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Synthesis of raspberry-like siO2/polystyrene nanocomposite particles via miniemulsion polymerization
Yilong Wang1, Hong Xu, Hongchen Gu
1National Key Laboratory of Nano/Micro Fabrication Technology, Key Laboratory for Thin Film and Microfabrication of Ministry of Education, Institute for Micro and Nano Science and Technology, Shanghai Jiaotong University, Shanghai, China.
Abstract:
Raspberry-like silica/polystyrene nanocomposite particles, silica particle as core and polystyrene nodules as shell, were synthesized through miniemulsion polymerization by using sodium dodecyl sulfate surfactant, hexadecane costabilizer in the presence of silica particles modified by methacryloxy(propyl)trimethoxysilane (MAPTMS) or n-octadecyltrimethoxysilane (ODMS). In this unique process, it was found that the raspberry-like silica/polystyrene nanocomposite particles could be obtained based on MAPTMS grafted silica particles at high grafted density 6.7 micromol/m2. And such nanocomposite particles could possess bigger shape stability due to coordinate effect of both the polymerizable group and hydrophobic interaction provided by MAPTMS molecules. Formation mechanism of the morphology was discussed.
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