1 23 Iranian Polymer Journal ISSN 1026-1265 Volume 22 Number 5 Iran Polym J (2013) 22:335-340 DOI 10.1007/s13726-013-0132-8 Cellulose acetate–silica fume membrane: characterization and application for separation of starch and maltose Handajaya Rusli, Suryo Gandasasmita & Muhammad Bachri Amran