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http://dx.doi.org/10.1016/j.jiec.2010.03.030

Surface modification of silica nanoparticles with hydrophilic polymers  

Park, Jung-Tae (Department of Chemical and Biomolecular Engineering, Yonsei University)
Seo, Jin-Ah (Department of Chemical and Biomolecular Engineering, Yonsei University)
Ahn, Sung-Hoon (Department of Chemical and Biomolecular Engineering, Yonsei University)
Kim, Jong-Hak (Department of Chemical and Biomolecular Engineering, Yonsei University)
Kang, Sang-Wook (Department of Chemistry, Sangmyung University)
Publication Information
Journal of Industrial and Engineering Chemistry / v.16, no.4, 2010 , pp. 517-522 More about this Journal
Abstract
Silica ($SiO_2$) 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 $SiO_2$ 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 $SiO_2$ 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 $SiO_2$ nanoparticles. Grafting of water-soluble polymer improved the dispersion properties of nanoparticles in alcohol, as verified by scanning electron microscopy (SEM).
Keywords
Silica ($SiO_2$); Nanoparticles; Atom transfer radical polymerization (ATRP); Graft polymerization; Surface modification;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
Times Cited By Web Of Science : 9  (Related Records In Web of Science)
Times Cited By SCOPUS : 5
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