不同种类等离子处理对超高分子量聚乙烯表面能的影响

Effect of Different Plasma Treatment on the Surface Energy of UHMWPE

以表面能为评价指标,研究不同种类等离子(氢、氧、氩)处理对超高分子量聚乙烯(UHMWPE)的活化作用。研究结果表明,UHMWPE经氧等离子处理后表面能增幅最大,经氩离子处理表面能增幅次之,而经氢离子处理表面能不仅没有增加,反而还有所下降。光电子能谱(XPS)和红外光谱(FT-IR)分析表明,氧和氩等离子处理后UHMWPE表面有含氧极性基团的引入;而氢等离子处理后表面不仅没有含氧基团的引入,反而有憎水基团(反式乙烯基)的生成。正是这些极性或憎水基团的引入导致UHMWPE表面能发生变化。

The influence of different plasma（H,O and Ar） treatment on the surface energy of ultra-high molecular weight polyethylene（UHMWPE） has been investigated.The results indicate that the surface energy of UHMWPE increases most after oxygen plasma processing,and that increases second most after argon plasma processing, however it decreases a little after hydrogen plasma processing.X-ray photoelectron spectroscopy（XPS） and Fourier transform infrared spectrum（FT-IR） results show that the increase in surface energy of UHMWPE treated by oxygen or argon plasma is attributed to the introduction of oxygen containing groups,and the decrease in surface energy of UHMWPE treated by hydrogen plasma should be attributed to the introduction of hydrophobic groups（trans vinylene）.