常压等离子体改善高性能纤维粘结性的研究

以氦气为载气,氧气为反应气体,对高强度聚乙烯和Twaron 1000芳纶两种高性能纤维进行常压等离子体处理,来改善纤维的粘结性能;采用单纤维抽拔实验测定等离子体处理前后纤维与环氧树脂之间的界面剪切力;利用原子力显微镜和X射线光电子能谱仪分析等离子体处理前后纤维表面形态和化学成分的变化。结果表明:高强度聚乙烯纤维和芳纶经常压等离子体处理后,纤维表面粗糙度增加,纤维表面碳元素含量下降,羟基、羧基等含氧或氮的极性基团增加,纤维粘结性能得到提高,但其强度无明显变化。

Improvement of adhesion property of high-performance fiber by atmospheric pressure plasma treatment

Two kinds of high-performance fibers,high-strength polyethylene fiber and Twaron 1000 aramide fiber,were subjected to the atmospheric pressure plasma treatment using helium as carrier gas and oxygen as reactive gas in order to improve the adhesion property of the fibers.The interfacial shear strength of the fiber to epoxy resin was measured before and after plasma treatment by single fiber pulling out experiment.The change of the surface morphology and chemical compositions of the fiber were analyzed before and after plasma treatment with an atomic force microscope and an X-ray photoelectron spectrometer.The results showed that the surface roughness of the fiber was increased,the carbon element content on the fiber surface was decreased,the polar hydroxyl and carboxyl groups containing oxygen or nitrogen were increased,the adhesion property of the high-performance fibers was improved,but the strength had no obvious change when the high-strength polyethylene fiber and Twaron 1000 aramide fiber were subjected to atmospheric pressure plasma treatment.