碳纤维表面原位固相协同生长纳米碳管

摘要

在碳纤维(CF)表面直接原位生长碳纳米管(CNTs),可有效避免CNTs分散不均的问题,充分发挥二者的优势,对获得高层间性能的碳纤维增强树脂基复合材料(CNTs-CF/EP)具有重要的意义。本文对 CF进行表面改性处理,在CF表面负载催化剂粒子,然后通过原位生长法并在助催化剂噻吩的协同作用下,在CF表面固相生长了CNTs。此方法得到的 CNTs-CF,不仅有效避免 CNTs 在基体中的相互缠绕、难以分散等问题。而且由于生长CNTs 的碳源主要来自 CF,二者结合强度较高,对提高 CNTs-CF/EP 的层间性能非常有利。借助于 SEM、XRD及 FT-IR等分析测试手段,研究了催化剂Ni(NO3)2·6 H2 O浓度对表面长有CNTs的CF的形貌、结构及其性能的影响。结果表明：在适当的催化剂浓度(0.2 mol·L-1)负载中,CF表面能够生长出结合牢固、垂直生长且均匀分布的CNTs,但力学性能有所下降。%The in-situ growth of carbon nanotubes (CNTs)on the carbon fiber can effectively avoid the uneven dis-tribution of CNTs and exploit the advantages of carbon fiber and carbon nanotubes to the full,which play an impor-tant role in enhancing the interfaceproperties of the carbon fiber reinforcedpolymer (CF/EP).The surface of carbon fiber were modified and loaded with catalysts,and then the multy-walled carbon nanotubes (CNTs)were in-situ sol-id phase grown on the surface of carbon fiber with the assistance of thiophene.The carbon fiber obtained by this method can not only avoid the entanglement and uneven distribution of the CNTs in CNTs-CF/EP,but also enhance the interlaminar properties of CNTs-CF/EP due to the carbon source of synthesized CNTs mainly from the treated carbon fiber with the high surface bonding strength between the carbon fiber and the CNTs.The effects of the cata-lyst concentrations on the morphologies of growth CNTs and the performances of carbon fiber were investigated by SEM,XRD,FT-IR and other measurements.The results show that the synthesized CNTs can uniformly distribute and firmly bond on the surface of carbon fiber with the proper catalyst concentration of 0.2 mol·L-1 .The mechan-ical properties of the carbon fiber decrease a little.