论文部分内容阅读
通过硝酸氧化和超声处理相结合的方法,对碳纤维表面进行了成功改性。研究了改性处理温度、超声时间等对碳纤维的微结构、相结构、化学结构以及表面元素含量等的影响。结果表明:随着硝酸-超声处理温度的升高和处理时间的延长,碳纤维的结晶度提高、表面变得更加粗糙,而碳纤维表面的含氧官能团数量、活性基团含量逐渐增加,从而使得碳纤维与环氧树脂间的浸润性、反应性、机械锚合作用和结合力增大,最终使改性碳纤维增强的复合材料的力学性能得以显著提高,其中拉伸强度和弯曲强度分别提高了约12%和46.2%。
Through the combination of nitric acid oxidation and ultrasonic treatment, the carbon fiber surface was successfully modified. The effects of modification temperature and ultrasonic time on the microstructure, phase structure, chemical structure and surface element content of carbon fiber were studied. The results showed that with the increase of nitric acid-ultrasonic temperature and the prolongation of treatment time, the crystallinity of carbon fiber increased and the surface roughened. The number of oxygen-containing functional groups and active groups on the surface of carbon fiber increased gradually, With the epoxy resin between the infiltration, reactivity, mechanical anchoring and binding increased, the final modified carbon fiber reinforced composite material mechanical properties can be significantly improved, wherein the tensile strength and flexural strength were increased by about 12 % And 46.2%.