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Shell encapsulated microcapsule phase change material as well as preparation method and application thereof

A phase change material, shell encapsulation technology, applied in the direction of heat exchange materials, chemical instruments and methods, etc., can solve problems such as inability to fully meet the actual needs of construction projects, unfavorable performance such as resistance to ion penetration, complex preparation processes, etc. The effect of small impact on strength development, low cost and simple operation process

Active Publication Date: 2022-05-10
HUBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned patents not only have the problems of relatively complicated preparation process and high cost of raw materials, but also because organic matter is selected as the raw material to prepare the microcapsule shell, the compatibility of the microcapsules with the cement-based inorganic materials used in the construction process is poor
[0005] The existence of the above problems will adversely affect the strength development and ion penetration resistance of building materials in the later stage, and then limit the application scenarios to a certain extent, and cannot fully meet the actual needs of construction projects.

Method used

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  • Shell encapsulated microcapsule phase change material as well as preparation method and application thereof
  • Shell encapsulated microcapsule phase change material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Add 1000g of ethanol solution into 500g of triethylamine, put it into a magnetic stirrer, stir and fuse to obtain product A, the stirring speed of the magnetic stirrer is 500r / min, and the stirring time is 15min. 10g of sodium carbonate and 10g of calcium chloride are added into the product A, and put into a wet mill for grinding treatment, and the wet mill adopts nitrogen to reach a constant temperature of 15 DEG C; Among them, the rotating speed of wet mill is 800r / min, the wet milling time is 2h, and the nitrogen rate is 18Nm. 3 / h, the wet grinding medium is zirconia. After grinding, product B is obtained, and the product B is put into a separatory funnel for filtering operation to separate solid from liquid. Add the filtered liquid into a three-necked flask, then add 5g microcrystalline paraffin, start magnetic stirring at a stirring speed of 300r / min, and the stirring time is 30min. Heat it in a water bath heating mode, raise the temperature to 40℃ at a heating rate o...

Embodiment 2

[0039] Add 1000g of ethanol solution into 750g of triethylamine, put it into a magnetic stirrer, stir and fuse to obtain product A, the stirring speed of the magnetic stirrer is 500r / min, and the stirring time is 15min. 10g of sodium carbonate and 10g of calcium nitrate are added into the product A, and put into a wet mill for grinding treatment, and the wet mill adopts nitrogen to reach a constant temperature of 15 DEG C; Among them, the rotating speed of wet mill is 800r / min, the wet milling time is 2h, and the nitrogen rate is 19Nm. 3 / h, the wet grinding medium is zirconia. After grinding, product B is obtained, and the product B is put into a separatory funnel for filtering operation to separate solid from liquid. Add the filtered liquid into a three-necked flask, then add 7.5g microcrystalline paraffin, start magnetic stirring at a stirring speed of 300r / min for 30min, heat it in a water bath heating mode, heat it to 40℃ at a heating rate of 5℃ / min, and keep it for 2 hours, ...

Embodiment 3

[0041] Add 1000g of ethanol solution into 1000g of triethylamine, put it into a magnetic stirrer, stir and fuse to obtain product A, the stirring speed of the magnetic stirrer is 500r / min, and the stirring time is 15min. 10g of sodium carbonate and 10g of calcium chloride are added into the product A, and put into a wet mill for grinding treatment, and the wet mill adopts nitrogen to reach a constant temperature of 15 DEG C; Among them, the speed of wet mill is 800r / min, the wet milling time is 2h, and the nitrogen rate is 20Nm. 3 / h, the wet grinding medium is zirconia. After grinding, product B is obtained, and the product B is put into a separatory funnel for filtering operation to separate solid from liquid. Adding the filtered liquid into a three-necked flask, then adding 10g microcrystalline paraffin, starting magnetic stirring at a stirring speed of 300r / min for 30min, heating in a water bath, heating to 40℃ at a heating rate of 5℃ / min, and keeping for 2 hours, and heating ...

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Abstract

The invention provides a preparation method of a shell encapsulated microcapsule phase change material, which comprises the following steps: firstly, stirring and fusing ethanol and triethylamine according to a certain proportion to obtain a product A; secondly, calcium salt and carbonate are added into the product A, wet grinding treatment is carried out, and a product B is obtained; thirdly, filtering the product B to obtain filtrate C; and finally, adding a phase change material into the filtrate C, stirring for a certain time, and heating to remove ethanol and triethylamine, thereby obtaining the shell encapsulated microcapsule phase change material. According to the microcapsule shell prepared by the method, inorganic raw materials are adopted, the growth of the microcapsule shell is promoted by utilizing a solvent environment of ethanol and triethylamine, and compared with a microcapsule shell prepared from an organic material, the prepared shell encapsulated microcapsule phase-change material has better compatibility in the process of adapting to a cement-based building material; the influence on the strength development of the later building material is small, and the actual requirements of building engineering in different application scenes can be better met.

Description

Technical field [0001] The invention belongs to the field of microcapsule phase change material preparation, in particular to a shell encapsulated microcapsule phase change material, a preparation method and application thereof. technical background [0002] With the rapid development of China's social economy and the acceleration of infrastructure construction, the corresponding building energy consumption is also increasing, resulting in a large amount of waste of resources. Phase change material is a kind of material that uses the heat absorbed or released during phase change to store latent heat. Compared with sensible heat storage, phase change material has the advantages of high energy storage density, high efficiency, heat absorption and heat release at approximately constant temperature, etc. Adding phase change materials into building materials can reduce indoor temperature fluctuation through the working performance of phase change materials, which can maximize the comf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06C04B24/36
CPCC09K5/063C04B40/0046C04B2103/0071C04B22/10C04B22/124C04B24/36Y02E60/14
Inventor 苏英翟高园叶祥星贺行洋代飞卢思宇刘森野朱梦迪王金付段晓鹏杨进王迎斌
Owner HUBEI UNIV OF TECH
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