Enhancement of mechanical, thermal and dielectric properties of hybrid carbon nanotubes and alumina in epoxy nanocomposites

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dc.contributor.authorMuhammad Razlan Zakaria
dc.date.accessioned2021-04-09T08:35:15Z
dc.date.available2021-04-09T08:35:15Z
dc.date.issued2015-04-01
dc.description.abstractThe incorporation of carbon nanotube (CNT) in polymer nanocomposites has become challenges for researchers due to its dispersion in polymer matrix. This work focuses on CNT-alumina hybrid compound prepared via chemical vapor deposition (CVD) which is used to improve dispersion and enhance the mechanical, thermal and dielectric properties of epoxy nanocomposites. The CNT-alumina hybrid compound was successfully synthesized via CVD by using nickel catalyst under methane atmosphere at 800 °C. The physically mixed CNT-alumina was also prepared by ball milling method for comparison. The CNT-alumina hybrid compound and physically mixed CNT-alumina filled epoxy nanocomposites were characterized according to their filler loadings (i.e. 1% - 5%). The CNT-alumina hybrid compound had the size between 10 – 30 nm and 12 Wt % of carbon according to field emission scanning electron microscope (FESEM), high resolution transmission electron microscope (HRTEM) and energy dispersive x-ray (EDX) analysis respectively, while x-ray diffraction (XRD) revealed the existence of carbon phase among several phases of alumina. The CNT-alumina hybrid compound filled epoxy nanocomposites assessments showed higher mechanical, thermal and dielectric properties than the physically mixed CNT-alumina filled epoxy nanocomposites. This increase is associated with the homogeneous dispersion of CNT-alumina hybrid compound as observed from FESEM and HRTEM. It was demonstrated that the CNT-alumina hybrid compound filled epoxy nanocomposites are capable of increasing tensile strength by up to 30%, giving tensile modulus of 39%, flexural strength of 30%, flexural modulus of 35%, hardness of 17%, thermal conductivity of 20%, glass transition temperature value of 25% and dielectric constant of 20% when compared to a neat epoxy.en_US
dc.identifier.urihttp://hdl.handle.net/123456789/12712
dc.language.isoenen_US
dc.titleEnhancement of mechanical, thermal and dielectric properties of hybrid carbon nanotubes and alumina in epoxy nanocompositesen_US
dc.typeThesisen_US
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