Indentation and Scratch Behavior of Functionalized MWCNT-PMMA Composites at the Micro/Nanoscale

摘要

Polymethylmethacrylate (PMMA) and functionalized multiwalled carbon nanotube (F-MWCNT) based composite films were prepared using solution casting method. Nanoindentation and scratch measurements were carried out to study the influence of F-MWCNT as the reinforcement on the mechanical properties of the composite at the sub-micron scale. The composites were prepared with varying weight percentages of F-MWCNT in the PMMA matrix. The composites containing an adequate amount (0.25 wt%) of F-MWCNT was found to demonstrate the maximum nanomechan-ical properties, viz. hardness, elastic modulus, recovery index. Scratch resistance measured in terms of coefficient of friction, also showed maximum value for the PMMA composite reinforced with 0.25 wt% of F-MWCNT.