Phase change microcapsule and preparation method thereof

Abstract

The invention discloses a phase change microcapsule and a preparation method thereof. The phase change microcapsule comprises an oil-phase component and a water-phase component and is prepared by a free radical emulsion polymerization method; the oil-phase component comprises an alkane phase change material, a hydrophobic monofunctional vinyl monomer, a hydrophilic monofunctional vinyl monomer, a hydrophobic bifunctional vinyl monomer and an oil-soluble initiator; the water-phase component comprises an emulsifier, a suspending agent and deionized water; and the method comprises the following steps: mixing the oil-phase component with the water-phase component, and stirring at a high speed to prepare a uniform emulsion; and heating and stirring the emulsion, centrifugally filtering and separating the emulsion, washing with hot ethanol, separating and drying to constant weight to obtain phase change microcapsule powder. According to the preparation method, the vinyl monomer is adopted as a shell layer; no formaldehyde is released in use procedure; the phase change microcapsule is prepared by the free radical emulsion polymerization method; the phase change microcapsule is simple to operate, short in production cycle and simple in preparation process, and can be put into industrial production easily; the production cost is reduced; the particle size of the prepared phase change microcapsule is smaller than 10 microns; and the application range of the phase change microcapsule is expanded.

Description

technical field [0001] The invention relates to the field of energy storage materials and their preparation, in particular to a phase-change microcapsule and a preparation method thereof. Background technique [0002] With the depletion of petrochemical resources, people pay more and more attention to energy conservation and environmental protection in recent years, and the effective use of energy has become a hot spot for recent research by scientists. Phase change materials can absorb or release a large amount of heat energy when undergoing a phase change, so that they can regulate temperature and store energy within a certain temperature range. At present, there are a large number of research and applications on energy storage and temperature regulation of phase change materials, and its applications cover the fields of solar energy utilization, power peak regulation, waste heat recovery and utilization, energy saving of building air conditioners, and temperature regulati...

AI Technical Summary

Problems solved by technology

However, the use of formaldehyde-containing capsule wall synthetic microcapsules will release formaldehyde during use, and there are certain environmental hazards and safety hazards when used in the construction and clothing textile industries

The preparation method of existing phase-change microcapsules, the production technology is more complicated mostly, and the particle size of the prepared phase-change microcapsules is larger, and the microcapsule of larger particle size is more likely to be damaged in the process of processing, and, for Clothing and textiles will affect the aesthetics of the product. The preparation process needs to be reacted for a period of time, and then swelled for a period of time. The production cycle is long, the production efficiency is low, and the production cost is increased.

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