Polyvinylidene fluoride/graphene oxide nanocomposite as anti-corrosion coating in natural gas steel pipelines

Internal corrosion causes the mechanical strength of natural gas steel pipelines to be reduced, leading to cracking. Superior properties of polyvinylidene fluoride (PVDF) makes its as an excellent candidate for the anti-corrosion coating in natural gas steel pipelines. Nevertheless, further developm...

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Main Author:	Chiong, Sie Jing
Format:	Thesis
Language:	English
Published:	2017
Subjects:	TP Chemical technology
Online Access:	http://eprints.utm.my/id/eprint/77640/1/ChiongSieJingMFChE20171.pdf
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spelling	my-utm-ep.776402018-06-26T07:37:19Z Polyvinylidene fluoride/graphene oxide nanocomposite as anti-corrosion coating in natural gas steel pipelines 2017-03 Chiong, Sie Jing TP Chemical technology Internal corrosion causes the mechanical strength of natural gas steel pipelines to be reduced, leading to cracking. Superior properties of polyvinylidene fluoride (PVDF) makes its as an excellent candidate for the anti-corrosion coating in natural gas steel pipelines. Nevertheless, further development of PVDF nanocomposite is necessary to enhance the properties of neat PVDF in terms ofwettability, mechanical strength, anti-corrosion and impermeable property. In this research, monolayer 3aminopropyltriethoxysilane- graphene oxide (APTES-GO) with a thickness of 0.58 nm was successfully synthesized through surface functionalization of graphene oxide (GO). APTES-GO was selected as the nanofiller to be incorporated into the PVDF matrix. This is because PVDF/APTES-GO nanocomposite displayed better anticorrosion performance than GO. PVDF nanocomposites filled with various loadings of APTES-GO (0.1 to 0.5 wt%) were prepared using N,N-dimethylformamide as the solvent. The detailed anti-corrosion performance of PVDFIAPTES-GO nanocomposites coated onto carbon steel plate was evaluated using Machu, salt spray and acid immersion tests. X-ray diffraction and Fourier transform infrared spectroscopy confirmed thatthe increment ofAPTES-GO from 0.1 to 0.5 wt% loading had transformed ~- and y- to a-phase crystal. Field emission scanning electron microscopy revealed that the PVDF nanocomposite films with a thickness of 73.0 ± 3.61 urn exhibited features of the symmetric membranes. Atomic force microscopy analysis also showed that the surface roughness of PVDF nanocomposite films increased with the increase of APTES-GO loading. Besides that, PVDF nanocomposite filled with 0.4 wt% APTES-GO showed the highest water contact angle of 102° and ~306% increase in tensile modulus as compared to the neat PVDF. This nanocomposite layer (66.67 ± 4.0 urn) was found to exhibit good adhesion property with the lowest corrosion rate of 6.65 mm/yr and highest corrosion protection efficiency of 51.16% in corrosive environments. 2017-03 Thesis http://eprints.utm.my/id/eprint/77640/ http://eprints.utm.my/id/eprint/77640/1/ChiongSieJingMFChE20171.pdf application/pdf en public http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:105157 masters Universiti Teknologi Malaysia, Faculty of Chemical and Energy Engineering Faculty of Chemical and Energy Engineering
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
language	English
topic	TP Chemical technology
spellingShingle	TP Chemical technology Chiong, Sie Jing Polyvinylidene fluoride/graphene oxide nanocomposite as anti-corrosion coating in natural gas steel pipelines
description	Internal corrosion causes the mechanical strength of natural gas steel pipelines to be reduced, leading to cracking. Superior properties of polyvinylidene fluoride (PVDF) makes its as an excellent candidate for the anti-corrosion coating in natural gas steel pipelines. Nevertheless, further development of PVDF nanocomposite is necessary to enhance the properties of neat PVDF in terms ofwettability, mechanical strength, anti-corrosion and impermeable property. In this research, monolayer 3aminopropyltriethoxysilane- graphene oxide (APTES-GO) with a thickness of 0.58 nm was successfully synthesized through surface functionalization of graphene oxide (GO). APTES-GO was selected as the nanofiller to be incorporated into the PVDF matrix. This is because PVDF/APTES-GO nanocomposite displayed better anticorrosion performance than GO. PVDF nanocomposites filled with various loadings of APTES-GO (0.1 to 0.5 wt%) were prepared using N,N-dimethylformamide as the solvent. The detailed anti-corrosion performance of PVDFIAPTES-GO nanocomposites coated onto carbon steel plate was evaluated using Machu, salt spray and acid immersion tests. X-ray diffraction and Fourier transform infrared spectroscopy confirmed thatthe increment ofAPTES-GO from 0.1 to 0.5 wt% loading had transformed ~- and y- to a-phase crystal. Field emission scanning electron microscopy revealed that the PVDF nanocomposite films with a thickness of 73.0 ± 3.61 urn exhibited features of the symmetric membranes. Atomic force microscopy analysis also showed that the surface roughness of PVDF nanocomposite films increased with the increase of APTES-GO loading. Besides that, PVDF nanocomposite filled with 0.4 wt% APTES-GO showed the highest water contact angle of 102° and ~306% increase in tensile modulus as compared to the neat PVDF. This nanocomposite layer (66.67 ± 4.0 urn) was found to exhibit good adhesion property with the lowest corrosion rate of 6.65 mm/yr and highest corrosion protection efficiency of 51.16% in corrosive environments.
format	Thesis
qualification_level	Master's degree
author	Chiong, Sie Jing
author_facet	Chiong, Sie Jing
author_sort	Chiong, Sie Jing
title	Polyvinylidene fluoride/graphene oxide nanocomposite as anti-corrosion coating in natural gas steel pipelines
title_short	Polyvinylidene fluoride/graphene oxide nanocomposite as anti-corrosion coating in natural gas steel pipelines
title_full	Polyvinylidene fluoride/graphene oxide nanocomposite as anti-corrosion coating in natural gas steel pipelines
title_fullStr	Polyvinylidene fluoride/graphene oxide nanocomposite as anti-corrosion coating in natural gas steel pipelines
title_full_unstemmed	Polyvinylidene fluoride/graphene oxide nanocomposite as anti-corrosion coating in natural gas steel pipelines
title_sort	polyvinylidene fluoride/graphene oxide nanocomposite as anti-corrosion coating in natural gas steel pipelines
granting_institution	Universiti Teknologi Malaysia, Faculty of Chemical and Energy Engineering
granting_department	Faculty of Chemical and Energy Engineering
publishDate	2017
url	http://eprints.utm.my/id/eprint/77640/1/ChiongSieJingMFChE20171.pdf
_version_	1747817796678451200

Polyvinylidene fluoride/graphene oxide nanocomposite as anti-corrosion coating in natural gas steel pipelines

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