Adsorption of Poly(methyl methacrylate) on Nano-alumina and Bound Carbonyls

作者：Chen Yi Zhang; Zhang Jin Lin; Jia Ming Yin; Yu Jian; Guo Zhao Xia^*

来源：Chemical Journal of Chinese Universities, 2010, 31(10): 2093-2097.

• Alumina nanoparticle
• Poly(methyl methacrylate)
• Adsorption
• Bound carbonyl

The adsorption behavior of poly(methyl methacrylate) (PM MA) on the surface of alumina nanoparticles was studied, the amount of adsorbed PMMA was examined with thermal gravimetric analysis(TGA) and the fraction of bound carbonyls of adsorbed PMMA was determined using transmission Fourier transform infrared spectroscopy(FTIR). The adsorption curve has the form of Langmuir's isotherms. The carbonyl-stretching band of bound carbonyls shifts to lower wavenumbers because of the hydrogen bonding with aluminol groups. Curve fitting of the carbonyl-stretching region allowed the estimation of both the relative amounts and also the relative ratio of the absorption coefficients for the free and bound carbonyls. The fraction of bound carbonyls is 0. 3 at the maximum adsorption, indicating that PMMA adsorbed on nano-alumina is arranged in a flat fashion.

• 出版日期2010-10-10
• 单位清华大学