Surface modification of silica nanoparticles with hydrophilic polymers

Jung Tae Park, Jin Ah Seo, Sung Hoon Ahn, Jong Hak Kim, Sang Wook Kang

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89 Citations (Scopus)

Abstract

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 8wt% 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).

Original languageEnglish
Pages (from-to)517-522
Number of pages6
JournalJournal of Industrial and Engineering Chemistry
Volume16
Issue number4
DOIs
Publication statusPublished - 2010 Jul 1

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All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)

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