Abstract
Alumina puiverizea in n-nexane ana n-hexane solution of cetanol, or octaaecyltrletnoxysilane were investigated through microanalysis, dispersive property into various media, Fourier transform infrared spectroscopy (FT-IR) and pyrolysis. The followings were found; (1) The surface property of Al2O3 pulverized in n-hexane showed to be hydrophilic, exactly the same as that of those unpulverized. (2) The surface property of Al2O3 pulverized in n-hexane solution of cetanol showed to be hydrophilic, but more hydrophobic than that of those unpulverized. These properties were confirmed to be caused by their surfaces composed of alcoxy surface group and equimolar hydroxyl group. (3) The surface properties of Al2O3 pulverized in n-hexane solution of octadecyltriethoxysilane showed to be hydrophobic(lyophilic), so that not dispersive into water, but float on water like an oil. (4) The surface-treatment of Al2O3 was confirmed to be performed by formation of surface group through reaction due to surface radicals produced by their pulverization.
