Two kinds of hydrophilic polymers, poly(oxyethylene methacrylate) (POEM) and poly(styrene sulfonic acid) (PSSA), were grafted from TiO 2 nanoparticles via the surface-initiated atom transfer radical polymerization (ATRP) technique. Chlorine modified TiO 2 nanoparticles (TiO 2 -Cl), the ATRP initiators, were synthesized by the reaction of -OH in TiO 2 with 2-chloropropionyl chloride (CPC). FT-IR, UV-vis spectroscopy and X-ray photoelectron spectroscopy (XPS) clearly showed that the polymer chains were successfully grafted from the surface of TiO 2 nanoparticles. The hydrophilically modified TiO 2 nanoparticles have a better dispersion in alcohol than unmodified nanoparticles, as revealed by transmission electron microscopy (TEM). It was also found that the polymer grafting did not significantly alter the crystalline structure of the TiO 2 nanoparticles according to the X-ray diffraction (XRD) patterns. Grafting amounts were 10% of the weight for both TiO 2 -POEM and TiO 2 -PSSA nanoparticles, as determined by thermogravimetric analysis (TGA).
Bibliographical noteFunding Information:
This work was financially supported by the Korea Science and Engineering Foundation (KOSEF) grant funded by the Korea government (MEST) through Pioneer Research Program, and by the Ministry of Knowledge Economy (MKE) and Korea Industrial Technology Foundation (KOTEF) through the Human Resource Training Project for Strategic Technology.
All Science Journal Classification (ASJC) codes
- Condensed Matter Physics
- Physics and Astronomy(all)
- Surfaces and Interfaces
- Surfaces, Coatings and Films