Pervaporation separation of ethanol/water mixture by UV/O-3-modified PDMS membranes

doi:10.1016/j.seppur.2012.07.018

CNU IR > College of Sustainable Environment and Recreation > Dept. of Environmental Engineering and Science (including master's program) > Periodical Articles > Item 310902800/27545

Please use this identifier to cite or link to this item: https://ir.cnu.edu.tw/handle/310902800/27545

Title:	Pervaporation separation of ethanol/water mixture by UV/O-3-modified PDMS membranes
Authors:	Lai, Cheng-Lee Fu, Ywu-Jang Chen, Jung-Tsai An, Quan-Fu Liao, Kuo-Sung Fang, Shih-Ching Hu, Chien-Chieh Lee, Kueir-Rarn
Contributors:	環境工程與科學系
Keywords:	Uv/Ozone Modification Pdms Membrane Pervaporation
Date:	2012-10-24
Issue Date:	2014-03-21 16:13:02 (UTC+8)
Publisher:	Elsevier Science Bv
Abstract:	A UV/O-3 surface modification technology was used to develop high-performance dense polydimethylsiloxane (PDMS) pervaporation membranes for separating ethanol/water mixtures. Surface characteristics of PDMS membranes were evaluated by attenuated total reflectance - Fourier transform infrared spectroscopy, scanning electron microscopy - energy dispersive X-ray spectroscopy, X-ray photoelectron spectroscopy, and water contact angle measurement. The effect of UV/O-3 treatment time and working distance on the membrane physical and chemical properties and pervaporation performance were investigated. Results indicated that either longer treatment time or shorter working distance resulted in lower water contact angle and higher O/Si ratio, which implied higher conversion of PDMS into hydrophilic silica-like structure. The selectivity was greatly improved with longer treatment time and decreasing working distance. The UV/O-3 modification technique effectively increased the pervaporation performance of PDMS, especially at high temperature conditions of the feed. (c) 2012 Elsevier B.V. All rights reserved.
Relation:	Separation And Purification Technology, 100, 15-21
Appears in Collections:	[Dept. of Environmental Engineering and Science (including master's program)] Periodical Articles

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