Abstract:
A novel fullerene-styrene-maleic anhydride copolymer is
reported. TEM analyses shows it is water-soluble nanoball of
average diameter of about 83 nm.The tribological behavior is
evaluated by four-ball machine. It was found that addition of
fullerene copolymer to base stock(2% triethanolamine aqueous
solution) resulted in a raise in load-carrying ability (F
value) from 130 N to maximum 480 N, and a reduction in coefficient
of friction from 0.235 to minimum 0.063.SEM analyses indicates
that the wear scars obtained with fullerene copolymer exhibited
mild scratches, while sharp grooving and serious pull-out
phenomenon were observed in the presence of base stock without
additive. The improvements in friction, wear and load-carrying
capacity are probably due to the presence of fullerene copolymer
nanoballs, which may act as molecule ball bearings, which in turn
lead to elastic rolling lubrication.
Key words: Water-soluble Fullerence copolymer Nanoball Friction and water Microcosmic
elastic rolling
*
This project
is supported by National Natural Science Foundation of China (29674010)
and State Key Lab of Plastic Foming Simulation and Die & Mould tech. Manuscript received on
August 11, 1999; revised manuscript November 11, 1999
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