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Phase-change energy storage microcapsules and preparation method thereof

A technology of phase-change energy storage and microcapsules, which is applied in the field of phase-change energy storage, can solve the problems of poor stability, easy failure of phase-change energy storage microcapsules, and short service life, and achieve good stability, thermal shock buffer, and The effect of improving the service life of the cooling cycle

Active Publication Date: 2013-03-20
领致热能新电器(江苏)股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is: the existing phase change energy storage microcapsules are prone to failure, short service life and poor stability, so as to provide a phase change energy storage microcapsule that is not easy to fail, has a long service life and good stability. capsule

Method used

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  • Phase-change energy storage microcapsules and preparation method thereof
  • Phase-change energy storage microcapsules and preparation method thereof

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preparation example Construction

[0036] (1) Preparation of sub-microcapsules

[0037] Mix and emulsify the second phase change material, the prepolymer solution of the second wall capsule, and the emulsifier to form an emulsion; then place the emulsion in a constant temperature water bath, perform demulsification and filtration after the reaction is complete, and obtain a precipitate, and cleaning and drying the precipitate to obtain sub-microcapsules in which the second wall capsule wraps the second phase change material;

[0038] (2) Coating with the first phase change material

[0039]Dispersing the sub-microcapsules prepared in the above step (1) into the liquid first phase change material, stirring to form a uniform dispersion solution of sub-microcapsules;

[0040] (3) Preparation of the first wall capsule

[0041] Mix the uniform dispersion solution prepared in step (2), the prepolymer solution of the first wall capsule, and the emulsifier, and stir until uniformly mixed; then put the mixed solution ...

Embodiment 1

[0059] First, mix 10g of n-eicosane, 10g of styrene, and 0.1g of azobisisobutyronitrile at 45°C to form an oil phase; mix 0.1g of sodium dodecylbenzenesulfonate with 100g of water to form water box. Then the above oil phase and water phase are mixed and emulsified, the mechanical stirring speed is 350r / min, and the stirring time is 15min. , the water bath time is 8h. Cool naturally after the reaction is complete, then add saturated NaCl solution to the above cooling liquid, and filter until the solution has obvious flocculent precipitate or paste to obtain the precipitate. Then the precipitate was washed three times with distilled water and twice with absolute ethanol. After washing, vacuum-dry at 40° C. for 36 hours to obtain daughter microcapsules. It is determined that the average particle diameter of the sub-microcapsules is 100nm, and the average thickness of the second wall capsule is 20nm.

[0060] Melt 15g of n-heptadecane into a liquid, then disperse the obtained ...

Embodiment 2

[0062] First, 10 g of styrene, 10 g of n-nonadecane, 0.1 g of azobisisobutyronitrile, 0.1 g of sodium dodecylbenzenesulfonate, and 100 g of water were mixed and emulsified at 40°C to form an emulsion. Mechanical stirring and ultrasonic treatment were carried out during the emulsification process, the mechanical stirring speed was 350r / min, and the stirring time was 30min; the ultrasonic frequency was 28kHz, and the ultrasonic time was 1.5min. Then place the formed emulsion in a constant temperature water bath at 70°C, and the reaction time is 8 hours; after the reaction is complete, it is naturally cooled; then add saturated NaCl solution to the above cooling solution until the solution appears obvious flocculent precipitate or paste Filtration was carried out to obtain a precipitate; then the obtained precipitate was washed; wherein the distilled water was washed 3 times, and the anhydrous ethanol was washed 2 times. After washing, vacuum drying was carried out at 40° C. for ...

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Abstract

The invention provides phase-change energy storage microcapsules comprising a first phase-change material, a first wall capsules coated on the first phase-change material, and sub-microcapsules distributed in the first phase-change material. The sub-microcapsules comprise a second phase-change material and second wall capsules coated on the second phase-change material. Also, the invention provides a method for preparing the phase-change energy storage microcapsules provided by the invention. The method comprises the steps such as sub-microcapsule preparation, first phase-change material coating, first wall capsule preparation, and the like. The phase-change energy storage microcapsules provided by the invention have the advantages of failure resistance, long service life, and good stability.

Description

technical field [0001] The invention relates to the technical field of phase change energy storage, in particular to a phase change energy storage microcapsule and a preparation method thereof. Background technique [0002] Phase change energy storage is a latent heat energy storage method, which uses the endothermic and exothermic effects of materials during the phase change process to store and release thermal energy, and has the advantages of high energy storage density and constant temperature. Since the phase change material becomes liquid after melting, it is amorphous, and if it is not shaped or wrapped, it will cause leakage problems during use. Therefore, the phase change material is generally encapsulated in microcapsules to form phase change energy storage microcapsules. . Due to the advantages of phase change energy storage microcapsules, which can increase the specific surface area and thermal conductivity of phase change materials, improve the stability of pha...

Claims

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Application Information

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IPC IPC(8): C09K5/06B01J13/14
Inventor 郑道勇朱俊虹
Owner 领致热能新电器(江苏)股份有限公司
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