小牛血清边界润滑条件下西佛碱铜配合物改性超高分子量聚乙烯往复摩擦磨损行为
Reciprocating Friction and Wear Characteristics of UHMWPE Modified with Schiff Base Copper(Ⅱ) Complex under Boundary Lubrication in Calf Serum
-
摘要: 采用自行研制的往复摩擦磨损试验机,在小牛血清边界润滑条件下,研究了含5wt%?10wt%?15wt.%乙二胺缩水杨醛西佛碱(Schiffbase)铜(Ⅱ)配合物的改性超高分子量聚乙烯(UHMWPE)与钛合金(Ti6Al4V)配副的往复摩擦磨损性能.利用扫描电子显微镜及白光共焦三维轮廓仪观察其磨损表面形貌,采用EDS和XPS分析磨损表面的主要元素组成及其价态,并探讨其磨损机理.结果表明:在15%质量分数范围内,随乙二胺缩水杨醛Schiff碱铜(Ⅱ)配合物加入量的增加,改性UHMWPE与钛合金配副的摩擦系数逐步降低,耐磨性逐步提高;磨损机制均为三体磨料磨损.Abstract: Friction and wear characteristics of ultrahigh molecular weight polyethylene(UHMWPE) modified with 5wt.%,10wt.% and15wt.% Cu(II) chelate of bissalicylaldehyde - ethylenediamine (Schiff base copper complex) against titanium alloy(Ti6Al4V) were tested with a reciprocating tribo-tester under boundary lubrication in calf serum.To investigate wear mechanism of the modified UHMWPE, topographies of worn surfaces were observed by SEM and confocal white light microscope (CWLM), and chemical composition as well as chemical states of worn surface were analyzed by energy dispersive spectroscopy(EDS) and X-ray photoelectronic spectroscopy(XPS).The results showed that the friction and wear of UHMWPE were improved obviously by Cu (II) chelate of bissalicylaldehyde-ethylenediamine.And friction and wear of the rubbing pairs were reduced with the increasing content (upto15wt%)of Cu(II) chelate of bissalicylaldehyde-ethylenediamine in UHMWPE. The wear mode was three-body abrasive wear
下载: