Soybean meal-based wood adhesive enhanced by ethylene glycol diglycidyl ether and diethylenetriamine
Soybean meal-based wood adhesive enhanced by ethylene glycol diglycidyl ether and diethylenetriamine
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DOI：
10.1016/j.indcrop.2015.05.066
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发表时间：
2015-11-15
影响因子：
5.9
通讯作者：
Li, Jianzhang
中科院分区：
文献类型：
--
作者：
Li, Jingjing;Luo, Jing;Li, Jianzhang
本研究的目的是通过乙二醇二缩水甘油醚 (EGDE) 和二乙烯三胺 (DETA) 提高豆粕基粘合剂的性能。制造三层胶合板来测量湿剪切强度。详细表征了所得粘合剂的官能团、横截面、结晶度、热行为和物理性能。结果表明，DETA与EGDE反应形成带有环氧基团的长链结构，使大豆蛋白分子交联，形成更致密的固化胶层，从而提高所得胶粘剂的耐水性。此外，长链结构与大豆蛋白分子形成互穿网络，进一步提高了胶粘剂的耐水性。掺入EGDE/DETA后，所得胶粘剂粘合的胶合板的湿剪切强度提高了30.7%，达到1.15 MPa，满足室内使用胶合板的要求。此外，与豆粕基对照粘合剂相比，固化粘合剂的粘度降低了39.4-50.3%，这使得所得粘合剂可用于胶合板工业应用。 (C) 2015 Elsevier B.V. 保留所有权利。
The objective of this study was to improve performance of the soybean meal-based adhesive by an ethylene glycol diglycidyl ether (EGDE) and diethylenetriamine (DETA). Three-ply plywood was fabricated to measure wet shear strength. The functional groups, cross section, crystallinity, thermal behavior, and physical properties of the resultant adhesives were characterized in detail. Results show that DETA reacted with EGDE to form a long chain structure with epoxy groups, which cross-linked the soy protein molecules to form a denser cured adhesive layer to improve the water resistance of the resultant adhesive. In addition, the long chain structure formed an interpenetrating network with the soy protein molecules, which further improved the water resistance of the adhesive. Incorporating EGDE/DETA, the wet shear strength of the plywood bonded by the resultant adhesive was improved by 30.7% to 1.15 MPa, which met the interior use plywood requirement. Additionally, compared with the soybean meal-based control adhesives, the viscosity of the cured adhesive decreased by 39.4-50.3%, that made the resultant adhesive practical for plywood industrial application. (C) 2015 Elsevier B.V. All rights reserved.