Unsupported gamma-Al2O3 membranes prepared by the sol-gel method were chara
cterized to determine the effect of the addition of binders including polye
thylene glycol (PEG) and polyvinyl alcohol (PVA). The sol-gel method involv
ed the peptization of a boehmite (AlOOH) sol prepared from aluminum sec-but
oxide. The effect of the binder on surface area, pore size, and pore volume
was studied, as well as the amount of crack formation during drying of the
membranes. (C) 1999 Elsevier Science B.V. All rights reserved.