Luo Jing, Zhou Ying, Zhang Yi, Gao Qiang, Li Jianzhang
Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Materials Science and Engineering, Nanjing Forestry University, Longpan Road 159, Xuanwu District, Nanjing 210037, China.
Ministry of Education Key Laboratory of Wooden Material Science and Application, Beijing Key Laboratory of Wood Science and Engineering, College of Materials Science and Technology, Beijing Forestry University, Beijing 100083, China.
Polymers (Basel). 2020 Apr 20;12(4):954. doi: 10.3390/polym12040954.
Soybean meal-based adhesive is a good wood adhesive mainly due to its renewable, degradable, and environmentally friendly features. To improve the enhancement efficiency for adhesives, diglycidyl resorcinol ether (DRE) containing a benzene ring and flexible chain structure was used as an efficient cross-linker to enhance the adhesive in the study. The physicochemical properties of adhesives, the dry shear strength, and wet shear strength of plywood were measured. Results suggested that DRE reacted with the functional groups of soybean meal adhesive and formed a cross-linking network during hot press process in a ring-opening reaction through a covalent bond. As expected, compared to adhesive control, the soybean meal adhesive with 4 wt% DRE incorporation showed a significant increment in wet shear strength by 227.8% and in dry shear strength by 82.7%. In short, soybean meal adhesive enhanced with DRE showed considerable potential as a wood adhesive for industrial applications.
豆粕基胶粘剂是一种优良的木材胶粘剂，主要因其具有可再生、可降解和环保的特性。为提高胶粘剂的增强效率，本研究中使用含有苯环和柔性链结构的间苯二酚二缩水甘油醚（DRE）作为高效交联剂来增强该胶粘剂。测定了胶粘剂的物理化学性质、胶合板的干剪切强度和湿剪切强度。结果表明，DRE与豆粕胶粘剂的官能团发生反应，并在热压过程中通过开环反应以共价键形成交联网络。正如预期的那样，与对照胶粘剂相比，掺入4 wt% DRE的豆粕胶粘剂的湿剪切强度显著提高了227.8%，干剪切强度提高了82.7%。简而言之，用DRE增强的豆粕胶粘剂作为工业应用的木材胶粘剂显示出相当大的潜力。
