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Surface Modification of γ - Al2O3 nanoparticles by Electron Co-irradiation-induced Graft polymerization of MMA

Published online by Cambridge University Press:  01 February 2011

X. Xiang ,
X.T. Zu ,
Z.G. Wang  and
B. Jiang
X. Xiang
Affiliation:
Department of Applied Physics, University of Electronic and Technology of China, Chengdu, 610054, P. R. China
X.T. Zu*
Affiliation:
Department of Applied Physics, University of Electronic and Technology of China, Chengdu, 610054, P. R. China International Center for Material Physics, Chinese Academy of Sciences, Shenyang 110015, P. R. China
Z.G. Wang
Affiliation:
Department of Applied Physics, University of Electronic and Technology of China, Chengdu, 610054, P. R. China
B. Jiang
Affiliation:
Engineering Research Center in Biomedical Materials, Sichuan University, Chengdu, 610064, P. R. China
*
* Corresponding author. E-mail: zuxt@sohu.com
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Abstract

Electron beam co-irradiation graft polymerization has been carried out up to an absorbed dose of 30 kGy in air at room temperature between methyl methacrylate (MMA) monomer and γ- Al2O3 nanoparticles and micronparticles, respectively. The results showed that the percent graft of nano-Al2O3 and micron-Al2O3 is 6.4% and 0.9%, respectively. In the FT-IR spectra of irradiated nanoparticles, there was a new absorption peak at 1725 cm-1 that was attributed to carbonyl stretching vibration and Al-O-C bonds forming on the surface of nanoparitcle. But in the spectra of micron-Al2O3, the absorption peak at 1725 cm-1 was very weak. X-ray photoelectron spectroscopy (XPS) measurements confirmed the existence of carbonyl. The UV absorption intensities of two γ- Al2O3 powders strengthened after irradiation graft polymerization. These results showed that MMA has been successfully grafted onto nano-Al2O3 surface at the dose of 30 kGy. However, there were few new chemical bonds on micron-Al2O3 surface. It could be deduced that irradiation graft polymerization of γ- Al2O3 nanoparticles was easier than that of micronparticles.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 792: Symposium R – Radiation Effects and Ion Beam Processing of Materials , 2003 , R3.12
Copyright
Copyright © Materials Research Society 2004

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