Determining influences of different stirring methods for encapsulating stearic acid with SiO₂ shell for thermal energy storage applications

Stearic acid was encapsulated successfully with SiO₂ shell in nanoscale by in situ emulsion interfacial hydrolysis and poly-condensation techniques. The inf luence of using different mixing techniques on these techniques was investigated. Morphologic, thermal and crystal structure analysis results show that the ultrasonic mixing technique is suggested for synthesis of SiO₂ nanocapsules. Ultrasonic vibrations lead to more homogeneous covering of the oil droplets without residuals by effectively orienting SiO₂ molecules during polymerization.