Enhancing Interfacial Locking of the Cf and Pbpesk Resin by In-Situ Electrochemical Deposition of Mof Nanoparticles

Abstract

The interfacial bonding of carbon fiber reinforced polymer composites plays a critical role in the overall performance of the composites. Poor interfacial bonding leads to catastrophic damage of composites when subjected to external loads. In this study, three-dimensional (3D) NH2-UiO-66 nanoparticles in situ synthesis on the carbon fiber (CF) surface using an electrochemical method was achieved facilely and efficiently to enhance the interfacial adhesion of CF/PBPESK composites. The influence of incorporating 3D NH2-UiO-66 nanoparticles into the interphase on the interfacial and mechanical properties of carbon fiber reinforced composites was systematically investigated. The NH2-UiO-66 nanoparticles significantly increased the carbon fibers surface energy. The flexural, interlaminar shear and interfacial shear strength of the N-CF-6min/PBPESK composites were improved by 19%, 31%, and 93%, respectively, compared to the D-CF/PBPESK composites. Furthermore, the interfacial failure mechanism of the composites was investigated. This approach offered a simple and efficient strategy for the in-situ growth of interfacial phase characterized by robust mechanical locking effects.

Keywords: carbon fibers, polymer composites, interfacial properties, surface modification