Synthesizing microcapsules of storing energy through phase change by using method of emulsion polymerization

A technology of phase change energy storage and microcapsules, which is applied to the preparation of microcapsule preparations and microspheres, etc.

Inactive Publication Date: 2005-11-16
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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  • Synthesizing microcapsules of storing energy through phase change by using method of emulsion polymerization

Examples

Experimental program
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Effect test

Embodiment 1

[0030] By adopting the process of the present invention, the organic phase change material with the required melting point is dispersed in the water dissolved with the surfactant at a temperature above its melting point, the initiator is added, and then the metered monomer is added. The monomer is diffused to the surface of the phase-change microparticles at a high temperature, and then polymerized to obtain the phase-change microcapsules at the required phase-change temperature. The formula, process and results of its concrete scheme are described in the following table.

[0031]

Example

phase change material

Concentration%

water

Concentration%

Emulsifier

Concentration%

Monomer

Concentration%

Initiator

Concentration%

1

stearyl alcohol

15

79.88

T80+MOA5

0.01+0.01

Styrene

5

Ammonium persulfate

0.1

2

Stearic ...

Embodiment 2

[0035] Disperse 15-25 grams of 30# phase-change paraffin in 80-100 grams of water containing 0.03 grams of surfactants OP10 and K12 and 0.15 grams of sodium bisulfite at 50 ° C, and then adjust the temperature to 35 ° C to make the paraffin in Paraffin particles dispersed in water into desired particle size. At this temperature, control the addition of monomers and oxidants, gradually add 5-7 grams of methyl methacrylate and 0.12 grams of potassium persulfate in water to polymerize the monomers on the surface of the paraffin wax, and obtain a phase transition temperature of 28-32 ℃, the emulsion of phase-change wax balls with a particle size of 0.5-0.7 microns.

[0036] Mix the above-mentioned emulsion directly with polyacrylate emulsion to replace the adhesive emulsion for spray-bonded cotton to obtain a non-manufactured cloth containing temperature phase-change materials. constant.

Embodiment 3

[0038] Disperse 15-20 grams of lauric acid in 100-120 grams of water containing 0.025 grams of surfactants MOA3 and OP15 at 50 ° C, and then adjust the temperature to 35 ° C to disperse the paraffin in the water into paraffin particles of the required particle size . Raise the temperature to 75°C, control the amount of monomers and initiators added, and gradually add 5-7 grams of styrene, 1-2 grams of divinylbenzene and 0.12 grams of potassium persulfate in water to polymerize the monomers on the surface of the paraffin wax to obtain The shell is an emulsion of insoluble and infusible phase-change wax balls with a phase-change temperature of 42-45° C. and a particle size of 0.6-0.8 microns.

[0039] The above-mentioned emulsion containing phase-change microcapsules is dried by spray drying to obtain dry powder of phase-change microcapsules. After the phase change microcapsule dry powder is blended with polyethylene, a polyethylene film containing thermal phase change microcap...

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Abstract

A process for synthesizing the phase-change energy-accumulating microcapsules by emulsion polymerizing method features that the liposoluble organic phase-change material, vinyl or bivinyl monomers, water, non-ionic or anionic surfactant and the persulfate, percarbonate, perborate, hydrogen peroxide, or their redox pair take part is core-shell polymerizing reaction in emulsion to obtain said microcapsules.

Description

Technical field: [0001] The invention relates to a technique for synthesizing phase-change energy storage microcapsules by adopting an emulsion core-shell polymerization method. Background technique: [0002] Phase-change energy storage materials are smart materials that improve energy utilization and can self-adaptively release and store heat, and have shown application prospects in environmental temperature regulation (Chen Aiying, Jiang Xueying, Cao Xuezeng. Research progress and application of phase-change energy storage materials . Materials Bulletin. 2003, 17(5): 42-44). Using phase-change energy storage materials to make building interior decoration materials can make full use of environmental energy and obtain the effect of warming in winter and cooling in summer (Liang Caihang and Huang Xiang, Application of phase-change materials in buildings. Building Thermal Ventilation and Air Conditioning. 2004, 23(4) :23-26). Used in the interior decoration of space stations...

Claims

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Application Information

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IPC IPC(8): B01J13/14
Inventor 于伟东章悦庭段武海
Owner DONGHUA UNIV
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