Phase change energy storage microcapsule 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 problems such as high resistance to low temperature, poor mechanical strength, and easy breakage, and achieve good sealing, high heat storage capacity, and good compactness Effect

Inactive Publication Date: 2021-04-02
合肥瑞雪新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The phase-change energy storage microcapsules with high molecular polymer as the shell material have poor resistance to high and low temperatures; while the phas

Method used

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  • Phase change energy storage microcapsule and preparation method thereof
  • Phase change energy storage microcapsule and preparation method thereof
  • Phase change energy storage microcapsule and preparation method thereof

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preparation example Construction

[0033] The present invention also provides a preparation method of the phase change energy storage microcapsules described in the above technical solution, comprising the following steps:

[0034] mixing the emulsifier with water to obtain an aqueous phase;

[0035] Mix polyimide resin, n-alkane phase change material and volatile solvent to obtain oil phase;

[0036] The water phase and the oil phase are mixed and dispersed to obtain an oil-in-water emulsion;

[0037] The oil-in-water emulsion and the stabilizer are mixed and heated to obtain the phase-change energy storage microcapsules.

[0038] In the present invention, the emulsifier is mixed with water to obtain a water phase. In the present invention, the HLB value of the emulsifier is preferably 8 to 15; the emulsifier is further preferably styrene maleic anhydride copolymer sodium salt (SMA-Na), nonylphenol polyoxyethylene ether ammonium salt, Polyoxyethylene (20) sorbitan dioleate, sodium abietate, cocamidopropyl b...

Embodiment 1

[0048] Take 50 grams of mass concentration as 10% styrene-maleic anhydride copolymer sodium salt (SMA-Na) aqueous solution in a beaker, add deionized water to 100 grams, stir to make the emulsifier dissolve completely, and adjust the pH value with glacial acetic acid 4.0 to 5.0, to obtain an emulsifier aqueous solution with a mass concentration of 5% as the water phase;

[0049] At room temperature, add 15 grams of soluble polyimide powder (produced by DuPont, USA) and 100 grams of chloroform to a beaker and mix them until they are completely miscible, then add 60 grams of n-octadecane, stir, dissolve and mix well to obtain an oil phase ;

[0050] After the water phase was kept at 60°C for 15 minutes, the oil phase was added to the water phase and dispersed at a high speed of 5000rpm for 15 minutes to form a stable oil-in-water emulsion;

[0051] After the emulsification is over, reduce the rotation speed, add 20 grams of polyvinyl alcohol 1788 aqueous solution with a mass co...

Embodiment 2

[0054] Weigh 5 grams of sodium dodecylbenzenesulfonate in a beaker, add deionized water to 100 grams, stir to make the emulsifier completely dissolve, and prepare an emulsifier aqueous solution with a mass concentration of 5% as the water phase;

[0055] Add 20 grams of soluble polyimide (the soluble polyimide is shown in formula (1)) and 100 grams of chloroform in a beaker and mix, stir until completely miscible, add 80 grams of n-docosane, stir and dissolve Mix well to obtain the oil phase;

[0056]

[0057] After the water phase was kept at 60°C for 15 minutes, the oil phase was added to the water phase and dispersed at a high speed of 2500 rpm for 15 minutes to form a stable oil-in-water emulsion;

[0058] After the emulsification is over, reduce the rotation speed, add 40 grams of polyvinyl alcohol 2488 aqueous solution with a mass concentration of 5% to the above emulsion, transfer the emulsion to a device with distillation and recovery of organic solvents, stir, and ...

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Abstract

The invention provides a phase change energy storage microcapsule and a preparation method thereof, and belongs to the technical field of phase change energy storage. A shell material of the phase change energy storage microcapsule provided by the invention is polyimide resin, and a core material of the phase change energy storage microcapsule is an n-alkane phase change material. According to thephase change energy storage microcapsule disclosed by the invention, the polyimide resin is used as the shell material, and the n-alkane phase change material is used as the core material, so that the shell material of the phase change energy storage microcapsule is ultrathin, good in compactness, good in mechanical strength and thermal stability, controllable in particle size and high in phase change latent heat value; wide application prospects are realized in the fields of electronic device thermal interface materials, textile and clothing, solar energy storage and the like. The phase-change energy-storage microcapsules are prepared by adopting a solvent evaporation method, the operation is simple and convenient, the experiment and production conditions are easy to control, and the method has the advantages of stable system, small temperature change, recyclable solvent, low residue and the like, and is convenient for realizing large-scale production.

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] The phase-change energy storage microcapsules reported in existing literature and patents are divided into two types according to the shell material, one is made of urea-formaldehyde resin, melamine resin, melamine-formaldehyde resin, polyurethane, polyurea resin, epoxy resin, etc Molecular polymers are used as shell materials; one type uses inorganic materials such as silica, titanium dioxide, and calcium carbonate as shell materials. The phase-change energy storage microcapsules with high molecular polymer as the shell material have poor resistance to high and low temperatures; while the phase-change energy storage microcapsules with inorganic materials as the shell material have poor mechanical strength and toughness, and are easy to break during use ...

Claims

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Application Information

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IPC IPC(8): C09K5/06B01J13/12
CPCC09K5/063B01J13/125
Inventor 刘海生刘丙阳喻学锋刘保材
Owner 合肥瑞雪新材料科技有限公司
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