A Composite Whole-Biomass Tannin–Sucrose–Soy Protein Wood Adhesive with High Performance

Whole-biomass adhesives are the research hotspot of wood andcan improve competitiveness adhesives. The tannin–sucrose adhesive studied by our group shows good bonding performance, but poor stability induced low viscosity. In this study, was modified isolated soybean protein (SPI), effect SPI substitution ratio for tannin on properties tannin–sucrose–SPI composite investigated, and mechanism explored using Fourier-transform infrared spectroscopy (FT-IR), thermogravimetry (TG), X-ray diffraction (XRD), gas chromatography–mass (GC–MS). results showed that: (1) when above 40%, viscosity increased significantly, which effectively avoided leakage. (2) displayed high performance water resistance. (3) FTIR GC–MS revealed that curing very complicated, it certain conversion sucrose into furan compounds, especially 5-hydroxymethylfurfural (5-HMF), core cross-linking reaction elevating temperature. (4) macromolecules reactivity compensated shortage temperature required furanic cross-linkers so experienced an efficient at a temperature, degree thermal product increased.