Preparation and Properties of High Coating Rate Phase Change Microcapsules

Abstract

AbstractPhase change materials can store and release energy according to the temperature changes of the surrounding environment, thereby improving energy utilization efficiency. Phase change microcapsules refer to tiny “containers” with a core-shell structure formed by high molecular polymers encapsulating phase change materials, which can effectively prevent leakage and volatilization of phase change materials while protecting the core material. In this study, a water/oil emulsification system was constructed, and phase change microcapsules with paraffin as the core material and silicon dioxide as the wall material were prepared by in-situ polymerization. Differential scanning calorimeter (DSC), scanning electron microscope (SEM) and Fourier infrared spectroscopy (FTIR) were used to characterize the structure and performance of phase change microcapsules. In addition, the influences of different drop accelerations of tetraethyl orthosilicate on the surface morphology and phase change performance of microcapsules were investigated. Moreover, the preparation process of inorganic wall materials-phase change microcapsules was optimized, providing a new method for the application of energy storage technology.KeywordsPhase change microcapsuleMorphologyencapsulationDropping acceleration