Development and characterization of sulfonated polysulfone membrane for proton exchange membrane fuel cell (PEMFC)

Sulfonated polysulfone membranes with varying degree of sulfonation have been successfully synthesized by electrophilic substitution via sulfonation process in this study. Sulfonated dense membranes were fabricated using locally available pneumatically controlled casting machine. Characterizations o...

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Main Author:	Naim, Rosmawati
Format:	Thesis
Language:	English
Published:	2004
Subjects:	TP Chemical technology
Online Access:	http://eprints.utm.my/id/eprint/6132/1/RosmawatiNaimMFKT2004.pdf
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spelling	my-utm-ep.61322018-09-19T05:03:21Z Development and characterization of sulfonated polysulfone membrane for proton exchange membrane fuel cell (PEMFC) 2004-07 Naim, Rosmawati TP Chemical technology Sulfonated polysulfone membranes with varying degree of sulfonation have been successfully synthesized by electrophilic substitution via sulfonation process in this study. Sulfonated dense membranes were fabricated using locally available pneumatically controlled casting machine. Characterizations of different degree of sulfonated polysulfone membranes were conducted through swelling effects, ion exchange capacity (IEC), Thermal Gravimetric Analysis (TGA), Differential Scanning Calorimeter (DSC), X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM) and proton conductivity measurement. It was observed that an increase in the degree of sulfonation increases the water uptake of the membranes and sulfonic acid group in the polymer membrane. From FTIR, it was clearly confirmed the occurrence of sulfonation in the polymer structure as the evidence of the SO3 stretching band was noticed at frequency of 1027 cm-1. It was found from TGA that the sulfonic acid group started to decompose at 250ÂºC and decomposition of the polymer main chain decreases by increasing the degree of sulfonation. The Tg value detected in this study was increased accordingly with the degree of sulfonation though some hindrance was found to decrease the Tg value during the experiments. Proton conductivity measurement of sulfonated polysulfone membrane was found to increase with operating temperature and degree of sulfonation. It was found that at higher temperature (80ÂºC), SPSU10 membrane exhibits proton conductivity value at par with that of Nafion 117 membrane. It was also observed from XRD analysis that dimethylformamide solvent was prone to form hydrogen bonding with sulfonic groups hence allows formation of a more regular structure which leads to an incipient crystalline character of the material structure. SEM micrographs showed clearly the altered microstructure of polysulfone polymer before and after the sulfonation process. 2004-07 Thesis http://eprints.utm.my/id/eprint/6132/ http://eprints.utm.my/id/eprint/6132/1/RosmawatiNaimMFKT2004.pdf application/pdf en public http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:61993 masters Universiti Teknologi Malaysia, Faculty of Chemical and Natural Resources Engineering Faculty of Chemical and Natural Resources Engineering
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
language	English
topic	TP Chemical technology
spellingShingle	TP Chemical technology Naim, Rosmawati Development and characterization of sulfonated polysulfone membrane for proton exchange membrane fuel cell (PEMFC)
description	Sulfonated polysulfone membranes with varying degree of sulfonation have been successfully synthesized by electrophilic substitution via sulfonation process in this study. Sulfonated dense membranes were fabricated using locally available pneumatically controlled casting machine. Characterizations of different degree of sulfonated polysulfone membranes were conducted through swelling effects, ion exchange capacity (IEC), Thermal Gravimetric Analysis (TGA), Differential Scanning Calorimeter (DSC), X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM) and proton conductivity measurement. It was observed that an increase in the degree of sulfonation increases the water uptake of the membranes and sulfonic acid group in the polymer membrane. From FTIR, it was clearly confirmed the occurrence of sulfonation in the polymer structure as the evidence of the SO3 stretching band was noticed at frequency of 1027 cm-1. It was found from TGA that the sulfonic acid group started to decompose at 250ÂºC and decomposition of the polymer main chain decreases by increasing the degree of sulfonation. The Tg value detected in this study was increased accordingly with the degree of sulfonation though some hindrance was found to decrease the Tg value during the experiments. Proton conductivity measurement of sulfonated polysulfone membrane was found to increase with operating temperature and degree of sulfonation. It was found that at higher temperature (80ÂºC), SPSU10 membrane exhibits proton conductivity value at par with that of Nafion 117 membrane. It was also observed from XRD analysis that dimethylformamide solvent was prone to form hydrogen bonding with sulfonic groups hence allows formation of a more regular structure which leads to an incipient crystalline character of the material structure. SEM micrographs showed clearly the altered microstructure of polysulfone polymer before and after the sulfonation process.
format	Thesis
qualification_level	Master's degree
author	Naim, Rosmawati
author_facet	Naim, Rosmawati
author_sort	Naim, Rosmawati
title	Development and characterization of sulfonated polysulfone membrane for proton exchange membrane fuel cell (PEMFC)
title_short	Development and characterization of sulfonated polysulfone membrane for proton exchange membrane fuel cell (PEMFC)
title_full	Development and characterization of sulfonated polysulfone membrane for proton exchange membrane fuel cell (PEMFC)
title_fullStr	Development and characterization of sulfonated polysulfone membrane for proton exchange membrane fuel cell (PEMFC)
title_full_unstemmed	Development and characterization of sulfonated polysulfone membrane for proton exchange membrane fuel cell (PEMFC)
title_sort	development and characterization of sulfonated polysulfone membrane for proton exchange membrane fuel cell (pemfc)
granting_institution	Universiti Teknologi Malaysia, Faculty of Chemical and Natural Resources Engineering
granting_department	Faculty of Chemical and Natural Resources Engineering
publishDate	2004
url	http://eprints.utm.my/id/eprint/6132/1/RosmawatiNaimMFKT2004.pdf
_version_	1747814633645801472

Development and characterization of sulfonated polysulfone membrane for proton exchange membrane fuel cell (PEMFC)

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