水溶性C60-乙烯基吡咯烷酮nm微球摩擦学行为

研究了一种新的水溶性富勒烯-乙烯基吡咯烷酮共聚物,TEM发现其水溶液中形貌为球状,平均粒径约为43nm.四球机试验表明,一定量的该富勒烯共聚物可有效提高水基液的承载能力、抗磨能力,减小摩擦系数,添加剂的最佳用量是其质量分数为0.3%.电子探针发现,添加该富勒烯共聚物可使磨斑变小,裂纹及点蚀凹坑明显减少;元素C和N在磨斑区均匀分布,表明该富勒烯共聚物在磨斑区形成连续膜.摩擦学性能的改善可能是由于该富勒烯共聚物可作为nm微球滚珠,引起了微观弹性滚动润滑.

The Tribological Behavior of Fullerene-Vinyl Pyrrolidone Copolymer Nanoball

A novel water soluble fullerene vinyl pyrrolidone copolymer was synthesized. TEM analyses show that it presents an ideal spherical shape in water with an average diameter of about 43nm. Four ball test shows that the addition of a certain concentration of the fullerene copolymer to base stock can effectively raise the load carrying capacity (PB value) and antiwear ability, and reduce the coefficient of friction. The optimum concentration of the additive was 0.3?%. Electron probe microanalysis indicated that the additive results in a reduce of wear scar diameter and the amount of crackle and pitting. Elements C and N were well distributed in the wear scar, implying that the fullerene copolymer forms continuous film on the rubbing surface. The improvements in friction, wear and load carrying capacity were probably due to the presence of the fullerene copolymer, which might act as nanoball bearings, led to microcosmic elastic rolling lubrication.