phase-change microspheres.

Embodiment 3

[0023] (1) Take 4kg of polyvinyl chloride and add 6L of dimethylformamide, heat to 60°C, after the polyvinyl chloride is dissolved, add 600g of Span 60, 400g of Tween 40, 10kg of melted paraffin, emulsify with an emulsifier, and make Obtain paraffin-polyvinyl chloride emulsion;

[0024] (2) Dissolve 0.8kg of polyvinyl alcohol and 0.4kg of sodium polyacrylate into 10L of water, add 0.5L of methanol, and raise the temperature to 85°C to obtain an aqueous solution of precipitation;

[0025] (3) Add the paraffin-polyvinyl chloride emulsion dropwise into the precipitation aqueous solution, stir, cool, centrifuge, and filter to obtain polyvinyl chloride-coated paraffin phase-change microspheres.

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Abstract

The invention discloses a method utilizing a phase inversion principle to prepare a polymer wrapped paraffin phase-change microsphere. The preparation method comprises the following steps: preparing paraffin-polymer emulsion, preparing a precipitate water solution, and dropwise adding the paraffin-polymer emulsion into the precipitate water solution. The preparation method has the advantages of simple technology and high encapsulation rate. The particle size of phase change microsphere is less than 100 [mu]m, and the microsphere cannot be easily damaged during the processing process. The prepared phase change microsphere can be used as a functional filling material, which can be used to produce phase change energy storing construction materials, phase change energy storing composite sheets, and the like.

Description

technical field [0001] The invention relates to the field of preparation of phase-change composite materials, in particular to a preparation method of polymer-coated paraffin wax phase-change microspheres. Background technique [0002] Energy is the material basis for the survival and development of human beings. With the depletion of coal, oil, natural gas and other mineral energy sources, the global energy crisis is intensifying. Energy conservation and efficient use of energy have become particularly important. Phase change material (PCM) is a functional material that can absorb or release latent heat, and has a wide range of applications in the field of energy storage and energy saving. Phase change materials can be divided into solid-solid phase change materials, solid-liquid phase change materials, solid-gas phase change materials and liquid-gas phase change materials according to the phase change form. Solid-liquid phase change materials have high energy storage densi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/02C09K5/06
CPCB01J13/02C09K5/063
Inventor 李明田本强
Owner XIAOGAN JUHE NEW MATERIAL TECH CO LTD
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