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

由于对环境和健康的关注，一直在寻求替代传统的木材粘合剂，生物基粘合剂是研究最多的替代品之一。近来，由柠檬酸和蔗糖制成的生物基粘合剂被用于制造甜高粱甘蔗渣刨花板。但是，加压条件（200℃，10分钟）消耗大量能量，因此需要优化加压条件。因此，ZnCl ₂的作用研究了柠檬酸-蔗糖胶粘剂作为固化反应的催化剂。热分析如差示扫描量热法（DSC）和热重分析（TGA）以及傅立叶变换红外（FT-IR）光谱和不溶物分析用于研究催化剂对柠檬酸固化行为的影响酸性蔗糖胶。DSC和TGA表明，ZnCl ₂降低了固化温度，焓反应和表观活化能。使用1％ZnCl ₂后，使用Kissinger方法获得的表观活化能从123.7 kJ / mol降至108.7 kJ / mol加入催化剂。加入1％ZnCl ₂后，在150°C，180°C和200°C的加热时间（分别为6和10分钟）下煮沸4 h后，固化的粘合剂中的不溶物含量更高。固化后的胶粘剂的FT-IR分析表明，ZnCl ₂可以促进蔗糖的热降解，5-羟甲基糠醛的形成以及聚合物腐殖质的形成。