低温等离子体表面处理技术研究

Research on Low-Temperature Plasma Surface Treatment Technology

为了提高轻质材料的表面活性,采用低温等离子体技术,分别对铝合金、碳纤维复合材料进行表面改性处理。对2种材料表面的接触角、表面能、表面显微形貌与表面氧元素含量等理化性能进行分析,且对材料处理后的粘接强度进行测试。结果表明,低温等离子体处理后,材料的表面水接触角明显减小,表面能增加,且材料表面氧元素含量与含氧官能团数量明显增加,碳纤维复合材料表面显微形貌发生改变。经低温等离子体处理后,铝合金的拉剪强度提高了37.5%,复合材料的拉剪强度提高了62.0%,表面能增加与表面活性基团增加是粘接强度提高的重要因素。

For improving the surface activity of lightweight materials,low-temperature plasma technology was used to modify the surface of aluminum alloy and carbon fiber composite materials.The physical and chemical properties such as contact angle,surface energy,surface micromorphology and surface oxygen content of the two materials were analyzed,and the bonding strength of the materials after treatment was tested.Results showed that after low-temperature plasma treatment,the surface water contact angle of the materials decreased significantly,and the surface energy increased,the oxygen element content and the number of oxygen-containing functional groups on the surface of the materials increased significantly,and the surface micromorphology of the carbon fiber composite material changed.After the low-temperature plasma treatment,the tensile-shear strength of aluminum alloy increased by 37.5%,and the tensile-shear strength of composite material increased by 62.1%.Furthermore,the increase of surface energy and surface active groups were the important factors for the improvement of bonding strength.