Inspired by spider silk to prepare biomimetic high-performance bovine serum albumin adhesive to strengthen the interfacial and tribological performance of fabric composites

The interfacial adhesion between fibers and resin matrix is considered to be one of the pivotal elements in determining the comprehensive properties of fabric composites. After years of study and development, it is still challenging to find simple and effective approaches to interfacial modification. Here, with inspiration from the spider silk structure of nature, an efficient and green bionic system was investigated to fabricate a high-performance BSA adhesive through the introduction of chitosan and Ti₃C₂T_x nanosheets in bovine serum albumin. The Ti₃C₂T_x nanosheets act as β-sheet nanocrystals in the biomimetic spider silk structure contributing to the creation of a closely cross-linking adhesive system. The results indicate that the wettability and surface activity are significantly enhanced of fiber by the BSA adhesive modification, which efficiently increases the interfacial properties. In comparison with virgin fabric composites, the bonding and tensile strength of strengthened fabric composites increased by 82% and 46.2%. In addition, the strengthened fabric composites have excellent anti-wear performance, with a 62.6% reduction in the wear rate. This paper provides novel ideas for applying biomass adhesives in tribology.