Preparation and characterization of polyvinyl alcohol- graphene oxide/poly(3,4-ethylenedioxythiophene) composite nanofiber

Electrically conductive nanofibers are nanostructured materials which attracted extensive interest for their superior properties. These materials are being studied in various research fields include, electrochemistry, material science and electronic applications. In this work, conducting nanofibers...

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主要作者:	Zubair, Nur Afifah
格式:	Thesis
语言:	English
出版:	2016
主题:	Composite materials Nanofibers
在线阅读:	http://psasir.upm.edu.my/id/eprint/69111/1/FS%202016%2039%20IR.pdf
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id	my-upm-ir.69111
record_format	uketd_dc
spelling	my-upm-ir.691112019-06-27T02:51:19Z Preparation and characterization of polyvinyl alcohol- graphene oxide/poly(3,4-ethylenedioxythiophene) composite nanofiber 2016-08 Zubair, Nur Afifah Electrically conductive nanofibers are nanostructured materials which attracted extensive interest for their superior properties. These materials are being studied in various research fields include, electrochemistry, material science and electronic applications. In this work, conducting nanofibers composed of polyvinyl alcohol (PVA), graphene oxide (GO) and poly(3,4-ethylenedioxythiophene) (PEDOT) were fabricated via a combined method using electrospinning and electropolymerization techniques. During electrospinning, the concentration of PVA or PVA-GO solution, and the applied voltage were deliberately altered in order to determine the optimized electrospinning conditions. The optimized parameters with 0.1 mg/mL of GO and 10 w/v% of PVA concentration with electrospinning voltage of 15 kV were obtained. The electrospun PVA and PVA-GO nanofiber mats were further modified by coating with the conjugated polymer, PEDOT using electropolymerization techniques which is a facile approach for coating the nanofibers. SEM images of the obtained nanofibers revealed that PEDOT grew well on the surface of the electrospun nanofibers during the potentiostatic mode of the electropolymerization process. The presence of GO and PEDOT in nanofiber was confirmed by FTIR and Raman spectroscopy analyses. The optimum electropolymerization of PEDOT was at potential of 1.2 V in 5 mins. The electrochemical measurements demonstrated that the PVA–GO/PEDOT composite nanofiber could enhance the current response and reduce the charge transfer resistance of the nanofiber. The equivalent circuit models were used to fit the impedance spectra of PEDOT, PVA/PEDOT and PVA-GO/PEDOT nanofibers where the spectra were fitted well. Composite materials Nanofibers 2016-08 Thesis http://psasir.upm.edu.my/id/eprint/69111/ http://psasir.upm.edu.my/id/eprint/69111/1/FS%202016%2039%20IR.pdf text en public masters Universiti Putra Malaysia Composite materials Nanofibers
institution	Universiti Putra Malaysia
collection	PSAS Institutional Repository
language	English
topic	Composite materials Nanofibers
spellingShingle	Composite materials Nanofibers Zubair, Nur Afifah Preparation and characterization of polyvinyl alcohol- graphene oxide/poly(3,4-ethylenedioxythiophene) composite nanofiber
description	Electrically conductive nanofibers are nanostructured materials which attracted extensive interest for their superior properties. These materials are being studied in various research fields include, electrochemistry, material science and electronic applications. In this work, conducting nanofibers composed of polyvinyl alcohol (PVA), graphene oxide (GO) and poly(3,4-ethylenedioxythiophene) (PEDOT) were fabricated via a combined method using electrospinning and electropolymerization techniques. During electrospinning, the concentration of PVA or PVA-GO solution, and the applied voltage were deliberately altered in order to determine the optimized electrospinning conditions. The optimized parameters with 0.1 mg/mL of GO and 10 w/v% of PVA concentration with electrospinning voltage of 15 kV were obtained. The electrospun PVA and PVA-GO nanofiber mats were further modified by coating with the conjugated polymer, PEDOT using electropolymerization techniques which is a facile approach for coating the nanofibers. SEM images of the obtained nanofibers revealed that PEDOT grew well on the surface of the electrospun nanofibers during the potentiostatic mode of the electropolymerization process. The presence of GO and PEDOT in nanofiber was confirmed by FTIR and Raman spectroscopy analyses. The optimum electropolymerization of PEDOT was at potential of 1.2 V in 5 mins. The electrochemical measurements demonstrated that the PVA–GO/PEDOT composite nanofiber could enhance the current response and reduce the charge transfer resistance of the nanofiber. The equivalent circuit models were used to fit the impedance spectra of PEDOT, PVA/PEDOT and PVA-GO/PEDOT nanofibers where the spectra were fitted well.
format	Thesis
qualification_level	Master's degree
author	Zubair, Nur Afifah
author_facet	Zubair, Nur Afifah
author_sort	Zubair, Nur Afifah
title	Preparation and characterization of polyvinyl alcohol- graphene oxide/poly(3,4-ethylenedioxythiophene) composite nanofiber
title_short	Preparation and characterization of polyvinyl alcohol- graphene oxide/poly(3,4-ethylenedioxythiophene) composite nanofiber
title_full	Preparation and characterization of polyvinyl alcohol- graphene oxide/poly(3,4-ethylenedioxythiophene) composite nanofiber
title_fullStr	Preparation and characterization of polyvinyl alcohol- graphene oxide/poly(3,4-ethylenedioxythiophene) composite nanofiber
title_full_unstemmed	Preparation and characterization of polyvinyl alcohol- graphene oxide/poly(3,4-ethylenedioxythiophene) composite nanofiber
title_sort	preparation and characterization of polyvinyl alcohol- graphene oxide/poly(3,4-ethylenedioxythiophene) composite nanofiber
granting_institution	Universiti Putra Malaysia
publishDate	2016
url	http://psasir.upm.edu.my/id/eprint/69111/1/FS%202016%2039%20IR.pdf
_version_	1747812665585041408

Preparation and characterization of polyvinyl alcohol- graphene oxide/poly(3,4-ethylenedioxythiophene) composite nanofiber

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