Study on the Soy Protein-Based Adhesive Cross-Linked by Glyoxal  

作　　者：Zhigang Wu Jiankun Liang Hong Lei Bengang Zhang Xuedong Xi Lifen Li 

机构地区：[1]Yunnan Provincial Key Laboratory of Wood Adhesives and Glued Products,Southwest Forestry University,Kunming,650224,China [2]College of Forestry,Guizhou University,Guiyang,550025,China [3]Kaili University,Qiandongnan,556011,China

出　　处：《Journal of Renewable Materials》2021年第2期205-218,共14页可再生材料杂志（英文）

基　　金：This work was supported by Science-technology Support Foundation of Guizhou Province of China(Nos.[2019]2325 and [2020]1Y125);the Growth Project of Young Scientific and Technological Talents in Colleges and Universities of Guizhou Province(No.[2019]184);Yunnan Fundamental Research Key Projects(No.2019FA012);National Natural Science Foundation of China(Nos.31870546 and 31800481).

摘　　要：Based on the ESI-MS and ^(13)C-NMR analysis of the forms of glyoxal in acidic and alkaline solutions,the soy-based adhesive cross-linked by glyoxal was prepared in this work.The results showed that glyoxal existed in water in different forms at different pH levels.Under alkaline conditions,glyoxal transformed to glycolate through the intramolecular disproportionation reaction.Under acidic conditions,although some of glyoxal transformed to glycolate as what happened under alkaline conditions,most of glyoxal molecules existed in the form of fiveor six-membered cyclic ether structure.No ethylene tetraol or free aldehyde group was actually detected under these conditions.Although glyoxal reacted with soy protein under both acidic and alkaline conditions,alkaline conditions were more favorable for the improvement of mechanical performance and water resistance of soybased adhesives than acid conditions.

关 键 词：GLYOXAL soy protein-based adhesive CROSS-LINK 

分 类 号：O62[理学—有机化学]