A novel method of biomimetic surface modification was used for aramid fibres aiming to enhance the interface properties between epoxy resin and the modified aramid fibre. Inspired by the composition of adhesive proteins in mussels, a thin layer of poly(dopamine) (PDA) was self-polymerized onto the surface of the aramid fibre. The graphene oxide (GO) was then grafted on the surface of PDA-coated aramid fibres. The microstructure and chemical characteristics of the pristine and modified fibres were characterised using Scanning Electron Microscopy (SEM) and X-ray photoelectron spectroscopy (XPS), indicating successful grafting of GO on the PDA-coated aramid fibres. Single fibre tensile test and microbond test were carried out to evaluate the mechanical properties of the modified fibres. It was found that the fibre surface modification improved the interfacial shear strength by 210% and the fibre tensile strength was protected by GO-PDA coating.

一种新型的仿生表面改性方法被用于芳纶纤维，目的是增强环氧树脂和改性芳纶纤维之间的界面性能。受贻贝中黏着蛋白组成的启发，聚（多巴胺）（PDA）的薄层自动聚合到芳纶纤维的表面上。然后将氧化石墨烯（GO）接枝到涂有PDA的芳族聚酰胺纤维的表面上。使用扫描电子显微镜（SEM）和X射线光电子能谱（XPS）对原始和改性纤维的微观结构和化学特性进行了表征，表明GO成功地接枝了PDA包覆的芳纶纤维。进行单纤维拉伸试验和微粘结试验以评估改性纤维的机械性能。