Microenacapsulation of paraffin as energy storage material synthesized by in-situ polymerization

For heat energy storage application, urea-formaldehyde resin microcapsules containing phase change material, paraffin, were synthesized by in-situ polymerization. Observed the morphology and structure of microenacapsulation by scanning electron microscope(SEM), also analyzed the thermostability, latent heat and infrared spectrum by differential scanning calorimeter (DSC) and Fourier transform infrared spectrometer(FTIR). The experiments indicated that the microcapsules surface was smooth and dense, and the microcapsules had favorable thermostability and high latent heat; The surface was more smooth and dense as the polyvinyl alcohol(PVA) concentration near the critical micelle concentration(CMC).