title: Pervaporative dehydration characteristics of an ethanol/water azeotrope through various chitosan membranes.
abstract: The permeation and separation characteristics of an ethanol/water azeotrope through chitosan membranes of different molecular weights and degrees of deacetylation during pervaporation were investigated. The normalized permeation rate decreased with increasing molecular weight up to 90 kDa, but at over 90 kDa, the rate increased. On the other hand, the water/ethanol selectivity increased with increasing molecular weight up to 90 kDa but decreased at over 90 kDa. With increasing degree of deacetylation, the water/ethanol permselectivity increased significantly, but the normalized permeation rate decreased. The characteristics of chitosan membranes are discussed based on their chemical and physical structures such as the contact angle, density, degree of swelling, and glass transition temperature.
authors: Department of Chemistry and Materials Engineering and Organization for Research and Development of Innovative Science and Technology, Kansai University, 3-3-35 Yamate-cho, Suita 564-8680, Osaka, Japan. Electronic address: v701489@kansai-u.ac.jp.
authors: Tadashi
authors: T
authors: Uragami
authors: Department of Chemistry and Materials Engineering and Organization for Research and Development of Innovative Science and Technology, Kansai University, 3-3-35 Yamate-cho, Suita 564-8680, Osaka, Japan.
authors: Tomoyuki
authors: T
authors: Saito
authors: Department of Chemistry and Materials Engineering and Organization for Research and Development of Innovative Science and Technology, Kansai University, 3-3-35 Yamate-cho, Suita 564-8680, Osaka, Japan.
authors: Takashi
authors: T
authors: Miyata
mesh_terms: D000107:Acetylation; D048271:Chitosan / Q000737:chemistry*; D003681:Dehydration; D000431:Ethanol / Q000737:chemistry*; D008567:Membranes, Artificial; D008970:Molecular Weight; D014867:Water / Q000737:chemistry*
chemical_list: D008567:Membranes, Artificial; D014867:Water; D000431:Ethanol; D048271:Chitosan
keywords: Chitosan; Deacetylation; Dehydration; Ethanol/water azeotrope; Membrane; Molecular weight