Effect of urea concentration on properties of peanut protein isolate, arachin and conarachin-based adhesives during urea-epichlorohydrin modification

Data of RSOS-202227. Wet shear strength, Apparent viscosity, Solid content，SEM, FTIR and TGA results of  the PPI, arachin and conarachin-based adhesives. To lay theoretical basis for the preparation of peanut protein-based adhesives and promote the sustainable development of adhesive industry, properties of peanut protein isolate (PPI), arachin and conarachin-based adhesives modified by urea and epichlorohydrin (ECH) were investigated under different urea concentrations. When the urea concentration was 2 mol/L, the wet shear strength of the PPI-based adhesive was 1.24 MPa with the best water resistance. With the increase of urea concentration from 0 to 4 mol/L, the apparent viscosity of the PPI-based adhesive increased from 3.87 Pa·s to 136.80 Pa·s and the solid content increased from 18.11% to 31.11%. Compared with conarachin-based adhesive, the properties of arachin-based adhesive were improved more obviously during the combined modification. Scanning electron microscopy imag...