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Dual-shell phase change stored energy micro-capsule and preparation method thereof

A phase change energy storage and microcapsule technology, applied in microcapsule preparations, microsphere preparation, chemical instruments and methods, etc., can solve the problems of lack of standards and specifications, few synthesis methods, and many evaluation indicators, and achieve the latent heat of phase change. High, uniform particle size, low cost effect

Inactive Publication Date: 2017-03-08
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, phase change microencapsulation also has a lot of needs to be improved, such as the ubiquitous supercooling phenomenon. In terms of material selection, the types of core materials that can be successfully embedded are relatively small; in terms of preparation, relatively mature synthesis methods are few; Complexity, high cost, and usually contain highly toxic chemical substances (such as formaldehyde, etc.) in the synthesis; in terms of product quality evaluation, there are many evaluation indicators, lack of unified standards and specifications, and there are defects such as expensive and time-consuming

Method used

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  • Dual-shell phase change stored energy micro-capsule and preparation method thereof
  • Dual-shell phase change stored energy micro-capsule and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0035] (1) Core material emulsification and polyurea wrapping: first heat n-octadecane to 60 ℃ Form the core material solution, then join 20 parts of the core material solution into 20 parts of deionized water dissolved with 0.15 part of toluene diisocyanate and 0.8 part of sodium dodecylbenzenesulfonate, stir Emulsified Emulsify for 20 min at 7000 r / min , then phacoemulsification 15 minutes to form a core emulsion, in 40 ℃ and The speed is 400 r / min Add 2.5 parts of ethylenediamine dropwise to the core material emulsion under the condition of mechanical stirring, and react after the dropwise addition 1 hour An aqueous solution of microcapsules wrapped in polyurea can be obtained;

[0036] (2) Preparation of monomer prepolymer: in at 40°C, Mix 10 parts of deionized water, compound reactive milk agent stir until well Dissolve to obtain emulsifier aqueous solution, then add 5 parts of methyl methacrylate, 5 parts of butyl acrylate and magnetically stir for 30 ...

Embodiment 2

[0039] (1) Core material emulsification and polyurea wrapping: first heat n-octadecane to 70 ℃ Form the core material solution, then join 30 parts of core material solution into 20 parts of deionized water that are dissolved with 0.2 part of toluene diisocyanate and 1.2 parts of sodium dodecylbenzene sulfonate, exist control Emulsify for 30 min at 8000 r / min , then phacoemulsified for 20 min to form a core emulsion, in 45 ℃ and The speed is 450r / min Add 3.75 parts of ethylenediamine dropwise to the core material emulsion under the condition of mechanical stirring, and react after the dropwise addition 1.5 hours can Obtain the aqueous solution of the microcapsule of polyurea wrapping;

[0040] (2) Preparation of monomer prepolymer: at 45 °C, Mix 25 parts of deionized water, compound reactive milk agent stir until well Dissolve to obtain emulsifier aqueous solution, then add 10 parts of methyl methacrylate, 10 parts of butyl acrylate and magnetically stir at...

Embodiment 3

[0043] (1) Core material emulsification and polyurea wrapping: first heat n-octadecane to 75 ℃ Form the core material solution, then join 35 parts of the core material solution into 30 parts of deionized water dissolved with 0.25 parts of toluene diisocyanate and 1.2 parts of sodium dodecylbenzenesulfonate, stir Emulsified Emulsify at 9000 r / min for 30 min , then phacoemulsification 20 minutes to form a core emulsion, in 50 ℃ and The speed is 450r / min Add 3.75 parts of ethylenediamine dropwise to the core material emulsion under the condition of mechanical stirring, and react after the dropwise addition 1.5 hours An aqueous solution of microcapsules wrapped in polyurea can be obtained;

[0044] (2) Preparation of monomer prepolymer: in at 50°C, Mix 30 parts of deionized water, compound reactive milk agent stir until well Dissolve to obtain emulsifier aqueous solution, then add 10 parts of methyl methacrylate, 10 parts of butyl acrylate and magnetically stir a...

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Abstract

The invention discloses a dual-shell phase change stored energy micro-capsule and a preparation method thereof. The method includes steps of heating and dissolving alkane to core solution, and then adding core solution to solution of cyanate ester and anionic emulsifier; after ultrasonic emulsification, dropwise adding diamine and forming micro-capsule water solution packed by polyuria; mixing and stirring a certain matching ratio of methyl methacrylate, butyl acrylate, compound emulsifier and de-ionized water to form prepolymer; and then adding the prepolymer to the micro-capsule water solution packed by polyurial; stirring and heating for a certain time, cooling; and then filtering and washing by a Buchner funnel; at last, vacuum-drying and obtaining the dual-shell phase change stored energy micro-capsule. The prepared n-alkane core material is completely packed by diamine and multifunctional cyanate ester used as an inner shell and polyacrylic resin used as an outer shell; the formed micro-capsule is free from poison, uniform in grain diameter, smooth in surface, and free from agglomeration.

Description

technical field [0001] The invention relates to the field of phase change materials, in particular to a double-shell phase change energy storage microcapsule and a preparation method thereof. [0002] technical background [0003] Energy is the driving force of social development, and almost all human activities are closely related to energy. Energy can be mainly divided into two categories: conventional energy with limited storage on the earth (fossil fuels such as coal, oil, and natural gas) and renewable energy that will not be exhausted (such as solar energy, water energy, biomass energy, wind energy, and energy from oceans and geothermal energy). energy, etc.). Today, most countries in the world mainly use conventional energy, which has limited reserves and is non-renewable in the short term, and the storage capacity will gradually decrease with the increase in use. However, with the development of society, human beings' demand for energy is increasing. In addition, hu...

Claims

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Application Information

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IPC IPC(8): C09K5/06C08F220/14C08F220/18C08F2/26C08F2/30C08G18/32B01J13/16
CPCB01J13/16C08F2/26C08F2/30C08F220/14C08F220/18C08F220/1804C08G18/3228C09K5/06
Inventor 袁文辉杨雄军李莉
Owner SOUTH CHINA UNIV OF TECH
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