Preparation and performance study of CTBN/nano-SiC composite toughened Xanthoceras sorbifolia oil-based adhesive

Adhesives used in traditional plywood predominantly rely on petroleum-based materials, which pose issues of formaldehyde emission and present challenges in balancing the toughness and rigidity of the plywood. In this study, a base resin system was constructed using Xanthoceras sorbifolia oil as the raw material, by blending acrylated epoxidized Xanthoceras sorbifolia oil (AEXO) with Xanthoceras sorbifolia oil dimethacrylate (MXOEA), followed by crosslinking with 2-isocyanatoethyl methacrylate (IEM). Carboxyl-terminated butadiene-acrylonitrile rubber (CTBN) and nano-silicon carbide (SiC) were introduced for composite toughening, and the effects of their contents on the properties of the adhesive and the resulting plywood were investigated. The results indicated that the optimal formulation was achieved with 15% CTBN and 0.1% SiC: the impact strength of the adhesive increased by 142.7% compared with that of the unmodified system. The plywood prepared with this adhesive met the key mechanical and water-resistance requirements for high-performance wood-based composites; further processing it into table tennis blades verified the practical application potential of this adhesive. This study provides a green alternative to petroleum-based adhesives in the fields of plywood and wood-based sporting equipment.