A kind of phase change microcapsule and its preparation method and application

A technology of phase change microcapsules and phase change materials, which is applied in the direction of microcapsule preparation and microsphere preparation, and can solve the problems of uneven particle size of phase change microcapsules and uneven nucleation number distribution

Active Publication Date: 2021-05-11
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the disadvantages of inhomogeneous particle size and uneven distribution of nucleation number in the preparation of phase change microcapsules existing in the above existing methods, the purpose of the present invention is to provide a quantitative control method for the supercooling degree of phase change microcapsules

Method used

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  • A kind of phase change microcapsule and its preparation method and application

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Embodiment 1

[0030] 1. Preparation:

[0031] (1) Preparation of the dispersed phase of the microfluidic chip: weigh 10 g of octadecane, 0.3 g of isophorone diisocyanate, 0.15 g of 2,4-diisocyanate (TDI) and 0.01 g of , 0.03g, 0.05g and 0.1g of TiO 2 Add the nanoparticles into octadecane, stir evenly, put it into a high-power numerically controlled ultrasonic cleaner for 45 minutes, and ensure that octadecane, isophorone diisocyanate, TDI and TiO 2 The nanoparticles can be fully mixed uniformly, and the uniformly mixed mixed liquid obtained after ultrasonication is used as the dispersed phase.

[0032] (2) Preparation of the continuous phase of the microfluidic chip: Weigh 1 g of sodium dodecylbenzene sulfonate (SDBS) and pour it into 100 mL of deionized water. SDBS was evenly dispersed in deionized water, and the mixed solution obtained by stirring was used as the continuous phase.

[0033] (3) Preparation of the collection phase of the microfluidic chip: the collection phase included 1...

Embodiment 2

[0040] 1. Preparation:

[0041] (1) Preparation of the dispersed phase of the microfluidic chip: weigh 10 g of octadecane, 0.3 g of isophorone diisocyanate, 0.15 g of 2,4-diisocyanate (TDI) and 0.01 g of , 0.03g, 0.05g and 0.1g of TiO 2 Add the nanoparticles into octadecane, stir evenly, put it into a high-power numerically controlled ultrasonic cleaner for 45 minutes, and ensure that octadecane, isophorone diisocyanate, TDI and TiO 2 The nanoparticles can be fully mixed uniformly, and the uniformly mixed mixed liquid obtained after ultrasonication is used as the dispersed phase.

[0042] (2) Preparation of the continuous phase of the microfluidic chip: Weigh 1 g of sodium dodecylbenzene sulfonate (SDBS) and pour it into 100 mL of deionized water. SDBS was evenly dispersed in deionized water, and the mixed solution obtained by stirring was used as the continuous phase.

[0043] (3) Preparation of the collection phase of the microfluidic chip: the collection phase included 1...

Embodiment 3

[0050] 1. Preparation:

[0051] (1) Preparation of the dispersed phase of the microfluidic chip: weigh 10 g of octadecane, 0.3 g of isophorone diisocyanate, 0.15 g of 2,4-diisocyanate (TDI) and 0.01 g of , 0.03g, 0.05g and 0.1g of TiO 2 Add the nanoparticles into the octadecane, stir evenly, put it into a high-power numerically controlled ultrasonic cleaner and sonicate for 45 minutes to ensure that the octadecane, isophorone diisocyanate, TDI and ZnO nanoparticles can be fully mixed evenly, and the obtained The homogeneous mixture is used as the dispersed phase.

[0052] (2) Preparation of the continuous phase of the microfluidic chip: Weigh 1 g of sodium dodecylbenzene sulfonate (SDBS) and pour it into 100 mL of deionized water. SDBS was evenly dispersed in deionized water, and the mixed solution obtained by stirring was used as the continuous phase.

[0053] (3) Preparation of the collection phase of the microfluidic chip: the collection phase included 100 mL of deionize...

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Abstract

The invention belongs to the technical field of microcapsule materials, and discloses a phase-change microcapsule and its preparation method and application. The phase change microcapsules are firstly prepared with a dispersed phase, a continuous phase and a collection phase, and then based on two identical axial flow microfluidic chips, by adjusting the flow rates of the dispersed phase and the continuous phase, the dispersed phase passes through the end of the microfluidic chip. Into the collection phase, the 2,4-diisocyanate in the dispersed phase and the diethylenetriamine in the collection phase react on the surface of the droplet, and the resulting polyurea polymer film layer will be mixed with a phase change material of nanoparticles Encapsulation; after drying, phase-change microcapsules with uniform particle size, stable shell, and nano-particles in the core material are obtained. The precise control of the particle size of the phase change microcapsule is realized, and it is suitable for the industrial production of the phase change microcapsule.

Description

technical field [0001] The invention belongs to the technical field of microcapsule materials, and more specifically relates to a phase change microcapsule and its preparation method and application. Background technique [0002] In the process of utilizing phase change energy storage materials, in order to prevent the interaction between phase change materials and the outside world, microencapsulation technology is usually used to cover phase change materials with polymers to form a stable core-shell structure. Phase change microcapsules. As a new type of heat transfer medium, phase change microcapsules have the advantages of large heat storage energy, large specific surface area, and high heat exchange efficiency. However, after the organic phase change materials with different carbon numbers represented by paraffins and alkanes become the core material of the phase change microcapsules, when the phase change materials change from liquid to solid, the crystallization temp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J13/02
CPCB01J13/02
Inventor 贾莉斯崔卫陈颖李俊李亦昂莫松平常包虎曾宪瀚
Owner GUANGDONG UNIV OF TECH
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