Ultraviolet-ray treatment of polysulfone membranes on the O<inf>2</inf>/N<inf>2</inf> and CO<inf>2</inf>/CH<inf>4</inf> separation performance

© 2015 Wiley Periodicals, Inc. UV irradiation on polysulfone (PSF) membranes was studied to improve their gas-separation properties. Membranes with 19-25% PSF contents were prepared by the phase-inversion method, and the membrane surface was modified with UV rays with a wavelength of 312 nm and a po...

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Main Authors: Sutthisa Konruang, Suksawat Sirijarukul, Pikul Wanichapichart, Liangdeng Yu, Thawat Chittrakarn
Format: Journal
Published: 2018
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http://cmuir.cmu.ac.th/jspui/handle/6653943832/54300
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spelling th-cmuir.6653943832-543002018-09-04T10:18:28Z Ultraviolet-ray treatment of polysulfone membranes on the O&lt;inf&gt;2&lt;/inf&gt;/N&lt;inf&gt;2&lt;/inf&gt; and CO&lt;inf&gt;2&lt;/inf&gt;/CH&lt;inf&gt;4&lt;/inf&gt; separation performance Sutthisa Konruang Suksawat Sirijarukul Pikul Wanichapichart Liangdeng Yu Thawat Chittrakarn Chemistry Materials Science © 2015 Wiley Periodicals, Inc. UV irradiation on polysulfone (PSF) membranes was studied to improve their gas-separation properties. Membranes with 19-25% PSF contents were prepared by the phase-inversion method, and the membrane surface was modified with UV rays with a wavelength of 312 nm and a power of 360 μw/cm<sup>2</sup>. Measurements of gas permeation were conducted with pure carbon dioxide (CO<inf>2</inf>), methane (CH<inf>4</inf>), oxygen (O<inf>2</inf>), and nitrogen (N<inf>2</inf>) gases under 3-8 bar pressure at 25°C. Fourier transform infrared spectrometry revealed that the polar functional groups of hydroxyl and carbonyl were introduced by UV irradiation. The water contact angle of the treated membrane was reduced from 70-75° to 10-12° after 12 h of UV exposure. Scanning electron microscopy observation showed that the dense skin layer increased as the polymer concentration increased. After UV treatment, the permeation of O<inf>2</inf> decreased from 0.4-3.4 to 0.2-2.3 m<sup>3</sup> m<sup>-2</sup> h<sup>-1</sup> bar<sup>-1</sup>, whereas that of N<inf>2</inf>, CO<inf>2</inf>, and CH<inf>4</inf> increased for all of the pressures used from 0.1-1.7 m<sup>3</sup> m<sup>-2</sup> h<sup>-1</sup> bar<sup>-1</sup> to about 0.1-3.4 m<sup>3</sup> m<sup>-2</sup> h<sup>-1</sup> bar<sup>-1</sup>; this depended on the applied pressure and the PSF content. As a result, the selectivity ratio of O<inf>2</inf>/N<inf>2</inf> decreased from 1.9-7.8 to 0.6-1.5, whereas that of CO<inf>2</inf>/CH<inf>4</inf> increased from 0.9-2.6 to 1.1-6.1. Moreover, the O<inf>2</inf>/N<inf>2</inf> and CO<inf>2</inf>/CH<inf>4</inf> of the untreated and the treated membranes decreased with increasing pressure and increased with increasing polymer concentration. 2018-09-04T10:11:20Z 2018-09-04T10:11:20Z 2015-01-01 Journal 10974628 00218995 2-s2.0-84927145194 10.1002/app.42074 https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84927145194&origin=inward http://cmuir.cmu.ac.th/jspui/handle/6653943832/54300
institution Chiang Mai University
building Chiang Mai University Library
country Thailand
collection CMU Intellectual Repository
topic Chemistry
Materials Science
spellingShingle Chemistry
Materials Science
Sutthisa Konruang
Suksawat Sirijarukul
Pikul Wanichapichart
Liangdeng Yu
Thawat Chittrakarn
Ultraviolet-ray treatment of polysulfone membranes on the O&lt;inf&gt;2&lt;/inf&gt;/N&lt;inf&gt;2&lt;/inf&gt; and CO&lt;inf&gt;2&lt;/inf&gt;/CH&lt;inf&gt;4&lt;/inf&gt; separation performance
description © 2015 Wiley Periodicals, Inc. UV irradiation on polysulfone (PSF) membranes was studied to improve their gas-separation properties. Membranes with 19-25% PSF contents were prepared by the phase-inversion method, and the membrane surface was modified with UV rays with a wavelength of 312 nm and a power of 360 μw/cm<sup>2</sup>. Measurements of gas permeation were conducted with pure carbon dioxide (CO<inf>2</inf>), methane (CH<inf>4</inf>), oxygen (O<inf>2</inf>), and nitrogen (N<inf>2</inf>) gases under 3-8 bar pressure at 25°C. Fourier transform infrared spectrometry revealed that the polar functional groups of hydroxyl and carbonyl were introduced by UV irradiation. The water contact angle of the treated membrane was reduced from 70-75° to 10-12° after 12 h of UV exposure. Scanning electron microscopy observation showed that the dense skin layer increased as the polymer concentration increased. After UV treatment, the permeation of O<inf>2</inf> decreased from 0.4-3.4 to 0.2-2.3 m<sup>3</sup> m<sup>-2</sup> h<sup>-1</sup> bar<sup>-1</sup>, whereas that of N<inf>2</inf>, CO<inf>2</inf>, and CH<inf>4</inf> increased for all of the pressures used from 0.1-1.7 m<sup>3</sup> m<sup>-2</sup> h<sup>-1</sup> bar<sup>-1</sup> to about 0.1-3.4 m<sup>3</sup> m<sup>-2</sup> h<sup>-1</sup> bar<sup>-1</sup>; this depended on the applied pressure and the PSF content. As a result, the selectivity ratio of O<inf>2</inf>/N<inf>2</inf> decreased from 1.9-7.8 to 0.6-1.5, whereas that of CO<inf>2</inf>/CH<inf>4</inf> increased from 0.9-2.6 to 1.1-6.1. Moreover, the O<inf>2</inf>/N<inf>2</inf> and CO<inf>2</inf>/CH<inf>4</inf> of the untreated and the treated membranes decreased with increasing pressure and increased with increasing polymer concentration.
format Journal
author Sutthisa Konruang
Suksawat Sirijarukul
Pikul Wanichapichart
Liangdeng Yu
Thawat Chittrakarn
author_facet Sutthisa Konruang
Suksawat Sirijarukul
Pikul Wanichapichart
Liangdeng Yu
Thawat Chittrakarn
author_sort Sutthisa Konruang
title Ultraviolet-ray treatment of polysulfone membranes on the O&lt;inf&gt;2&lt;/inf&gt;/N&lt;inf&gt;2&lt;/inf&gt; and CO&lt;inf&gt;2&lt;/inf&gt;/CH&lt;inf&gt;4&lt;/inf&gt; separation performance
title_short Ultraviolet-ray treatment of polysulfone membranes on the O&lt;inf&gt;2&lt;/inf&gt;/N&lt;inf&gt;2&lt;/inf&gt; and CO&lt;inf&gt;2&lt;/inf&gt;/CH&lt;inf&gt;4&lt;/inf&gt; separation performance
title_full Ultraviolet-ray treatment of polysulfone membranes on the O&lt;inf&gt;2&lt;/inf&gt;/N&lt;inf&gt;2&lt;/inf&gt; and CO&lt;inf&gt;2&lt;/inf&gt;/CH&lt;inf&gt;4&lt;/inf&gt; separation performance
title_fullStr Ultraviolet-ray treatment of polysulfone membranes on the O&lt;inf&gt;2&lt;/inf&gt;/N&lt;inf&gt;2&lt;/inf&gt; and CO&lt;inf&gt;2&lt;/inf&gt;/CH&lt;inf&gt;4&lt;/inf&gt; separation performance
title_full_unstemmed Ultraviolet-ray treatment of polysulfone membranes on the O&lt;inf&gt;2&lt;/inf&gt;/N&lt;inf&gt;2&lt;/inf&gt; and CO&lt;inf&gt;2&lt;/inf&gt;/CH&lt;inf&gt;4&lt;/inf&gt; separation performance
title_sort ultraviolet-ray treatment of polysulfone membranes on the o&lt;inf&gt;2&lt;/inf&gt;/n&lt;inf&gt;2&lt;/inf&gt; and co&lt;inf&gt;2&lt;/inf&gt;/ch&lt;inf&gt;4&lt;/inf&gt; separation performance
publishDate 2018
url https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84927145194&origin=inward
http://cmuir.cmu.ac.th/jspui/handle/6653943832/54300
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