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4709849 
Journal Article 
Investigation of Hollow Silica Spheres with Controllable Size and Shell Thickness 
Li Zhen; Wang Shu-Bin 
2011 
1 
Wuji Cailiao Xuebao
ISSN: 1000-324X 
26 
8 
885-891 
WOS:000295802700019 
Hollow silica spheres were synthesized by template/Sol-Gel approach, using cationic polystyrene (PS) as template and tetraethoxysilane (TEOS) as precursor. The void size of hollow silica sphere was decided by the diameter of their PS templates. Hollow silica spheres with controllable size between 0.71 mu m and 1.8 mu m were obtained by varying the parameters of polymerization (the monomer, the initiator, the stabilizer and the polarity of the dispersion medium). The shell thickness of hollow silica spheres could be easily changed in the range of 20 nm to 60 nm by changing the TEOS concentration from 0.4 mmol/L to 0.8 mmol/L. Both the size and shell thickness of hollow silica spheres have effects on their bulk density, the thermal conductivity and strength of materials. 
hollow silica spheres; controllable size; shell thickness; bulk density