等离子体改性技术在碳纤维/PEK-C复合材料中的应用研究  

Study on the Application of Plasma Modification to Carbon Fiber/PEK-C Composites

作　　者：李伟[1] 姚树勇[1] 马克明[1] 陈平[1] 杨浩志 杨森[1] 

机构地区：[1]沈阳航空航天大学航空航天工程学部,辽宁省高性能聚合物基复合材料重点实验室,辽宁沈阳110136

出　　处：《高校化学工程学报》2014年第3期690-694,共5页Journal of Chemical Engineering of Chinese Universities

基　　金：航空科学基金项目(2011ZF54018);沈阳市科技计划项目(F11-264-1-18)

摘　　要：利用低温氧等离子体处理技术对碳纤维进行表面改性,采用X射线光电子能谱、原子力显微镜等手段对碳纤维的表面性质进行表征,考察了等离子体功率和处理时间对碳纤维/PEK-C树脂基复合材料的界面黏结性能和力学性能的影响。结果表明,等离子体处理能够增加碳纤维表面的活性含氧基团含量和粗糙度,复合材料的界面黏结性能得到明显改善。在应力作用下,复合材料的破坏模式由未处理的界面脱黏破坏转变为等离子体处理后树脂基体的破坏。碳纤维在200 W的等离子体功率下处理12.5 min时,复合材料的层间剪切强度(ILSS)和弯曲强度分别达到最大值94.12MPa和1316.76 MPa。Surface modification of carbon fibers was conducted using a cold oxygen plasma technique. The surface of the carbon fiber was analyzed by X-ray photoelectron spectroscopy and atomic force microscopy. The effects of plasma power and treating time duration on the interfacial bonding properties and the mechanical properties of carbon/PEK-C composites were studied. The results show that the content of oxygen-containing groups and the roughness of the fiber surface are improved by the plasma treatment. Moreover, the interfacial bonding properties of the composite are strengthened. The primary failure mode of the carbon fiber/PEK-C composite under applied stress shifts from interface failure to matrix fracture after oxygen plasma treatments. When the carbon fiber is treated for 12.5 min with a plasma power of 200 W, the ILSS （the interlaminar shearing strength） and flexural strength of the composite reach to their maximum values of 94.12 MPa and 1316.76 MPa, respectively.

关 键 词：含酚酞侧基的聚芳醚酮(PEK-C) 碳纤维 热塑性复合材料 等离子体改性 界面黏结 PHENOLPHTHALEIN POLYARYLETHERKETONE (PEK-C) 

分 类 号：TB332[一般工业技术—材料科学与工程]