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Synthesis of SiO 2 /PS composite particles via emulsion polymerization
Author(s) -
Han Zhaorang,
Wang Li,
Zhu Jianmin,
Zhang Shufen,
Zhou Wei
Publication year - 2011
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.33404
Subject(s) - silanol , x ray photoelectron spectroscopy , dispersity , materials science , polystyrene , emulsion polymerization , composite number , scanning electron microscope , polymerization , transmission electron microscopy , chemical engineering , analytical chemistry (journal) , polymer chemistry , composite material , nanotechnology , chemistry , catalysis , polymer , organic chemistry , engineering
SiO 2 particles prepared by Stöber method were modified using 1,3,5,7‐tetravinyl‐1,3,5,7‐tetramethylcyclotetrasiloxane (Vi‐D 4 ), and SiO 2 /polystyrene (PS) composite particles with core‐shell structure were synthesized adopting mulsion polymerization of PS in a water–ethanol medium. The products were characterized by infrared spectra, X‐ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), and Zetasizer analyzer. The average diameter of SiO 2 particles prepared by Stöber method was about 80 nm, the SiO 2 particles were modified using the molar ratio of Vi‐D 4 and SiO 2 particles 1 : 10 (the dosage of Vi‐D 4 benever too much), and the size of modified silica particles was about 90 nm. The infrared spectra indicated that the Vi‐D 4 had bonded to the silanol groups on surface of SiO 2 particles, and XPS indicated the grafting efficiency of Vi‐D 4 on surface of SiO 2 particles had reached 90%. The infrared spectra indicated the PS had been incorporated with SiO 2 particles, and TEM indicated the composite particles have obvious core‐shell structure. The suitable size of SiO 2 particles should be lower than 200 nm, and the optimum volume ratio of ethanol and water should be 1 : 9 or 1 : 4. A kind of monodisperse SiO 2 /PS composite particles having function of self‐assembling was successfully and effectively synthesized. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011