Novel single-step hydrophobic modification of polymeric hollow fiber membranes containing imide groups : its potential for membrane contactor application

Highly hydrophobic surface property of membranes is very important for membrane contactor application that is normally used for CO2 capture. This study explores a simple and inexpensive approach for hydrophobic modification of imide group contained polymeric membranes. Poly(amide–imide) (PAI) hollow...

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Main Authors: Zhang, Yuan, Wang, Rong, Zhang, Lizhi, Fane, Anthony Gordon
Other Authors: School of Civil and Environmental Engineering
Format: Article
Language:English
Published: 2013
Online Access:https://hdl.handle.net/10356/97047
http://hdl.handle.net/10220/10398
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-970472020-03-07T11:43:43Z Novel single-step hydrophobic modification of polymeric hollow fiber membranes containing imide groups : its potential for membrane contactor application Zhang, Yuan Wang, Rong Zhang, Lizhi Fane, Anthony Gordon School of Civil and Environmental Engineering Singapore Membrane Technology Centre Highly hydrophobic surface property of membranes is very important for membrane contactor application that is normally used for CO2 capture. This study explores a simple and inexpensive approach for hydrophobic modification of imide group contained polymeric membranes. Poly(amide–imide) (PAI) hollow fiber membrane with controlled pore structure as porous substrate was fabricated by dry-jet wet spinning process, followed by a wet-chemical hydrophobic modification using octadecylamine. The modification mechanism was confirmed by ATR-FTIR, and the effect of different modification times on the modified membrane properties was investigated. Experiments reveal that the modification changed the membrane morphology and structure, resulted in surface pore opening and thinning down of the membrane skin layer. As a compromise between the membrane hydrophobicity and mechanical strength, 10–30 min were considered as appropriate modification times for the PAI membranes. The treated membranes showed much higher hydrophobicity with an improvement in contact angle of around 30°. The liquid entry pressure (LEPw) also increased dramatically from 7 psi to 63 psi after 30 min modification due to the enhanced membrane hydrophobicity. The treated membranes were tested in the membrane contactor for CO2 absorption. It was observed the CO2 flux increased with the liquid velocity and modification time. A stable long-term performance of CO2 absorption by a 2 M sodium taurinate aqueous solution for 15 days of operation was attained. Moreover, poly(etherimide) (PEI) hollow fiber membranes were successfully modified by octadecylamine, which demonstrated the effectiveness and versatility of the modification method on imide-contained polymeric membranes. 2013-06-14T03:47:10Z 2019-12-06T19:38:13Z 2013-06-14T03:47:10Z 2019-12-06T19:38:13Z 2012 2012 Journal Article Zhang, Y., Wang, R., Zhang, L., & Fane, A. G. (2012). Novel single-step hydrophobic modification of polymeric hollow fiber membranes containing imide groups: Its potential for membrane contactor application. Separation and Purification Technology, 101, 76-84. 1383-5866 https://hdl.handle.net/10356/97047 http://hdl.handle.net/10220/10398 10.1016/j.seppur.2012.09.009 en Separation and purification technology © 2012 Elsevier B.V.
institution Nanyang Technological University
building NTU Library
country Singapore
collection DR-NTU
language English
description Highly hydrophobic surface property of membranes is very important for membrane contactor application that is normally used for CO2 capture. This study explores a simple and inexpensive approach for hydrophobic modification of imide group contained polymeric membranes. Poly(amide–imide) (PAI) hollow fiber membrane with controlled pore structure as porous substrate was fabricated by dry-jet wet spinning process, followed by a wet-chemical hydrophobic modification using octadecylamine. The modification mechanism was confirmed by ATR-FTIR, and the effect of different modification times on the modified membrane properties was investigated. Experiments reveal that the modification changed the membrane morphology and structure, resulted in surface pore opening and thinning down of the membrane skin layer. As a compromise between the membrane hydrophobicity and mechanical strength, 10–30 min were considered as appropriate modification times for the PAI membranes. The treated membranes showed much higher hydrophobicity with an improvement in contact angle of around 30°. The liquid entry pressure (LEPw) also increased dramatically from 7 psi to 63 psi after 30 min modification due to the enhanced membrane hydrophobicity. The treated membranes were tested in the membrane contactor for CO2 absorption. It was observed the CO2 flux increased with the liquid velocity and modification time. A stable long-term performance of CO2 absorption by a 2 M sodium taurinate aqueous solution for 15 days of operation was attained. Moreover, poly(etherimide) (PEI) hollow fiber membranes were successfully modified by octadecylamine, which demonstrated the effectiveness and versatility of the modification method on imide-contained polymeric membranes.
author2 School of Civil and Environmental Engineering
author_facet School of Civil and Environmental Engineering
Zhang, Yuan
Wang, Rong
Zhang, Lizhi
Fane, Anthony Gordon
format Article
author Zhang, Yuan
Wang, Rong
Zhang, Lizhi
Fane, Anthony Gordon
spellingShingle Zhang, Yuan
Wang, Rong
Zhang, Lizhi
Fane, Anthony Gordon
Novel single-step hydrophobic modification of polymeric hollow fiber membranes containing imide groups : its potential for membrane contactor application
author_sort Zhang, Yuan
title Novel single-step hydrophobic modification of polymeric hollow fiber membranes containing imide groups : its potential for membrane contactor application
title_short Novel single-step hydrophobic modification of polymeric hollow fiber membranes containing imide groups : its potential for membrane contactor application
title_full Novel single-step hydrophobic modification of polymeric hollow fiber membranes containing imide groups : its potential for membrane contactor application
title_fullStr Novel single-step hydrophobic modification of polymeric hollow fiber membranes containing imide groups : its potential for membrane contactor application
title_full_unstemmed Novel single-step hydrophobic modification of polymeric hollow fiber membranes containing imide groups : its potential for membrane contactor application
title_sort novel single-step hydrophobic modification of polymeric hollow fiber membranes containing imide groups : its potential for membrane contactor application
publishDate 2013
url https://hdl.handle.net/10356/97047
http://hdl.handle.net/10220/10398
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