等离子体处理碳纤维/树脂复合材料

Carbon fiber/resin composites treated by plasma

为了提高碳纤维/树脂复合材料的表面浸润性,采用等离子体直接对复合材料进行表面处理,通过接触角测试、拉伸试验、金相显微分析和红外光谱分析,探究了等离子体处理碳纤维/树脂复合材料的最佳处理工艺、处理前后碳纤维/树脂复合材料的力学性能和表面官能团的变化。结果显示:电流、气压和处理时间均对碳纤维/树脂复合材料表面浸润性有明显影响,当电流为1.0A、气压为1.0Pa、处理时间为10min时,表面浸润性最佳;处理后碳纤维/树脂复合材料的拉伸强度没有减小,反而提高了8%。红外光谱分析显示处理后碳纤维/树脂复合材料表面酯基链发生断裂,酯基数量降低,相应形成更多的酮基、羧基和醇羟基,表面极性增强,浸润性显著提高。研究解决了碳纤维/树脂复合材料表面呈惰性的问题,为其表面功能涂层制备奠定了基础。

In order to improve the surface wettability of carbon fiber/resin composites,the surfaces of composites were treated by plasma directly.By means of contact angle measurement,tensile test,metallographic microscopic analysis and infrared spectruma nalysis,the best treating technology of carbon fiber/resin composites treated by plasma,mechanical properties and surface functional group changes of carbon fiber/resin composites before and after treatment were investigated.The results indicate that the current,pressure and treating time all have significant influence on the surface wettability of carbon fiber/resin composites,when current is 1.0A,pressure is 1.0Pa and treating time is 10 min,the surface wettability is optimal.The tensile strength of carbon fiber/resin composites does not decrease after treatment,while goes up of 8%.Infrared spectrum analysis shows that the ester group chain on treated carbon fiber/resin composite surface breaks and the quantity of eater group decreases.Accordingly,more ketone group,carboxyl group and alcoholic hydroxyl group are formed.The surface polarity is enhanced and wettability is improved significantly.The research solves the problem that the carbon fiber/resin composite surface is unreactiveness,and establishes the foundation for the surface function coating preparation.