화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.16, No.4, 517-522, July, 2010
DOI10.1016/j.jiec.2010.03.030  Export Citation
Surface modification of silica nanoparticles with hydrophilic polymers
Jung Tae Park, Jin Ah Seo, Sung Hoon Ahn, Jong Hak Kim†, and Sang Wook Kang1, †
  • Department of Chemical and Biomolecular Engineering, Yonsei University, 262 Seongsanno, Seodaemun-gu, Seoul 120-749, South Korea
  • 1Department of Chemistry, Sangmyung University, Seoul 110-743, South Korea
E-mail:,
Silica (SiO2) nanoparticles grafted with a water-soluble polymer, i.e. nonionic poly(oxyethylene methacrylate) (POEM) and ionic poly(styrene sulfonic acid) (PSSA) were prepared via a three-step synthetic approach: (1) the activation of silanol group (-OH) in the surface of SiO2 nanoparticles, (2) surface modification to chlorine (-Cl) group and (3) graft polymerization from nanoparticles via atom transfer radical polymerization (ATRP). The successful synthesis and chemical compositions in the modified SiO2 nanoparticles were confirmed using FT-IR, UV-visible spectroscopy and X-ray photoelectron spectroscopy (XPS). Thermogravimetric analysis (TGA) results indicated that the grafting amounts of polymer in the nanoparticles were 5 and 8 wt% for POEM and PSSA, respectively. X-ray diffraction (XRD) showed that the grafting of polymers did not significantly alter the microstructure of SiO2 nanoparticles. Grafting of water-soluble polymer improved the dispersion properties of nanoparticles in alcohol, as verified by scanning electron microscopy (SEM).
Keywords:Silica (SiO2);Nanoparticles;Atom transfer radical polymerization;(ATRP);Graft polymerization;Surface modification
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