Method for reducing supercooling degree of alkane phase change microcapsule by using different shell materials, microcapsule prepared by method and application of microcapsule

Abstract

The invention belongs to the technical field of functional material preparation, and discloses a method for reducing the supercooling degree of an alkane phase change microcapsule by using different shell materials, the microcapsule prepared by the method and application of the microcapsule. The method comprises the following steps: preparing an intermediate phase, a continuous phase and a collection phase, respectively feeding a dispersed phase, the intermediate phase and the continuous phase into a micro-fluidic chip through an injection pump, and respectively introducing the dispersed phase, the intermediate phase and the continuous phase into the micro-fluidic chip from a small sharp-nose glass capillary tube, a first closed liquid storage tank and a second closed liquid storage tank; enabling the dispersed phase to flow out of the small sharp-nose glass capillary tube, to be wrapped by the intermediate phase and then flow into the small sharp-nose glass capillary tube under the flowing of the continuous phase, radiating an initiator in the intermediate phase by an ultraviolet lamp to initiate a polymerization reaction of a shell material, forming a thin film layer to wrap the phase change material, and obtaining the phase change microcapsule after drying. Precision control over particle size control and supercooling degree reduction of the phase change microcapsules is achieved, and the method is suitable for industrial production of the phase change microcapsules.

Description

technical field [0001] The invention belongs to the technical field of preparation of functional materials, and in particular relates to a method for reducing the supercooling degree of alkane phase-change microcapsules by using different shell materials, and the microcapsules produced therefrom and their application. Background technique [0002] Phase change materials have the characteristics of absorbing and releasing a large amount of latent heat during the liquid-solid phase transition process, and are good heat storage materials. They are widely used in latent heat storage of buildings and thermal control of electronic modules. Paraffin wax is the most widely used organic phase change material, with good economy, high enthalpy and wide application temperature range. However, the fluidity and amorphousness of paraffin often cause leakage during use, which is not conducive to its recycling. The use of microcapsule encapsulation technology can encapsulate paraffin phase ...

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the shortcomings and deficiencies of the preparation of phase change microcapsule nucleating agents in the prior art, such as the uneven distribution of the number of nucleating agents, complex processes, and the reduction of the enthalpy of the phase change microcapsules, the primary purpose of the present invention is to provide a method that utilizes different shell layers A method for reducing the supercooling degree of alkane phase-change microcapsules; the method uses microfluidic technology and ultraviolet lamp radiation to prepare phase-change microcapsules with different shell materials covering core materials, uniform particle size, and controllable structure, so as to achieve The purpose of reducing supercooling

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