Effect of the carbon nanotube diameter on wear resistance of MWCNTs/PMMA composite system with four diameters was studied in this paper.Mixed-acids treatment was employed to modify MWCNTs

in-situ bulk polymerization was used to prepare the composites

and wear resistance of the composites was evaluated by using the set of weights.Results show that: The dispersion stability of MWCNTs modified with the mixed acids in MMA is enhanced greatly;L-MWNTs-4060 has the best dispersion in the matrix PMMA

while L-MWNTs-...