Document Type: Research Paper
Department of Chemistry and Materials Engineering, Kansai University, Suita, Osaka 564-8680, Japan
Organization for Research and Development of Innovative Science and Technology, Kansai University, Suita, Osaka 564-8680, Japan
This paper focuses on the effects of the addition of an ionic liquid, 1-Allyl-3-butylimidazilium bis(trifluoromethane sulfonyl)imide ([ABIM]TFSI), which has a high affinity for benzene, into the poly(vinyl chloride) (PVC) membrane on the pervaporation characteristics of the removal of benzene from aqueous solutions of dilute benzene. When aqueous solutions of 100～500 ppm benzene were permeated through the [ABIM]TFSI)/PVC membranes, they showed a high benzene/water selectivity and permeability of these membranes was enhanced with increasing [ABIM]TFSI content significantly. These pervaporation characteristics are discussed from the viewpoint of chemical and physical structure of [ABIM]TFSI)/PVC membranes in detail. The mechanism of permeation and separation was analyzed by the solution-diffusion model.