Phosphoric acid membrane by radiation induced grafting of 4-vinylpyridine onto poly(ethylene-co-tetrafluoro ethylene) film followed by phosphorylation

Proton conducting membrane prepared by phosphoric acid doping of poly 4-vinylpyridine (4-VP) grafted onto poly (ethylene-co-tetrafluoroethylene) ETFE film was studied. The effect of grafting conditions of 4-VP onto ETFE film, such as i) irradiation dose ii) monomer concentration iii) reaction time i...

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Main Author:	Ghassemi, Payman
Format:	Thesis
Language:	English
Published:	2011
Subjects:	TP Chemical technology
Online Access:	http://eprints.utm.my/id/eprint/32781/5/PaymanGhassemiMFKKKSA2011.pdf
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spelling	my-utm-ep.327812018-05-27T07:51:38Z Phosphoric acid membrane by radiation induced grafting of 4-vinylpyridine onto poly(ethylene-co-tetrafluoro ethylene) film followed by phosphorylation 2011-11 Ghassemi, Payman TP Chemical technology Proton conducting membrane prepared by phosphoric acid doping of poly 4-vinylpyridine (4-VP) grafted onto poly (ethylene-co-tetrafluoroethylene) ETFE film was studied. The effect of grafting conditions of 4-VP onto ETFE film, such as i) irradiation dose ii) monomer concentration iii) reaction time iv) reaction temperature and v) solvent type on degree of grafting (G%) was studied. The G% was found to be increased as the irradiation dose increased. Moreover, the increase in the i) monomer concentration ii) reaction time iii) reaction temperature was found to lead to an increase in the G% until a maximum value was reached at a concentration of 60 vol.% beyond which, it dropped. Among all employed solvents, ethanol for 4-VP was found to be the best diluents. Optimization using response surface method (RSM) by The Box-Behnken module available in the design expert software was used to optimize the grafting parameters; i) absorbed dose ii) monomer concentration, iii) grafting time v) grafting temperature varied in four levels in correlation with the degree of grafting G%. A maximum degree of grafting of 57% was experimentally achieved at optimum parameters; i) monomer concentration of 48 vol.% ii) absorbed dose of 64 kGy iii) reaction time of 4h iv) reaction medium temperature of 69°C. The value of G% was found to be 4% lower than that predicted by model i.e. 61%, which is very acceptable. The grafted film then functionalized with phosphoric acid doping in various G% .The membranes achieved proton conductivity as a function of level of acid doping and G%. Fourier transform infrared (FTIR), thermo gravimetric analysis (TGA) and x-ray diffraction (XRD) were used to investigate the properties of the obtained membranes and provide evidence for grafting and phosphorylation. 2011-11 Thesis http://eprints.utm.my/id/eprint/32781/ http://eprints.utm.my/id/eprint/32781/5/PaymanGhassemiMFKKKSA2011.pdf application/pdf en public http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:69595?site_name=Restricted Repository masters Universiti Teknologi Malaysia, Faculty of Chemical Engineering Faculty of Chemical Engineering
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
language	English
topic	TP Chemical technology
spellingShingle	TP Chemical technology Ghassemi, Payman Phosphoric acid membrane by radiation induced grafting of 4-vinylpyridine onto poly(ethylene-co-tetrafluoro ethylene) film followed by phosphorylation
description	Proton conducting membrane prepared by phosphoric acid doping of poly 4-vinylpyridine (4-VP) grafted onto poly (ethylene-co-tetrafluoroethylene) ETFE film was studied. The effect of grafting conditions of 4-VP onto ETFE film, such as i) irradiation dose ii) monomer concentration iii) reaction time iv) reaction temperature and v) solvent type on degree of grafting (G%) was studied. The G% was found to be increased as the irradiation dose increased. Moreover, the increase in the i) monomer concentration ii) reaction time iii) reaction temperature was found to lead to an increase in the G% until a maximum value was reached at a concentration of 60 vol.% beyond which, it dropped. Among all employed solvents, ethanol for 4-VP was found to be the best diluents. Optimization using response surface method (RSM) by The Box-Behnken module available in the design expert software was used to optimize the grafting parameters; i) absorbed dose ii) monomer concentration, iii) grafting time v) grafting temperature varied in four levels in correlation with the degree of grafting G%. A maximum degree of grafting of 57% was experimentally achieved at optimum parameters; i) monomer concentration of 48 vol.% ii) absorbed dose of 64 kGy iii) reaction time of 4h iv) reaction medium temperature of 69°C. The value of G% was found to be 4% lower than that predicted by model i.e. 61%, which is very acceptable. The grafted film then functionalized with phosphoric acid doping in various G% .The membranes achieved proton conductivity as a function of level of acid doping and G%. Fourier transform infrared (FTIR), thermo gravimetric analysis (TGA) and x-ray diffraction (XRD) were used to investigate the properties of the obtained membranes and provide evidence for grafting and phosphorylation.
format	Thesis
qualification_level	Master's degree
author	Ghassemi, Payman
author_facet	Ghassemi, Payman
author_sort	Ghassemi, Payman
title	Phosphoric acid membrane by radiation induced grafting of 4-vinylpyridine onto poly(ethylene-co-tetrafluoro ethylene) film followed by phosphorylation
title_short	Phosphoric acid membrane by radiation induced grafting of 4-vinylpyridine onto poly(ethylene-co-tetrafluoro ethylene) film followed by phosphorylation
title_full	Phosphoric acid membrane by radiation induced grafting of 4-vinylpyridine onto poly(ethylene-co-tetrafluoro ethylene) film followed by phosphorylation
title_fullStr	Phosphoric acid membrane by radiation induced grafting of 4-vinylpyridine onto poly(ethylene-co-tetrafluoro ethylene) film followed by phosphorylation
title_full_unstemmed	Phosphoric acid membrane by radiation induced grafting of 4-vinylpyridine onto poly(ethylene-co-tetrafluoro ethylene) film followed by phosphorylation
title_sort	phosphoric acid membrane by radiation induced grafting of 4-vinylpyridine onto poly(ethylene-co-tetrafluoro ethylene) film followed by phosphorylation
granting_institution	Universiti Teknologi Malaysia, Faculty of Chemical Engineering
granting_department	Faculty of Chemical Engineering
publishDate	2011
url	http://eprints.utm.my/id/eprint/32781/5/PaymanGhassemiMFKKKSA2011.pdf
_version_	1747816058916438016

Phosphoric acid membrane by radiation induced grafting of 4-vinylpyridine onto poly(ethylene-co-tetrafluoro ethylene) film followed by phosphorylation

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