Preparation and characterization of cntepoxy nanocomposites using colloidal polymerization method
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Date
2018-06
Authors
Muhamad Nabil Faizul Hilmy
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Abstract
Multiwalled Carbon Nanotube (MWCNTs) have an excellent properties to be
used as a reinforcement material. However, due to its own nature behaviour, it tend to
agglomerate in epoxy and this reduces the properties of nanocomposites. Oxidation by
Hummers method is to overcome the agglomeration, but oxidized MWCNTs tend to
re-agglomerate in epoxy. MWCNTs/epoxy nanocomposite sample have been prepared
using colloidal polymerization method to overcome the re-agglomeration problem.
The oMWCNTs have been mixed first with the low viscosity of TMD hardener. Field
emission electron microscope (FESEM) proved that the oxidation reduce the
entanglement of MWCNTs in order to produce better dispersion. HRTEM shows
presence of damage at the surface of MWCNTs after oxidation. The reduction of
crystallinity due to oxidation proved through XRD. Meanwhile, Raman spectroscopy
shows the increase of defect through the D-band after oxidation. The presence of
carboxyl functional group on the surface of MWCNTs after oxidation have been
proved by FTIR. The oMWCNTs/epoxy nanocomposites prepared by colloidal
polymerization method recorded the highest value for tensile strength. Apart from that,
it also have the highest value for the thermal conductivity and also for dielectric
constant.