Yantaboot, K. and Maensiri, S. and Khansawai, Paveena and Amnuaypanich, Sittipong (2010) Surface Modification of Alumina Nano-Particles by UV-Induced Grafting Polymerization of 2-Hydroxyethyl Methacrylate. Advanced Materials Research .
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Alumina nano-particles was grafted with poly(2-hydroxyethyl methacrylate) (PHEMA) utilizing the sequential method; that is, the alumina surface was first rendered with initiator, benzophenone, by UV-irradiation followed by the grafting polymerization of HEMA on the surface which was initiated thermally and propagated via the free-radical polymerization. FT-IR spectroscopy confirmed the successful grafting of PHEMA onto the alumina surface. Determined by thermalgravimetry (TG), the amount of benzophenone on the alumina surface was found to increase with the UV-irradiation time; however upon grafting of PHEMA, the amount of grafted-PHEMA was the same irrespective of the reaction time. The glass transition temperature (Tg) of grafted-PHEMA on alumina particles was approximately 93 C that is higher than that of PHEMA which has Tg around 85 C. This indicates the more restricted movement of grafted-PHEMA compared with the ungrafted-PHEMA.
|Uncontrolled Keywords:||Alumina Nanoparticles, Grafting Polymerization, Poly(2-Hydroxyethyl Methacrylate), Surface Modification|
|Subjects:||Material Science > Nanofabrication processes and tools|
|Deposited On:||24 Sep 2010 12:07|
|Last Modified:||24 Sep 2010 12:07|
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