Wear and Friction Behavior of Epoxy/MWCNTs Nanocomposites under Dry Sliding Conditions
Md. Naushad Ali,
The dry sliding wear and friction behavior of epoxy reinforced with Multi-walled Carbon Nanotubes (MWCNTs) were investigated
using pin on disc machine. The MWCNTs with the weight fraction of 0.1wt.%, 0.5wt.%, 1.25wt.%, 2.5wt.% and 5wt.% in the
epoxy/MWCNTs were used in this study. A pin of 6mm diameter as epoxy/MWCNTs nanocomposites was slide against steel disc at a
speed of 200rpm under the load of 60N. Wear performance was observed with the sliding distance of 942m in 30min.The experimental
investigation showed that the addition of MWCNTs in considerable amount can improve the wear performance of epoxy/MWCNTs
nanocomposites. The specific wear rate and friction co-efficient of the nanocomposites decrease with the increase of MWCNTs content
until the weight fraction of 1.25wt.% is achieved. However, the weight fraction of 1.25wt.% of MWCNTs nanocomposites shows superior
wear resistance than pure epoxy. Furthermore, addition of MWCNTs forms localized bundle and does not exhibit significant improvement
of wear performance due to non homogeneous dispersion in the epoxy matrix. Field Emission Scanning Electron Microscope
(FESEM) was utilized to examine localized bundle of MWCNTs, wave formation of the fracture surface, as well as rough and smooth
morphology of worn surface in pin material. The typical topographical analysis of pure and functionalized MWCNTs was examined by
transmission electron microscopy (TEM).
Keywords: Epoxy, friction, multi-walled carbon nanotubes, polymer nanocomposites, SEM, wear.
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