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Superhydrophobic phase change energy storage material microcapsule and preparation method thereof

A technology of phase-change energy storage materials and microcapsules, which is applied in the field of phase-change energy storage material microcapsules and its preparation, and in the field of phase-change energy storage material microcapsules, which can solve corrosion, unstable chemical properties, and poor thermal conductivity, etc. problems, achieve the effects of improving surface roughness, wide application fields, excellent packaging and protection effects

Active Publication Date: 2019-03-22
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although phase change materials can improve energy utilization, their own shortcomings such as poor thermal conductivity, corrosion and chemical instability limit their applications during use.

Method used

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  • Superhydrophobic phase change energy storage material microcapsule and preparation method thereof
  • Superhydrophobic phase change energy storage material microcapsule and preparation method thereof
  • Superhydrophobic phase change energy storage material microcapsule and preparation method thereof

Examples

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Effect test

Embodiment 1

[0035] (1) Synthesis of organic phase change materials coated with inorganic wall materials in the inner layer

[0036] In a 250ml three-necked flask, 5.0g tetraethyl orthosilicate and 5.0g n-docosane were dispersed for 1h at a mechanical stirring rate of 500rpm to form a uniform oil phase; subsequently, 0.8g of cationic surfactant hexadecyl Dissolve trimethylammonium bromide in 60ml of formamide and add it to the three-necked flask, keep the temperature and stirring rate constant to form a uniform and stable oil-in-water emulsion; after emulsifying for 4 hours, slowly add 60ml of 0.8M hydrochloric acid aqueous solution In the mixed emulsion, continue to react at 60°C for 7h, then move to a constant temperature water bath, and age at 50°C for 12h; finally, the product is washed with deionized water, filtered and dried at room temperature to obtain silica phase change material microcapsules.

[0037] (2) Synthesis of zinc oxide shell layer

[0038] 5.0 g of the microcapsules s...

Embodiment 2

[0042] (1) Synthesis of organic phase change materials coated with inorganic wall materials in the inner layer

[0043] In a 250ml three-necked flask, 5.0g of n-butyl titanate and 5.0g of n-docosane were dispersed for 1h at a mechanical stirring rate of 500rpm to form a uniform oil phase; subsequently, 0.5g of anionic surfactant dodecyl Sodium sulfate was dissolved in 60ml of formamide and added to the above-mentioned three-neck flask, keeping the temperature and stirring rate constant to form a uniform and stable oil-in-water emulsion; after emulsification for 4 hours, prepare a mixed solution of 1mL deionized water and 30mL formamide, and Slowly add to the above mixed emulsion, keep the stirring rate constant, continue to stir and react for 8 hours, then move to a constant temperature water bath, and age at 50°C for 12 hours; finally, the product is washed with deionized water, filtered and dried at room temperature to obtain titanium dioxide phase change material micropartic...

Embodiment 3

[0049] (1) Synthesis of organic phase change materials coated with inorganic wall materials in the inner layer

[0050] In a 250ml three-necked flask, 5.0g of zirconium n-propoxide and 5.0g of n-docosane were dispersed at a mechanical stirring rate of 500rpm for 1h to form a uniform oil phase; subsequently, 1.0g of nonionic surfactant Span 60 was dissolved Add 100ml of formamide into the three-necked flask above, keep the temperature and stirring rate constant to form a uniform and stable oil-in-water emulsion; after emulsifying for 4 hours, prepare a mixture of 25mL of deionized water and 25mL of formamide, and slowly add the above In the mixed emulsion, keep the stirring rate constant, continue to stir and react for 8 hours, then move to a constant temperature water bath, and age at 50°C for 12 hours; finally, the product is washed with deionized water, filtered and dried at room temperature to obtain zirconia phase change material microcapsules.

[0051] (2) Synthesis of zi...

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Abstract

The invention relates to a superhydrophobic phase change energy storage material microcapsule and a preparation method thereof, belonging to the technical field of phase change energy storage materials. The microcapsule consists of an organic phase change material core, an inorganic oxide inner layer shell and a nano flower-like zinc oxide outer shell layer, and has a 'core-shell' structure; the preparation method comprises the steps of preparing an organic phase change material microcapsule coated with the inorganic oxide inner layer shell by using an emulsion template interfacial polymerization method; then, under the action of a surfactant, a structure inducer and a pH regulator, constructing a rough surface formed by the nano flower-like zinc oxide outer shell layer by means of hydrolysis of a zinc source and by inducing zinc ions to nucleate and crystallize on the surface of the inner shell layer of the microcapsule; modifying the surface of the nano flower-like zinc oxide outer shell layer with a halogen-free low surface energy modifier so as to obtain a superhydrophobic property with a static water contact angle of 160 degrees or more. The phase change material microcapsuleprovided by the invention is used for thermal energy storage, thermal temperature regulation and thermal management, and has the characteristics of being self-cleaning, anti-fouling, efficient in lubrication and environmentally-friendly, and the like.

Description

technical field [0001] The invention relates to a phase change energy storage material microcapsule, in particular to a phase change energy storage material microcapsule with a superhydrophobic function and a preparation method thereof, belonging to the technical field of phase change energy storage materials. Background technique [0002] Energy is the basis for the survival and development of human society. The development and utilization of new energy can meet the various needs of human beings from basic survival to social and economic development. However, with the rapid development of global industry, the supply of fossil energy (such as oil, coal, natural gas, etc.) has become increasingly scarce, and it has gradually become a bottleneck restricting social and economic development. How to improve energy utilization efficiency and develop and apply renewable energy has become an important issue facing mankind. Energy storage materials play a vital role in the sustainab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/04C09K5/06
CPCB01J13/04C09K5/06Y02E70/30
Inventor 汪晓东孙朝孙坤武德珍
Owner BEIJING UNIV OF CHEM TECH
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