Synthesizing inorganic microcapsules of storing energy through phase change by using method of solution precipitation polymerization

A technology of inorganic phase change and precipitation polymerization, which is applied to the preparation of microcapsule preparations and microspheres, and can solve the problems of no similar or similar patent reports for phase change energy storage microcapsules

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

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Problems solved by technology

Obviously, there is no similar or similar patent report on the method of synthesizing phase change energy storage microcapsules by polymer solution precipitation polymerization

Method used

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  • Synthesizing inorganic microcapsules of storing energy through phase change by using method of solution precipitation polymerization

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Disperse the inorganic phase change core material at the required phase transition temperature in an organic solvent dissolved in a surfactant at a temperature above its phase transition temperature, add a metered monomer containing an initiator, and polymerize at a certain temperature, The polymer is deposited on the surface of the small particle or droplet of the inorganic phase change material to obtain the phase change microcapsule with the required phase change temperature. The specific phase change core material formula, polymer wrapping formula, process and results are shown in the table below.

[0031]

Program

Inorganic Phase Change Materials

Concentration%

anti supercooling agent

Concentration%

Antiphase separation agent

Concentration%

1

sodium sulfate decahydrate

95

Borax

3

polyethylene glycol

2

2

Sodium acetate trihydrate

96.5

...

Embodiment 2

[0036] Take 15-16 grams of calcium chloride hexahydrate, 0.1-0.2 grams of calcium hydroxide, and 0.5-07 grams of carboxymethyl cellulose for mixing. At a temperature of 40°C, disperse in 70-75 grams of butanone dissolved with 0.06 grams of OP-3 and 0.01 grams of OP-10, and then add monomers containing 0.02-0.07 grams of azobisisoheptanonitrile (styrene 10 -14 grams and 1-3 grams of divinylbenzene), control the temperature at 35°C to carry out polymerization, so that the polymer is deposited on the surface of the small particles or droplets of the inorganic phase change material, and the phase change microcapsules with a phase change temperature of 29°C are obtained. .

[0037] The above polymerization product was distilled off under reduced pressure to remove butanone. The dry powdery substance obtained is pure phase-change microcapsules. Disperse 40 grams of the above-mentioned microcapsules in 60 grams of 2D resin, then put the cotton knitted fabric into the above-mentione...

Embodiment 3

[0040] Taking the phase-change core material formulation, polymeric encapsulation formulation and microcapsule forming preparation process of Scheme 6 in Example 1, phase-change microcapsules with a phase transition temperature of 48°C were obtained.

[0041] The above polymerization product was distilled off under reduced pressure to remove butanone. The dry powdery substance obtained is pure phase-change microcapsules. Disperse 40 grams of the above-mentioned microcapsules in 1000 grams of 15% polyvinyl alcohol aqueous solution, and spin them with a wet spinning process to obtain vinylon composite fibers containing phase change materials. The fiber can be spun into a variety of temperature-adjusted fabrics with a phase transition temperature of 48°C.

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Abstract

A process for synthesizing the inorganic phase-change energy-accumulating microcapsules by solution deposition polymerizing method features that the water-soluble organic polyoxyvinylether as phase-change material, the vinyl or bivinyl monomers as the source of shell polymer, the organic solvent as medium, non-ionic surfactant as dispersing-protecting agent and the peroxide or azo compound as trigger take part in deposition polymerizing reaction at 20-100 deg.C to obtain said microcapsules.

Description

Technical field: [0001] The invention relates to a technique for synthesizing inorganic phase change energy storage microcapsules by adopting a polymer solution precipitation 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 decorati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/14
Inventor 于伟东章悦庭段武海
Owner DONGHUA UNIV
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