等离子体处理对UHMWPE纤维性能的影响

Effect of plasma modification treatment on UHMWPE fiber properties

针对超高分子量聚乙烯纤维(UHMWPE)因纤维表面光滑,造成纤维与树脂基体间的界面黏结度低的缺点,采用等离子处理方法对UHMWPE纤维的表面进行改性。利用台式扫描电镜、红外光谱等探究改性前后UHMWPE纤维的性能,采用正交实验设计方法分析等离子处理纤维过程中影响纤维性能的因素,再利用纤维束抽拔法测试纤维束与树脂之间的黏结力。结果表明:采用等离子处理方法最佳处理时间为4 min、舱内的压强为5 Pa、处理的功率为110 W;改性处理后,纤维表面的活性基团明显增多;改性后纤维表面明显有刻蚀作用,纤维表面接触角下降28. 95%,纤维与树脂基体的黏结度提高约28. 35%。

The smooth surface of UHMWPE fiber results in the low interfacial adhesion between the fibers and resin matrix.For this disadvantage,plasma processing method was used for surface modification of UHMWPE fibers.The properties of UHMWPE fiber before and after the modification were investigated by SEM and infrared spectroscopy.The factors affecting the fiber properties during plasma treatment were analyzed by orthogonal experiment design method.Then,the adhesive force between the fiber bundle and the resin was measured by the fiber bundle pull-out method.The results showed that:the optimum treatment process is as below:treatment time 4 min,pressure 5 Pa.the power of treatment 110 W.After modification,the active groups on the fibers surface increased significantly;the surface roughness increased obviously;the contact angle of fiber surface decreased by 28.95%,and the adhesive force between fiber and resin matrix increased by about 28.35%.