synthesis and characterization of microencapsulated phase change materials by using the sol-gel method
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1Faculty of Chemical Engineering, Process Engineering Department, Tarbiat Modares University, Tehran, Iran
2Faculty of Chemical Engineering, Process Engineering Department, Tarbiat Modares University
3Postdoctoral Research Follow at University of Twente
Microencapsulated palmitic acid with titanium dioxide shell was synthesized by a sol-gel method in the PH value of 9-10. In this study, investigated the effect of different titania precursors on encapsulation ratio and encapsulation efficiency. Tetra-n-butyl titanate and titanium tetra isopropoxide as precursors were used that the encapsulation ratio was 53.557 and 73.041 and also the encapsulation efficiency between 54.058 and 70.942. The chemical structure and thermal properties were determined by Fourier transformation infrared spectroscopy (FTIR) and Differential scanning calorimeter (DSC). The results demonstrated that palmitic acid was well microencapsulated in titania shell. Based on the results palmitic acid microcapsules are good materials for thermal energy storage at 50-60 ° C.
microencapsulated; Palmitic acid; TiO2; sol-gel method; Encapsulation ratio; Encapsulation efficiency