Effect of Carbon Nanofiber-Matrix Adhesion on Polymeric Nanocomposite Properties—Part II

[摘要] A successful integration of two independent phases with good adhesion is imperative foreffective translation of superior carbon nanofiber filler properties into a physically superiorcarbon nanocomposite. Carbon nanofibers were subjected to electrochemical oxidation in 0.1 Mnitric acid for varying times. The strength of adhesion between the nanofiber and an epoxy matrixwas characterized by flexural strength and modulus. The surface functional groupsformed and their concentration of nanofibers showed a dependence on the degree of oxidation.The addition of chemical functional groups on the nanofiber surface allows them to physicallyand chemically adhere to the continuous resin matrix. The chemical interaction with thecontinuous epoxy matrix results in the creation of an interphase region. The ability to chemicallyand physically interact with the epoxy region is beneficial to the mechanical properties of acarbon nanocomposite. A tailored degree of surface functionalization was found to increaseadhesion to the matrix and increase flexural modulus.

[学科分类] 材料工程