Modification of novel bio-based adhesive made from citric acid and sucrose by ZnCl2

Due to environmental and health concerns, a substitute for conventional wood adhesives has been sought, with bio-based being one of the most-researched alternatives. Recently, adhesive made from citric acid sucrose was used manufacture sweet sorghum bagasse particleboard. However, pressing conditions (200 °C, 10 min) consume high amount energy, so optimization condition is required. Therefore, effects ZnCl2 as catalyst curing reaction acid-sucrose were investigated. Thermal analyses such differential scanning calorimetry (DSC) thermal gravimetric analysis (TGA) well Fourier transform-infrared (FT-IR) spectroscopy insoluble matter investigate effect on behaviour adhesive. DSC TGA showed that decreased temperature, enthalpy reaction, apparent activation energy. The energy obtained using Kissinger method 123.7 kJ/mol 108.7 after 1% added. level in cured 4 h boiling treatment at 150 180 200 °C various heating times (6 higher addition ZnCl2. FT-IR could accelerate degradation sucrose, formation 5-hydroxymethylfurfural, polymeric humins.