Fabrication of hollow SiO_2 microsphere from SiOH-functionalized polymer latexes

The formation of hollow silica microspheres was achieved using PS templates by deposition and surface reaction coprecipitation.We investigated the effect of MPS and KPS on surface properties of the functionalized polymer latexes in depth using ξ potential and the FT-IR method.Core-sheath SiO2@PS microspheres was synthesized via miniemulsion polymerization using MPS as the functional comonomer and KPS as the initiator.The Si-OH concentrations were promoted when the polymer latexes was functionalized with KPS added.TEM measurements indicate an increase in SiO2 wall thickness with increasing the TEOS concentration and a 20-55nm thick silica layer could be deposited on the seed particles without loss of colloidal stability.