Preparation And Properties Of Paraffin Microcapsules And Thermal Energy Storage Research

With the development of society and technology, the demand for energy is growingconsidering the growing number of non-renewable energy consumption，searching newenergy sources and improving energy efficiency have become an important subject. Avariety of phase change materials (PCMs) are well known for their thermalcharacteristics. During their phase change stage, these compounds can absorb or releasethe latent heat while the temperature of the material is kept constant. One of the trend ofthis two past decades is microencapsulated PCMs (MicroPCMs), which enclosing PCMsin thin and resilient polymer shells so that the PCMs can be changed from solid to liquidand back again in the shells. In recent years, along with basic and application research ofMicroPCMs increasing, MicroPCMs have been applied to the field of energy storage andtemperature control.In this paper, microencapsulation containing paraffin with amino resins and polymer-inorganic shell is fabricated by in situ polymerization. The relationship betweenreaction conditions and the properties of microencapsulation were studied, in order tofind the key factors to control the optimal reaction conditions. Based on the preparationof the microcapsule, add some TEOS into the polymer for modifying microcapsule shellmaterial. The surface morphology, chemical structure and thermal properties ofmicro-encapsulations were investigated using FT-IR, SEM, TG and DSC. The resultsshowed that adding TEOS into the amino resins polymer in order to modify microcapsuleshell material, furthermore improve the compactness and stability of microcapsule shell,and increase the dispersity.With the heat exchanging model, test the effect of paraffin microcapsules for thermalenergy storage. Microcapsules filled in the cylindrical space, act as an insulation layer.The core of microcapsules is paraffin wax, which can absorb or release the latent heatduring their phase change stage, directly affect the temperature trend in the small cylinder.In contrast to air, sand and mineral wool insulation, microPCMs wall insulation materialshave greater thermal energy storage performance, which can be applied to the field ofenergy storage and temperature control. Finally, use the cylindrical device to test thermalconductivity, in line with the principle of the cylindrical wall of chemical steady heatconduction model, and the device is simple and low production costs.