Surface modification of PVDF hollow fiber membrane to enhance hydrophobicity using organosilanes

This work investigates the membrane modification to enhance hydrophobicity aiming for applications as membrane contactors. The PVDF membranes were activated by NaOH and by plasma activation followed by grafting using three organosilanes. For the NaOH, the contact angle of original membranes (68°) wa...

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Main Authors: Sairiam, Sermpong, Loh, Chun Heng, Wang, Rong, Jiraratananon, Ratana
Other Authors: School of Civil and Environmental Engineering
Format: Article
Language:English
Published: 2014
Subjects:
Online Access:https://hdl.handle.net/10356/102824
http://hdl.handle.net/10220/19120
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1028242020-03-07T11:45:55Z Surface modification of PVDF hollow fiber membrane to enhance hydrophobicity using organosilanes Sairiam, Sermpong Loh, Chun Heng Wang, Rong Jiraratananon, Ratana School of Civil and Environmental Engineering DRNTU::Engineering::Materials This work investigates the membrane modification to enhance hydrophobicity aiming for applications as membrane contactors. The PVDF membranes were activated by NaOH and by plasma activation followed by grafting using three organosilanes. For the NaOH, the contact angle of original membranes (68°) was decreased from 44° to 31° with increasing NaOH concentration from 2.5M to 7.5M at 60°C for 3 h. The contact angle of NaOH treated membranes was increased to 100° after modification with 0.01M FAS-C8 for 24 h. A needle-like structure was observed on the membrane surface while there was no significant change in pore size and pore size distribution. Moreover, FTIR and XPS data showed Si peak and composition. The mechanical strength was improved. The surface modified membranes under helium plasma activation followed by grafting with 0.01M FAS-C8 for 24 h showed higher contact angle, mechanical strength and surface roughness than that obtained by NaOH activation method while other physical properties did not change. The long-term performance test for 15 days of operation was conducted. The modified membranes exhibited good stability and durability for CO2 absorption. 2014-04-04T07:23:15Z 2019-12-06T21:00:46Z 2014-04-04T07:23:15Z 2019-12-06T21:00:46Z 2013 2013 Journal Article Sairiam, S., Loh, C. H., Wang, R., & Jiraratananon, R. (2013). Surface modification of PVDF hollow fiber membrane to enhance hydrophobicity using organosilanes. Journal of Applied Polymer Science, 130(1), 610-621. 0021-8995 https://hdl.handle.net/10356/102824 http://hdl.handle.net/10220/19120 10.1002/app.39197 en Journal of applied polymer science © 2013 Wiley Periodicals, Inc.
institution Nanyang Technological University
building NTU Library
country Singapore
collection DR-NTU
language English
topic DRNTU::Engineering::Materials
spellingShingle DRNTU::Engineering::Materials
Sairiam, Sermpong
Loh, Chun Heng
Wang, Rong
Jiraratananon, Ratana
Surface modification of PVDF hollow fiber membrane to enhance hydrophobicity using organosilanes
description This work investigates the membrane modification to enhance hydrophobicity aiming for applications as membrane contactors. The PVDF membranes were activated by NaOH and by plasma activation followed by grafting using three organosilanes. For the NaOH, the contact angle of original membranes (68°) was decreased from 44° to 31° with increasing NaOH concentration from 2.5M to 7.5M at 60°C for 3 h. The contact angle of NaOH treated membranes was increased to 100° after modification with 0.01M FAS-C8 for 24 h. A needle-like structure was observed on the membrane surface while there was no significant change in pore size and pore size distribution. Moreover, FTIR and XPS data showed Si peak and composition. The mechanical strength was improved. The surface modified membranes under helium plasma activation followed by grafting with 0.01M FAS-C8 for 24 h showed higher contact angle, mechanical strength and surface roughness than that obtained by NaOH activation method while other physical properties did not change. The long-term performance test for 15 days of operation was conducted. The modified membranes exhibited good stability and durability for CO2 absorption.
author2 School of Civil and Environmental Engineering
author_facet School of Civil and Environmental Engineering
Sairiam, Sermpong
Loh, Chun Heng
Wang, Rong
Jiraratananon, Ratana
format Article
author Sairiam, Sermpong
Loh, Chun Heng
Wang, Rong
Jiraratananon, Ratana
author_sort Sairiam, Sermpong
title Surface modification of PVDF hollow fiber membrane to enhance hydrophobicity using organosilanes
title_short Surface modification of PVDF hollow fiber membrane to enhance hydrophobicity using organosilanes
title_full Surface modification of PVDF hollow fiber membrane to enhance hydrophobicity using organosilanes
title_fullStr Surface modification of PVDF hollow fiber membrane to enhance hydrophobicity using organosilanes
title_full_unstemmed Surface modification of PVDF hollow fiber membrane to enhance hydrophobicity using organosilanes
title_sort surface modification of pvdf hollow fiber membrane to enhance hydrophobicity using organosilanes
publishDate 2014
url https://hdl.handle.net/10356/102824
http://hdl.handle.net/10220/19120
_version_ 1681039269191221248