Synthesis, characterization and optimization of sulfonated polyether ether ketone composite membrane for direct methanol fuel cell

The high costs of perfluorinated membranes have prompted research for alternative membranes based on hydrocarbon polymer and composite membrane. New composite membranes were prepared using sulfonated polyether ether ketone (SPEEK) polymer and inorganic proton conducting fillers developed from tungst...

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Main Author:	Othman, Nur Hidayati
Format:	Thesis
Language:	English
Published:	2009
Subjects:	TP Chemical technology
Online Access:	http://eprints.utm.my/id/eprint/12029/1/NurhidayatiOthmanKPFKKKSA2009.pdf
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spelling	my-utm-ep.120292018-06-04T09:53:49Z Synthesis, characterization and optimization of sulfonated polyether ether ketone composite membrane for direct methanol fuel cell 2009-10 Othman, Nur Hidayati TP Chemical technology The high costs of perfluorinated membranes have prompted research for alternative membranes based on hydrocarbon polymer and composite membrane. New composite membranes were prepared using sulfonated polyether ether ketone (SPEEK) polymer and inorganic proton conducting fillers developed from tungstosilicic acids (SiWA) loaded on silica-aluminium oxide (SiO2-Al2O3) composite. The SiWA was fixed on stable structure (composite oxide) so that it became insoluble in water. The SPEEK polymers were characterized using hydrogen nuclear magnetic resonance (H NMR) and fourier transformed infrared (FTIR). An X-ray diffraction (XRD) analysis was performed on the inorganic proton conducing fillers to reveal the existence of the interaction between SiWA and composite oxide. The membranes morphological structural were characterized using scanning electron microscope (SEM) and their performance were examined in terms of proton conductivity, water uptake and methanol permeability. The result showed that the presence of inorganic proton conducting fillers led to both high water uptake and proton conductivity (maximum value 6.1x10-2 Scm-1). Low methanol permeability values were recorded for the membranes which appeared as a very promising material to be used in direct methanol fuel cell (DMFC). In order to obtain the optimum membrane formulations that have optimum response, which are minimum water uptake, maximum proton conductivity and minimum methanol permeability; a central composite experimental design (CCD) combined with response surface methodology (RSM) was carried out. The factors considered were SiWA content (A) and SiO2 content in SiO2-Al2O3 (B) composite. The data collected were analyzed using Design Expert Version 6.0.8 (StatEase, USA). Two optimum membrane formulation generated were DS66/68.27SIWA/25SO/75AO and DS66/30SIWA/53.86SO/46.14AO. By performing the validation experiments, the models which were developed using CCD-RSM method appeared to be practically accurate and can be used for prediction within the range of the factors studied. 2009-10 Thesis http://eprints.utm.my/id/eprint/12029/ http://eprints.utm.my/id/eprint/12029/1/NurhidayatiOthmanKPFKKKSA2009.pdf application/pdf en public http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:70034?site_name=Restricted Repository 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 Othman, Nur Hidayati Synthesis, characterization and optimization of sulfonated polyether ether ketone composite membrane for direct methanol fuel cell
description	The high costs of perfluorinated membranes have prompted research for alternative membranes based on hydrocarbon polymer and composite membrane. New composite membranes were prepared using sulfonated polyether ether ketone (SPEEK) polymer and inorganic proton conducting fillers developed from tungstosilicic acids (SiWA) loaded on silica-aluminium oxide (SiO2-Al2O3) composite. The SiWA was fixed on stable structure (composite oxide) so that it became insoluble in water. The SPEEK polymers were characterized using hydrogen nuclear magnetic resonance (H NMR) and fourier transformed infrared (FTIR). An X-ray diffraction (XRD) analysis was performed on the inorganic proton conducing fillers to reveal the existence of the interaction between SiWA and composite oxide. The membranes morphological structural were characterized using scanning electron microscope (SEM) and their performance were examined in terms of proton conductivity, water uptake and methanol permeability. The result showed that the presence of inorganic proton conducting fillers led to both high water uptake and proton conductivity (maximum value 6.1x10-2 Scm-1). Low methanol permeability values were recorded for the membranes which appeared as a very promising material to be used in direct methanol fuel cell (DMFC). In order to obtain the optimum membrane formulations that have optimum response, which are minimum water uptake, maximum proton conductivity and minimum methanol permeability; a central composite experimental design (CCD) combined with response surface methodology (RSM) was carried out. The factors considered were SiWA content (A) and SiO2 content in SiO2-Al2O3 (B) composite. The data collected were analyzed using Design Expert Version 6.0.8 (StatEase, USA). Two optimum membrane formulation generated were DS66/68.27SIWA/25SO/75AO and DS66/30SIWA/53.86SO/46.14AO. By performing the validation experiments, the models which were developed using CCD-RSM method appeared to be practically accurate and can be used for prediction within the range of the factors studied.
format	Thesis
qualification_level	Master's degree
author	Othman, Nur Hidayati
author_facet	Othman, Nur Hidayati
author_sort	Othman, Nur Hidayati
title	Synthesis, characterization and optimization of sulfonated polyether ether ketone composite membrane for direct methanol fuel cell
title_short	Synthesis, characterization and optimization of sulfonated polyether ether ketone composite membrane for direct methanol fuel cell
title_full	Synthesis, characterization and optimization of sulfonated polyether ether ketone composite membrane for direct methanol fuel cell
title_fullStr	Synthesis, characterization and optimization of sulfonated polyether ether ketone composite membrane for direct methanol fuel cell
title_full_unstemmed	Synthesis, characterization and optimization of sulfonated polyether ether ketone composite membrane for direct methanol fuel cell
title_sort	synthesis, characterization and optimization of sulfonated polyether ether ketone composite membrane for direct methanol fuel cell
granting_institution	Universiti Teknologi Malaysia, Faculty of Chemical and Natural Resources Engineering
granting_department	Faculty of Chemical and Natural Resources Engineering
publishDate	2009
url	http://eprints.utm.my/id/eprint/12029/1/NurhidayatiOthmanKPFKKKSA2009.pdf
_version_	1747814888079622144

Synthesis, characterization and optimization of sulfonated polyether ether ketone composite membrane for direct methanol fuel cell

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