纳滤

Abstract(#br)Four tailor-made flat composite membranes of poly(vinylideneflouride) (PVDF) as a support and polydimethylsiloxane (PDMS) or cellulose acetate (CA) as coating layer, and a commercially available composite membrane (Solsep 030306) were used to remove hexane and free fatty acid (FFA) from crude soybean oil–hexane mixture. The effects of transmembrane pressure (Δ p =10–20\u003cce:hsp sp=\"0.25\"/\u003ebar), temperature ( T =30–50\u003cce:hsp sp=\"0.25\"/\u003e°C) and feed oil concentration ( C f =10–35 w/w%) on membrane selectivity and permeation flux were determined.

Abstract(#br)In this paper grafting of mesoporous γ-alumina membranes with monovinyl terminated polydimethylsiloxane (PDMS), using 3-mercaptopropyltriethoxysilane (MPTES) as a linking agent, is described. The grafting performance of the organic moieties on γ-alumina powders was studied by FTIR. Contact angle measurements and solvent permeability tests were used to characterize the membrane properties. The results indicated that grafting reactions were successfully carried out.