CAJ | 학술논문

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94.12 MPa和1316.76 MPa。
이용저온양등리자체처리기술대탄섬유진행표면개성，채용X 사선광전자능보、원자력현미경등수단대탄섬유적표면성질진행표정，고찰료등리자체공솔화처리시간대탄섬유/PEK-C수지기복합재료적계면점결성능화역학성능적영향。결과표명，등리자체처리능구증가탄섬유표면적활성함양기단함량화조조도，복합재료적계면점결성능득도명현개선。재응력작용하，복합재료적파배모식유미처리적계면탈점파배전변위등리자체처리후수지기체적파배。탄섬유재200 W적등리자체공솔하처리12.5 min시，복합재료적층간전절강도(ILSS)화만곡강도분별체도최대치94.12 MPa화1316.76 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.