Characterization of carbon nanotube epoxy composites and carbon nanotubes/laminated carbon fibre epoxy composites

Over the last few decades carbon fibre reinforced polymer (CFRP) was used extensively because it offers attractive mechanical and thermal properties. Aircraft and some of high-end automobile constructions used CFRP, as it has an ability to be stuctured to aerodynamic efficient confi...

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Main Author:	Mohd Tamyis, Najihah
Format:	Thesis
Language:	English
Published:	2019
Subjects:	Carbon fibers Epoxy resins Composite materials
Online Access:	http://psasir.upm.edu.my/id/eprint/85576/1/FK%202020%2027%20-%20ir.pdf
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spelling	my-upm-ir.855762021-12-10T03:36:42Z Characterization of carbon nanotube epoxy composites and carbon nanotubes/laminated carbon fibre epoxy composites 2019-08 Mohd Tamyis, Najihah Over the last few decades carbon fibre reinforced polymer (CFRP) was used extensively because it offers attractive mechanical and thermal properties. Aircraft and some of high-end automobile constructions used CFRP, as it has an ability to be stuctured to aerodynamic efficient configurations. However, multi –layer laminates failure behavior is complex especially woven fabric composites. CFRPs’ typical failure modes include matrix fracture, interface debonding between fibre and matrix and interlaminar delamination. One of the techniques to overcome such failure modes is by reinforcing the composites with nanoparticles. In this study, the objective is to develop a tougher resin by dispersing multiwalled carbon nanotubes (MWCNTs) into the resin which will improve the properties of CFRP composites. Two types of MWCNTs were used which lengths, a) MWCNT_long (length 10-30 μm) and b) MWCNT_short (length 0.5-2 μm). There are two main parts in this thesis i.e., the investigation of mechanical and thermal properties of MWCNT_modified-epoxy and the investigation of mechanical properties of the MWCNT_filled-CFRP composite with an emphasis on interlaminar shear strength behaviour. In the first part, an experiment was conducted to investigate the dispersion quality of MWCNTs as nanofillers in the resin systems. The effect of MWCNTs on compressive and flexural properties of epoxy polymers were studied. The epoxy resin used was Epikote 828 and dapsone (DDS) as the hardener. The thermal properties of MWCNT_modified-Epikote 828 as compared to Epikote828/DDS neat systems were also investigated. From the results, the addition of MWCNT_short into Epikote 828 has significantly enhanced the compressive and flexural modulus. The second investigation was done to study the effect of MWCNT on the interlaminar shear strength (ILSS) properties of Epikote828/CFRP composite. A number of plane weave carbon fibre (CF) laminates were fabricated using the hand- layup technique, wet resin impregnation and vacuum bagging techniques. The quality of laminate such as void content, fibre and MWCNTs volume fraction was examined. Short beam shear (SBS) test was performed on the plane weave laminates to test the quality of ILSS. It was found that the ILSS of MWCNT_short/Epikote828/CF CFRP composite was better than the neat Epikote828/DDS CFRP composites. The addition of 0.38% of MWCNT_short improved the ILSS of the CF/Epikote828 by 14 %. Carbon fibers Epoxy resins Composite materials 2019-08 Thesis http://psasir.upm.edu.my/id/eprint/85576/ http://psasir.upm.edu.my/id/eprint/85576/1/FK%202020%2027%20-%20ir.pdf text en public doctoral Universiti Putra Malaysia Carbon fibers Epoxy resins Composite materials Hassan, Mohd Roshdi
institution	Universiti Putra Malaysia
collection	PSAS Institutional Repository
language	English
advisor	Hassan, Mohd Roshdi
topic	Carbon fibers Epoxy resins Composite materials
spellingShingle	Carbon fibers Epoxy resins Composite materials Mohd Tamyis, Najihah Characterization of carbon nanotube epoxy composites and carbon nanotubes/laminated carbon fibre epoxy composites
description	Over the last few decades carbon fibre reinforced polymer (CFRP) was used extensively because it offers attractive mechanical and thermal properties. Aircraft and some of high-end automobile constructions used CFRP, as it has an ability to be stuctured to aerodynamic efficient configurations. However, multi –layer laminates failure behavior is complex especially woven fabric composites. CFRPs’ typical failure modes include matrix fracture, interface debonding between fibre and matrix and interlaminar delamination. One of the techniques to overcome such failure modes is by reinforcing the composites with nanoparticles. In this study, the objective is to develop a tougher resin by dispersing multiwalled carbon nanotubes (MWCNTs) into the resin which will improve the properties of CFRP composites. Two types of MWCNTs were used which lengths, a) MWCNT_long (length 10-30 μm) and b) MWCNT_short (length 0.5-2 μm). There are two main parts in this thesis i.e., the investigation of mechanical and thermal properties of MWCNT_modified-epoxy and the investigation of mechanical properties of the MWCNT_filled-CFRP composite with an emphasis on interlaminar shear strength behaviour. In the first part, an experiment was conducted to investigate the dispersion quality of MWCNTs as nanofillers in the resin systems. The effect of MWCNTs on compressive and flexural properties of epoxy polymers were studied. The epoxy resin used was Epikote 828 and dapsone (DDS) as the hardener. The thermal properties of MWCNT_modified-Epikote 828 as compared to Epikote828/DDS neat systems were also investigated. From the results, the addition of MWCNT_short into Epikote 828 has significantly enhanced the compressive and flexural modulus. The second investigation was done to study the effect of MWCNT on the interlaminar shear strength (ILSS) properties of Epikote828/CFRP composite. A number of plane weave carbon fibre (CF) laminates were fabricated using the hand- layup technique, wet resin impregnation and vacuum bagging techniques. The quality of laminate such as void content, fibre and MWCNTs volume fraction was examined. Short beam shear (SBS) test was performed on the plane weave laminates to test the quality of ILSS. It was found that the ILSS of MWCNT_short/Epikote828/CF CFRP composite was better than the neat Epikote828/DDS CFRP composites. The addition of 0.38% of MWCNT_short improved the ILSS of the CF/Epikote828 by 14 %.
format	Thesis
qualification_level	Doctorate
author	Mohd Tamyis, Najihah
author_facet	Mohd Tamyis, Najihah
author_sort	Mohd Tamyis, Najihah
title	Characterization of carbon nanotube epoxy composites and carbon nanotubes/laminated carbon fibre epoxy composites
title_short	Characterization of carbon nanotube epoxy composites and carbon nanotubes/laminated carbon fibre epoxy composites
title_full	Characterization of carbon nanotube epoxy composites and carbon nanotubes/laminated carbon fibre epoxy composites
title_fullStr	Characterization of carbon nanotube epoxy composites and carbon nanotubes/laminated carbon fibre epoxy composites
title_full_unstemmed	Characterization of carbon nanotube epoxy composites and carbon nanotubes/laminated carbon fibre epoxy composites
title_sort	characterization of carbon nanotube epoxy composites and carbon nanotubes/laminated carbon fibre epoxy composites
granting_institution	Universiti Putra Malaysia
publishDate	2019
url	http://psasir.upm.edu.my/id/eprint/85576/1/FK%202020%2027%20-%20ir.pdf
_version_	1747813563689336832

Characterization of carbon nanotube epoxy composites and carbon nanotubes/laminated carbon fibre epoxy composites

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