A comparative study on silane modification of nano alumina

The alumina nanoparticles were modified using two individual coupling agents namely, aminopropyltriethoxysilane (γ-APS) and glycidoxypropyletrimethoxysilane (γ-GPS). The alumina nanoparticles were first hydrolyzed in mixture of ethanol/water followed by thermal dissolution each of coupling agents at 80 ˚C. The FTIR spectra indicated for the formation of the Si-O-Al bonds in 1050 cm-1. Besides, the results of the TGA showed lower degree of silane grafting for γ-GPS than γ-APS at 80 ˚C for 8 hours