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A kind of phase change microcapsule with polyurethane network structure and preparation method thereof

A technology of phase-change microcapsules and network structures, which is applied in the direction of microcapsule preparation, microsphere preparation, chemical instruments and methods, etc., can solve the problems of formaldehyde environmental protection, leakage of energy storage materials, etc., and achieve smooth and full surface of the shell, The effect of increased joint density and no depression

Active Publication Date: 2021-01-19
浙江烯纺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

[0008] The purpose of the present invention is to provide a phase-change microcapsule with a polyurethane network structure, which solves the environmental protection problem of formaldehyde in the in-situ polymerization, and at the same time, makes the process of forming the capsule wall easy to control and improves the surface morphology of the microcapsule. Generate a polyurethane capsule wall with a network structure, improve the compactness and stability of the microcapsule capsule wall, and solve the problem of leakage of energy storage materials

Method used

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  • A kind of phase change microcapsule with polyurethane network structure and preparation method thereof

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Effect test

Embodiment 1

[0043] A phase-change microcapsule with a polyurethane network structure, including two parts: a capsule core and a capsule wall. The capsule core is a fatty acid ester with a low melting point, and the capsule wall is a resin with a polyurethane network structure formed by the reaction of polyisocyanate and polyol. The capsule wall is preferably a polyurethane resin with a three-dimensional network structure formed by polymerizing a dibasic isocyanate and a polyol compound containing three hydroxyl groups; wherein the dibasic isocyanate is isophorone diisocyanate, and the polyol compound containing three hydroxyl groups Select triethanolamine for use.

[0044] The above-mentioned preparation method of the phase-change microcapsules with a polyurethane network structure is specifically implemented according to the following steps:

[0045] Step 1, preparing the oil phase medium solution, mixing the capsule core component and the polyisocyanate as the oil phase of the system, w...

Embodiment 2

[0054] A phase-change microcapsule with a polyurethane network structure, including two parts: a capsule core and a capsule wall. The capsule core is n-octadecane, and the capsule wall is a resin with a polyurethane network structure formed by the reaction of polyisocyanate and polyol. It is preferred to polymerize a dibasic isocyanate with a polyol compound containing three hydroxyl groups to form a polyurethane resin with a three-way network structure; wherein the dibasic isocyanate is hexamethylene diisocyanate, wherein the polyol compound containing three hydroxyl groups is preferably for glycerol;

[0055] Step 1, preparing an oil phase medium solution, mixing the capsule core component and polyisocyanate as the oil phase of the system, wherein the capsule core material is paraffin hydrocarbon compound; the mass ratio of polyisocyanate to capsule core component is 0.3:1.

[0056] Step 2, prepare the aqueous medium solution, weigh the distilled water according to the ratio...

Embodiment 3

[0064] A phase-change microcapsule with a polyurethane network structure, including two parts: a capsule core and a capsule wall. The capsule core is butyl stearate, and the capsule wall is a resin with a polyurethane network structure formed by the reaction of polyisocyanate and polyol. The wall is preferably a polyurethane resin with a three-dimensional network structure formed by polymerizing a dibasic isocyanate and a polyol compound containing three hydroxyl groups; wherein the dibasic isocyanate can be isophorone diisocyanate, wherein the polyol compound containing three hydroxyl groups , preferably triethanolamine.

[0065] Its preparation method is,

[0066] Step 1, preparing the oil phase medium solution, mixing the capsule core component and the polyisocyanate as the oil phase of the system, wherein the capsule core material is a fatty acid ester compound with a low melting point; the mass ratio of the polyisocyanate to the capsule core component is 0.2 :1.

[0067...

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Abstract

The invention discloses a phase-change microcapsule with a polyurethane net structure. The phase-change microcapsule comprises two parts, i.e., a capsule core and a capsule wall, wherein the capsule core is an aliphatic ester or paraffin hydrocarbon compound with a low melting point, and the capsule wall is resin with a polyurethane net structure formed by a reaction of polyisocyanate and polyol. The phase-change microcapsule overcomes environmental protection problems caused by formaldehyde during in-situ polymerization. The invention also discloses a preparation method for the phase-change microcapsule. The preparation method comprises the following concrete steps: step 1, preparing an oil-phase medium solution; step 2, preparing a water-phase medium solution; step 3, preparing an emulsification suspension: mixing the oil-phase medium solution prepared in the step 1 and the water-phase medium solution prepared in the step 2 and preparing the emulsification suspension under the action of a high-sheer emulsifying machine; step 4, subjecting the emulsification suspension prepared in the step 3 to a mixing reaction with water-soluble reaction monomers; and step 5, successively carrying out heating for a reaction, cooling and discharging so as to obtain the phase-change microcapsule with the polyurethane net structure.

Description

technical field [0001] The invention belongs to the technical field of preparation of phase change materials, and relates to a phase change microcapsule with a polyurethane network structure. The invention also relates to a preparation method of the microcapsule. Background technique [0002] Energy saving and environmental protection are one of the important topics in the field of modern energy. Using phase change energy storage materials to absorb or release a large amount of latent heat during the phase change process can achieve the purpose of adjusting the ambient temperature and saving energy. However, pure phase change materials are subject to many limitations in practical application. Therefore, how to properly process phase change microcapsules to achieve good energy storage has become a hot research topic in the field of energy. [0003] In 2004, the Chinese patent CN1513938 published the invention patent of Wang Lixin et al. This patent adopts the method of in-s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J13/14C09K5/06
CPCB01J13/14C09K5/063
Inventor 陆少锋辛成张晶申天伟
Owner 浙江烯纺新材料科技有限公司
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