A study on high-performance composite membranes comprising heterogeneous polyamide layers on an electrospun substrate for ethanol dehydration

doi:10.1016/j.memsci.2014.07.066

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Title:	A study on high-performance composite membranes comprising heterogeneous polyamide layers on an electrospun substrate for ethanol dehydration
Authors:	Hung, Wei-Song Lai, Cheng-Lee An, Quanfu De Guzman, Manuel Shen, Tai-Jung Huang, Yun-Hsuan Chang, Kuei-Chien Tsou, Chi-Hui Hu, Chien-Chieh Lee, Kueir-Rarn
Contributors:	環境工程與管理系
Keywords:	Heterogeneous polyamide Dynamic interfacial polymerization Electrospinning Positron annihilation lifetime spectroscopy Free volume
Date:	2014-11
Issue Date:	2015-05-06 21:18:18 (UTC+8)
Publisher:	Elsevier Science Bv
Abstract:	We fabricated a novel high-performance pervaporation membrane for ethanol dehydration through interfacial polymerization integrated with spin-coating, a method we called dynamic interfacial polymerization. Varying amine and ac-yl chloride monomers were used to assemble heterogeneous polyamicle layers on an electrospun polyacrylonitrile substrate. The performance of the composite membrane comprising a highly crosslinked top layer surpassed that of the commercial PERVAP 2210 membrane: the permeation flux (13.9 kg/m(2)h) was eight Limes higher and the separation factor (4491) 19 Limes. It also exhibited stability during the peryaporation operation for 20 clays. Positron annihilation lifetime spectroscopy indicated the effect of the layers' free volume on the membrane performance. Doppler broadening energy spectroscopy gave information on interfacial defects. We also investigated the performance of composite membranes with homogeneous layers; despite assembling five homogeneous layers, the permeate concentration reached only up to 93.7 wt% water. (C) 2014 Elsevier B.V. All rights reserved.
Relation:	Journal of Membrane Science, v.470, pp.513-523
Appears in Collections:	[Dept. of Environmental Engineering and Science (including master's program)] Periodical Articles

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