聚二甲基硅氧烷（PDMS）复合膜

Abstract(#br)A novel tri-layer composite membrane consisting of the active layer polydimethylsiloxane (PDMS, Sylgard ® 184) and dual support layers of high porosity polyethylene (PE) and high mechanical stiffness perforated metal was investigated for the separation of 1-butanol from aqueous solution by means of pervaporation. The experimental data show that total flux and separation factor are both increased by placing a layer of hydrophobic PE between the PDMS and the metal support. The enhancement is especially obvious at low temperatures.

Abstract(#br)Butanol has potential to become an important renewable transportation fuel and feedstock chemical in the future. However, low yield and high separation costs are the main obstacles in feasible industrial scale biobutanol production by the acetone–butanol–ethanol (ABE) fermentation process. Both problems can be overcome by using pervaporation as the product removal technique. The performance of a polydimethylsiloxane (PDMS) membrane with a support layer of polyacrylonitrile (PAN) was studied for the removal of acetone, butanol and ethanol from dilute aqueous model solutions.