电化学处理对碳纤维表面加载碳纳米管的影响机理

利用电化学阳极氧化法改性碳纤维表面,开发了在连续碳纤维表面简单、高效、均匀地加载催化剂涂层的工艺。通过系统研究电化学改性强度对碳纤维表面物理与化学特性、催化剂颗粒与CNTs形貌、多尺度增强体拉伸强度及其增强复合材料层间剪切强度的影响,优化了碳纤维表面电化学改性工艺。结果表明:催化剂颗粒的形貌与分布不仅影响碳纤维表面沉积的CNTs的形貌,而且影响最终碳纤维表面生长CNTs多尺度增强体及其复合材料的力学性能。

Influencing Mechanism of Electrochemical Treatment on Preparation of CNTs-grafted on Carbon Fibers

Based on electrochemical anodic oxidation,an innovative technique was developed to efficiently obtain the uniform catalyst coating on continuous carbon fibers.Through systematic investigation on the effect of electrochemical modified strength on the physical and chemical characteristics of carbon fiber surface,catalyst particles and the morphology of CNTs-grafted carbon fibers,tensile strength of multi-scale reinforcement and the interlaminar shear strength of its reinforced composites,the electrochemical modification process on carbon fibre surface was optimized.The results show that the morphology and distribution of catalyst particles not only affect the morphology of CNTs deposited on the surface of carbon fibres,but also affect the mechanical properties of multi-scale reinforcement and its reinforced composites of CNTs-grafted carbon fibers.