摘要
本文通过采用去离子水超声、浓硝酸浸泡和浓硝酸超声等多种技术对碳纤维进行了表面处理,深入探讨了这些处理对碳纤维的微观结构、表面化学组成、相结构、复丝拉伸强度,以及改性碳纤维增强环氧树脂复合材料在结构和力学性能方面的影响。在改性碳纤维与树脂基体之间的界面,硝酸氧化和超声处理的协同效应十分显著。在改性碳纤维与树脂基体的交界面上,硝酸氧化与超声波处理展现出了非常明显的协同作用。研究发现,硝酸氧化和超声波处理对碳纤维的表面产生了显著的改善效果。硝酸处理导致碳纤维表面的粗糙度和含氧官能团的数量大幅上升,而超声波处理则使碳纤维展现出更好的分散性,同时也增加了碳纤维的比表面积和含氧官能团。在表面处理的基础上,通过进一步的界面设计,成功地实现了碳纤维与树脂基体之间更紧密的结合。
In this paper, the surface treatment of carbon fiber was carried out by deionized water ultrasound, concentrated nitric acid immersion and concentrated nitric acid ultrasound, and the effects of these treatments on the microstructure, surface chemical composition, phase structure and tensile strength of carbon fiber, as well as the structure and mechanical properties of modified carbon fiber reinforced epoxy resin composite materials, were discussed. At the interface between the modified carbon fiber and the resin matrix, the synergistic effect of nitric acid oxidation and ultrasonic treatment is very significant. At the interface of modified carbon fiber and resin matrix, nitric acid oxidation and ultra-sonic treatment showed a very obvious synergistic effect. It is found that nitric acid oxidation and ultrasonic treatment have a significant improvement effect on the surface of carbon fiber. Nitric acid treatment led to a significant increase in the surface roughness and the number of oxy-gen-containing functional groups of carbon fiber, while ultrasonic treatment made carbon fiber show better dispersion, but also increased the specific surface area and oxygen-containing functional groups of carbon fiber. On the basis of surface treatment, through further interface design, a closer bond between carbon fiber and resin matrix is successfully achieved.
出处
《材料科学》
2024年第3期229-238,共10页
Material Sciences
