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    Title: Formation of multilayer poly(acrylic acid)/poly(vinylidene fluoride) composite membranes for pervaporation
    Authors: Lin, Dar-Jong;Chang, Cheng-liang;Shaw, Horng-yue;Jeng, Yi-su;Cheng, Liao-ping
    Contributors: 淡江大學化學工程與材料工程學系
    Keywords: Membranes;Plasma polymerization;Poly(vinylidene fluoride) (PVDF);Pervaporation;Separation of polymers
    Date: 200409
    Issue Date: 2011-05-20 09:55:55 (UTC+8)
    Publisher: Wiley
    Abstract: Dual- and multilayer composite membranes, consisting of poly(acrylic acid) (PAA) and poly(vinylidene fluoride) (PVDF), were synthesized by the plasma-induced polymerization technique. The dual-layer membrane had a dense PAA layer grafted onto a microporous PVDF substrate, whereas in the multilayer membranes, the grafted PAA and the PVDF layers were arranged in an alternating sequence (e.g., PAA/PVDF/PAA and PAA/PVDF/PAA/PVDF/PAA). These membranes were used in a pervaporation process to separate ethanol–water solutions. For the dual-layer membranes, the results indicated that the separation factor increased and the permeation flux decreased with increasing amounts of grafted PAA. For the case of grafting yield < 0.6 mg/cm2, the composite membrane demonstrated poor separation. As the grafting yield reached 0.85 mg/cm2, a sharp increase of the separation factor was observed. For the multilayer membranes, the pervaporation performances were very good, with high separation factors (on the order of 100) and reasonable permeation fluxes over a wide ethanol concentration range.
    Relation: Journal of Applied Polymer Science 93(5), pp.2266-2274
    DOI: 10.1002/app.20775
    Appears in Collections:[化學工程與材料工程學系暨研究所] 期刊論文

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