Polysulfone/graphene oxide mixed matrix hollow fiber membrance for carbon dioxide removal

The multiple benefits of membrane technology have promised the feasible application in large scale for carbon dioxide (CO2) removal. Mixed matrix membrane (MMM) is an organic polymeric phase that is dispersed with inorganic fillers. MMM has become a promising type of membrane for CO2 removal as it c...

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Main Author:	Zahri, Khalisah
Format:	Thesis
Language:	English
Published:	2019
Subjects:	TP Chemical technology
Online Access:	http://eprints.utm.my/id/eprint/85893/1/KhalisahZahriMSChE2019.pdf
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spelling	my-utm-ep.858932020-07-30T07:38:20Z Polysulfone/graphene oxide mixed matrix hollow fiber membrance for carbon dioxide removal 2019 Zahri, Khalisah TP Chemical technology The multiple benefits of membrane technology have promised the feasible application in large scale for carbon dioxide (CO2) removal. Mixed matrix membrane (MMM) is an organic polymeric phase that is dispersed with inorganic fillers. MMM has become a promising type of membrane for CO2 removal as it combines high processability of polymeric materials with superior gas separation properties of inorganic materials. In this study, an asymmetric mixed matrix hollow fiber membrane (MMHFM) was prepared by incorporating graphene oxide (GO) into polysulfone (PSf) polymer matrix for CO2 removal. Graphite was used as a filler precursor and was subjected to surface modification by oxidation process to produce graphene oxide (GO). Different loading of as-synthesized GO in the range between 0.05 to 1.0 wt.% was physically mixed with PSf polymer for dope preparation. The asymmetric MMHFM were spun via dry-wet technique. The transmission electron microscopy and atomic force microscopy analysis have confirmed that the synthesized GO was in the nanosheets form structure. The addition of GO was found to change the formation of MMHFM substructure layer as well as the thickness of MMHFM dense selective layer. The active functional groups of GO have facilitated the uniform filler dispersion within the PSf polymer matrix. GO loading of 0.25 wt.% was found to be the optimum loading to enhance the overall membrane properties and gas separation performance with CO2 permeance of 74.47 GPU. Both CO2/N2 and CO2/CH4 selectivity of MMHFM were enhanced by 310% and 211%, respectively, as compared to that of the neat PSf membrane. The well dispersed GO improves the CO2 separation by fully utilized its p-p conjugated bond and creates a path for small molecule gas (CO2) by restricting larger molecule gases (N2 and CH4) to pass through the membrane. However, the excessive of GO loading with more than 0.25 wt.% would lead to agglomeration and restacking problem, and this condition could deteriorate the MMHFM gas separation properties. 2019 Thesis http://eprints.utm.my/id/eprint/85893/ http://eprints.utm.my/id/eprint/85893/1/KhalisahZahriMSChE2019.pdf application/pdf en public http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:131976 masters Universiti Teknologi Malaysia, Faculty of Engineering - School of Chemical & Energy Engineering Faculty of Engineering - School of Chemical & Energy Engineering
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
language	English
topic	TP Chemical technology
spellingShingle	TP Chemical technology Zahri, Khalisah Polysulfone/graphene oxide mixed matrix hollow fiber membrance for carbon dioxide removal
description	The multiple benefits of membrane technology have promised the feasible application in large scale for carbon dioxide (CO2) removal. Mixed matrix membrane (MMM) is an organic polymeric phase that is dispersed with inorganic fillers. MMM has become a promising type of membrane for CO2 removal as it combines high processability of polymeric materials with superior gas separation properties of inorganic materials. In this study, an asymmetric mixed matrix hollow fiber membrane (MMHFM) was prepared by incorporating graphene oxide (GO) into polysulfone (PSf) polymer matrix for CO2 removal. Graphite was used as a filler precursor and was subjected to surface modification by oxidation process to produce graphene oxide (GO). Different loading of as-synthesized GO in the range between 0.05 to 1.0 wt.% was physically mixed with PSf polymer for dope preparation. The asymmetric MMHFM were spun via dry-wet technique. The transmission electron microscopy and atomic force microscopy analysis have confirmed that the synthesized GO was in the nanosheets form structure. The addition of GO was found to change the formation of MMHFM substructure layer as well as the thickness of MMHFM dense selective layer. The active functional groups of GO have facilitated the uniform filler dispersion within the PSf polymer matrix. GO loading of 0.25 wt.% was found to be the optimum loading to enhance the overall membrane properties and gas separation performance with CO2 permeance of 74.47 GPU. Both CO2/N2 and CO2/CH4 selectivity of MMHFM were enhanced by 310% and 211%, respectively, as compared to that of the neat PSf membrane. The well dispersed GO improves the CO2 separation by fully utilized its p-p conjugated bond and creates a path for small molecule gas (CO2) by restricting larger molecule gases (N2 and CH4) to pass through the membrane. However, the excessive of GO loading with more than 0.25 wt.% would lead to agglomeration and restacking problem, and this condition could deteriorate the MMHFM gas separation properties.
format	Thesis
qualification_level	Master's degree
author	Zahri, Khalisah
author_facet	Zahri, Khalisah
author_sort	Zahri, Khalisah
title	Polysulfone/graphene oxide mixed matrix hollow fiber membrance for carbon dioxide removal
title_short	Polysulfone/graphene oxide mixed matrix hollow fiber membrance for carbon dioxide removal
title_full	Polysulfone/graphene oxide mixed matrix hollow fiber membrance for carbon dioxide removal
title_fullStr	Polysulfone/graphene oxide mixed matrix hollow fiber membrance for carbon dioxide removal
title_full_unstemmed	Polysulfone/graphene oxide mixed matrix hollow fiber membrance for carbon dioxide removal
title_sort	polysulfone/graphene oxide mixed matrix hollow fiber membrance for carbon dioxide removal
granting_institution	Universiti Teknologi Malaysia, Faculty of Engineering - School of Chemical & Energy Engineering
granting_department	Faculty of Engineering - School of Chemical & Energy Engineering
publishDate	2019
url	http://eprints.utm.my/id/eprint/85893/1/KhalisahZahriMSChE2019.pdf
_version_	1747818470162038784

Polysulfone/graphene oxide mixed matrix hollow fiber membrance for carbon dioxide removal

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