Enhancing tensile properties of carbon fiber-reinforced polypropylene composite using carbon Nanotube coating

Carbon fibers, when used without any surface treatments, will produce composites with low interlaminar shear strength (ILSS) which attributed largely to weak bonding between the fiber and the matrix. CNT-coating treatment was conducted to improve carbon fiber-matrix interfacial bonding. This treatme...

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Main Author:	Sayed Mohamed Zain, Sharifah Mazrah
Format:	Thesis
Language:	English
Published:	2009
Subjects:	Fiber reinforced Composite Nanotubes
Online Access:	http://psasir.upm.edu.my/id/eprint/51540/1/FK%202009%20112RR.pdf
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id	my-upm-ir.51540
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spelling	my-upm-ir.515402017-03-29T08:01:13Z Enhancing tensile properties of carbon fiber-reinforced polypropylene composite using carbon Nanotube coating 2009-11 Sayed Mohamed Zain, Sharifah Mazrah Carbon fibers, when used without any surface treatments, will produce composites with low interlaminar shear strength (ILSS) which attributed largely to weak bonding between the fiber and the matrix. CNT-coating treatment was conducted to improve carbon fiber-matrix interfacial bonding. This treatment was done by growing carbon nanotubes (CNTs) directly on carbon fibers using chemical vapor deposition (CVD) to create CNT-coated carbon fibers. The objectives was to study the microscopic morphology of CNTs formation on the surface of carbon fibers at various treatment conditions, to study the interfacial shear strength (IFSS) of CNT-coated carbon fibers, tensile properties and thermal stability of CNT-coated carbon fiber composites as well as comparison with untreated and commercial carbon fibers. The CNTs were produced by a benzene-ferrocene gas reaction inside a high temperature tube furnace. The reaction temperature, the carrier gas flow rate and weight of ferrocene were varied at 700 oC, 800oC and 900oC; 100 ml/min and 300 ml/min; 0.3 g, 0.5 g and 1.0 g respectively and the reaction time for CNT growth was set at 30 minutes. The microscopic morphology of CNTs formation on the surface of carbon fibers was observed using scanning electron microscopy (SEM) and transmission electron microscopy (TEM) before it was fabricated into composites. The composites were prepared by melt blending with polypropylene (PP) at different fiber content of 2, 4, 6, 8, 10 and 12 wt. %. It showed that CNTs were successfully grown on carbon fibers at reaction temperature of 800oC and 900oC. Interfacial shear strength of CNT-coated fibers improved up to 499% compared to untreated fibers. Tensile properties increased with the increase of fiber loading from 2 wt. % - 10 wt. % and decreased at 12 wt. % fiber content. With addition of 10 wt. % of CNT-coated CFPP composites,the tensile strength and modulus increased up to 36% and 85%, respectively. CNTcoated CFPP composites were more resistant to deformation, but had lower strength when compared with commercial CFPP composites. The thermal stability of CNTcoated CFPP composites showed an increment compared to the untreated CFPP composite. As conclusion, CNT-coating treatment using parameters treated at reaction temperature of 800oC; 300 ml/min hydrogen flow rate and 1.0 g of ferrocene showed the most amounts of CNTs with fewer impurities which also exhibited the best performance in IFSS, tensile properties and highest onset degradation temperature, 325oC making it the best designation for this CNT-coating treatment using current thermal CVD set-up. Fiber reinforced Composite Nanotubes 2009-11 Thesis http://psasir.upm.edu.my/id/eprint/51540/ http://psasir.upm.edu.my/id/eprint/51540/1/FK%202009%20112RR.pdf application/pdf en public masters Universiti Putra Malaysia Fiber reinforced Composite Nanotubes
institution	Universiti Putra Malaysia
collection	PSAS Institutional Repository
language	English
topic	Fiber reinforced Composite Nanotubes
spellingShingle	Fiber reinforced Composite Nanotubes Sayed Mohamed Zain, Sharifah Mazrah Enhancing tensile properties of carbon fiber-reinforced polypropylene composite using carbon Nanotube coating
description	Carbon fibers, when used without any surface treatments, will produce composites with low interlaminar shear strength (ILSS) which attributed largely to weak bonding between the fiber and the matrix. CNT-coating treatment was conducted to improve carbon fiber-matrix interfacial bonding. This treatment was done by growing carbon nanotubes (CNTs) directly on carbon fibers using chemical vapor deposition (CVD) to create CNT-coated carbon fibers. The objectives was to study the microscopic morphology of CNTs formation on the surface of carbon fibers at various treatment conditions, to study the interfacial shear strength (IFSS) of CNT-coated carbon fibers, tensile properties and thermal stability of CNT-coated carbon fiber composites as well as comparison with untreated and commercial carbon fibers. The CNTs were produced by a benzene-ferrocene gas reaction inside a high temperature tube furnace. The reaction temperature, the carrier gas flow rate and weight of ferrocene were varied at 700 oC, 800oC and 900oC; 100 ml/min and 300 ml/min; 0.3 g, 0.5 g and 1.0 g respectively and the reaction time for CNT growth was set at 30 minutes. The microscopic morphology of CNTs formation on the surface of carbon fibers was observed using scanning electron microscopy (SEM) and transmission electron microscopy (TEM) before it was fabricated into composites. The composites were prepared by melt blending with polypropylene (PP) at different fiber content of 2, 4, 6, 8, 10 and 12 wt. %. It showed that CNTs were successfully grown on carbon fibers at reaction temperature of 800oC and 900oC. Interfacial shear strength of CNT-coated fibers improved up to 499% compared to untreated fibers. Tensile properties increased with the increase of fiber loading from 2 wt. % - 10 wt. % and decreased at 12 wt. % fiber content. With addition of 10 wt. % of CNT-coated CFPP composites,the tensile strength and modulus increased up to 36% and 85%, respectively. CNTcoated CFPP composites were more resistant to deformation, but had lower strength when compared with commercial CFPP composites. The thermal stability of CNTcoated CFPP composites showed an increment compared to the untreated CFPP composite. As conclusion, CNT-coating treatment using parameters treated at reaction temperature of 800oC; 300 ml/min hydrogen flow rate and 1.0 g of ferrocene showed the most amounts of CNTs with fewer impurities which also exhibited the best performance in IFSS, tensile properties and highest onset degradation temperature, 325oC making it the best designation for this CNT-coating treatment using current thermal CVD set-up.
format	Thesis
qualification_level	Master's degree
author	Sayed Mohamed Zain, Sharifah Mazrah
author_facet	Sayed Mohamed Zain, Sharifah Mazrah
author_sort	Sayed Mohamed Zain, Sharifah Mazrah
title	Enhancing tensile properties of carbon fiber-reinforced polypropylene composite using carbon Nanotube coating
title_short	Enhancing tensile properties of carbon fiber-reinforced polypropylene composite using carbon Nanotube coating
title_full	Enhancing tensile properties of carbon fiber-reinforced polypropylene composite using carbon Nanotube coating
title_fullStr	Enhancing tensile properties of carbon fiber-reinforced polypropylene composite using carbon Nanotube coating
title_full_unstemmed	Enhancing tensile properties of carbon fiber-reinforced polypropylene composite using carbon Nanotube coating
title_sort	enhancing tensile properties of carbon fiber-reinforced polypropylene composite using carbon nanotube coating
granting_institution	Universiti Putra Malaysia
publishDate	2009
url	http://psasir.upm.edu.my/id/eprint/51540/1/FK%202009%20112RR.pdf
_version_	1747812061069443072

Enhancing tensile properties of carbon fiber-reinforced polypropylene composite using carbon Nanotube coating

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