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Pwevaporation Separation of Aqueous Ethanol Solution Through Poly(vinyl alcohol) Membranes Crosslinked Poly(acrylic acid-co-maleic acid)  

남상용 (국립경상대학교 공과대학 고분자공학과)
성경수 (한남대학교 공과대학 화학공학과)
천세원 (한남대학교 공과대학 화학공학과)
임지원 (한남대학교 공과대학 화학공학과)
Publication Information
Membrane Journal / v.12, no.4, 2002 , pp. 255-261 More about this Journal
Abstract
Poly(vinyl alcohol) (PVA) membranes crosslinked with poly(acrylic acid-co-maleic anhydride) (PAM) as a polymeric crosslinking agent were prepared to investigate the pervaporation performance for the dehydration separation of aqueous ethanol solution. The characteristics of the resulting membranes crosslinked(x) were analysed by FT-IR and water swelling test. The water swelling decreased with increasing crosslinking agent content. The crosslinked PVA membranes with PAM showed lower water swelling than those of PVA membrane crosslinked with glutaraldehyde and modified PVA membrane. The swelling of water molecules in the crosslinked PVA membranes is more restricted by both chemical crosslinking between PVA and polymeric crosslinking agent chains and physical crosslinking by the entanglement between the PVA and polymeric crosslinking agent chains. For the pervaporation of aqueous ethanol solution through the crosslinked membrane, as the contents of crosslinking agent increased, the separation factor increased while the permeation flux decreased. The separation factor slightly decreased and permeation flux increased with increasing feed water content. As a result it could be considered that PVA-PAM membranes suppressed the plasticization effect even in the range of high water concentration in fled.
Keywords
Poly(vinyl alcohol); Poly(acrylic acid-co maleic anhydride); Pervaporation; Polymeric closslinking agent; plasticization effect;
Citations & Related Records
Times Cited By KSCI : 7  (Citation Analysis)
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