Multi-component net shell phase change microcapsule and preparation method thereof

Abstract

The invention discloses a multi-component netted shell phase change microcapsule. A capsule core is a low-melting-point fatty acid ester or paraffin hydrocarbon compound; a capsule wall is resin whichis formed by reacting polyisocyanate with polyamine, oil-soluble polyol and water-soluble polyol respectively and has a polyurea polyurethane multi-component net structure. The invention also discloses a preparation method of the phase change microcapsule. The preparation method comprises the steps as follows: emulsifying oil phase and water phase medium solutions, adding water-soluble polyol, then, conducting a heating reaction, finally, adding water-soluble polyol and performing a thermal reaction to obtain the phase change microcapsule. A shell is formed by introducing reactions among monomers from inside of interfaces, and the reaction monomers are promoted to react completely when the reaction ends; the multi-component netted shell phase change microcapsule is prepared by reacting aliphatic isophorone diisocyanate with diethylenetriamine, oil-soluble polypropylene glycol with larger molecular weight and water-soluble polyol respectively, and the crosslinking density of the microcapsule wall is increased, so that the compactness and stability of the capsule wall are enhanced.

Description

technical field [0001] The invention belongs to the technical field of preparation of phase-change materials, in particular to a phase-change microcapsule with a multi-component reticulated shell, and also to a preparation method of the phase-change microcapsule. Background technique [0002] Using the endothermic reaction of phase change materials during the phase change process, energy can be stored and utilized, but pure phase change materials are also limited during use, such as combining with matrix materials, being corrosive and easy to lose Due to its excellent heat storage performance, phase change microcapsules have become a research hotspot in the field of energy in recent decades, and are widely used in solar energy, building materials, textiles and clothing, and food packaging, etc. Related field. [0003] At present, the microcapsule products coated with phase change materials mainly use melamine formaldehyde resin and polyurea resin as the shell. Because the f...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a multi-component reticulated shell phase-change microcapsule and its preparation method, which can solve the problem of high permeability of the microcapsule wall prepared by the reaction of aliphatic isocyanate and diamine. During the process, a microcapsule wall with a multi-component network structure is formed, which improves the compactness and stability of the microcapsule wall and solves the problem of leakage of energy storage materials.

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