双水杨醛缩1,6-己二胺Schiff碱铜配合物改性UHMWPE新型耐磨材料的研究

分别对含不同质量分数(2.5wt％、5wt％、10wt％、15wt％)的双水杨醛缩二胺型Schiff碱Cu(Ⅱ)配合物的改性UHMWPE与45#钢配副进行了干摩擦条件下的销-盘摩擦磨损试验,并采用SEM观察试样磨损表面形貌,采用EDS分析销试样未磨损及磨损表面的主要元素组成,探讨其磨损机理.结果表明:在15wt％质量分数范围内,随着双水杨醛缩1,6-己二胺Schiff碱铜配合物添加量的增加,改性UHMWPE与钢配副的摩擦系数逐步降低,耐磨性逐步提高,其中磨损最轻的是含10wt％双水杨醛缩1,6-己二胺Schiff碱Cu(Ⅱ)配合物的改性UHMWPE；磨损机制均为磨粒磨损,并发现Schiff碱Cu(Ⅱ)配合物添加剂中的Cu元素发生了选择性转移效应.

Study on a new wear resistant material of UHMWPE modified with Cu ( Ⅱ ) chelate of bissalicylaldehyde-1,6-hexanediamine

Friction and wear characteristics of ultra high molecular weight polyethylene(UHMWPE) modified with 2.5wt%,5wt%,10wt% and 15wt% Cu(Ⅱ) chelate of bissalicylaldehyde-1,6-hexanediamine(Schiff base copper complex) against steel(45#) were tested by a pin-disk tribo-tester in dry.To investigate wear mechanism of the modified UHMWPE,topographies of worn surfaces were observed by SEM and their chemical composition was also analyzed by energy dispersive spectroscopy(EDS).The results showed that the friction and wear of UHMWPE were improved obviously by Cu(II) chelate of bissalicylaldehyde-1,6-hexanediamine,and friction and wear of the rubbing pairs were reduced with the increasing content of Cu(Ⅱ) chelate of bissalicylaldehyde-1,6-hexane diamine in UHMWPE,the friction and wear of UHMWPE modified with 10 wt% 1,6-diamine Schiff base Cu(Ⅱ) complex was minimum;the wear mode was abrasive wear,and selective transferring effect of Cu from Schiff base copper complex additive occured.