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The Crosslinking Mechanism of camellia oleifera protein Adhesive with Amine Resins by ^(13)C-NMR and ESI-MS

Journal of Wuhan University of Technology(Materials Science) 2023年第2期38卷 460-466页

作者： DENG Xue ZHANG Bengang LIANG Jiankun LI Lifen WU Zhigang LEI Hong College of Forestry Guizhou UniversityGuiyang550025China Yunnan Provincial Key Laboratory of Wood Adhesives and Glued Products Southwest Forestry UniversityKunming650224China College of Civil Engineering Kaili UniversityQiandongnan556011China

A new protein wood adhesive was studied with camellia oleifera *** and N-(2)-L-Ala-L-Gln(LAG)were used as the model compounds of amino resins and camellia oleifera protein,aiming to provide scientific foundations for the improvement and applications of camellia oleifera protein adhesive by the reaction of model *** experimental results demonstrate that,under alkaline conditions,formaldehyde is easier to react with camellia oleifera protein by quicker reaction and lower curing *** acid conditions,amino hydroxymethylated structure of aliphatic series from LAG is difficult to form stable reactive intermediates and further *** of end acylamino and peptide bond amino from LAG is relatively *** alkaline conditions,the free aliphatic amino and acylamino of LAG both can make hydroxymethylation reaction with *** the polycondensation,hydroxymethyl amide is the initial structure and the reactive intermediate is produced by E1cb reaction of hydroxymethyl *** bridge bonds and methylene ether bonds are structures of the polycondensation products,which are competing *** former is mainly formed by the reaction between alkaline reactive intermediate and amino of aliphatic series,and the latter is produced by the reaction of reactive intermediate and amino of hydroxymethyl aliphatic series with hydroxymethyl amide.

关键词： camellia oleifera protein wood adhesive ESI-MS NMR

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Study on camellia oleifera protein based Wood Adhesive by Epoxy Resin and Its Crosslinking Mechanism

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Journal of Wuhan University of Technology(Materials Science) 2021年第4期36卷 607-613页

作者： CHEN Sicheng LIANG Jiankun ZHANG Bengang WU Zhigang LEI Hong LI Lifen YANG Shoulu College of Forestry Guizhou UniversityGuiyang 550025China School of Architectural Engineering Kaili UniversityQiandongnan 556011China Yunnan Provincial Key Laboratory of Wood Adhesives and Glued Products Southwest Forestry UniversityKunming 650224China Guizhou Academy of Forestry Guiyang 550005China

Epoxy resin (EPR) was used to crosslink with camellia oleifera *** to prepare wood adhesive,and the bonding performance and curing characteristics of which were mainly investigated,and the synthesis mechanism was also discussed by using model *** experimental results show that EPR can significantly improve the bonding performance of camellia oleifera ***-based adhesive,and the maximum of which reaches 0.72 MPa satisfies the strength requirement of Type II plywood in GB/T *** alkali treatment,the protein can more easily crosslink with EPR at low curing temperature,and the adhesive has high degree of crystallinity of curing products,high degree of crosslinking reaction,and high bonding *** reaction mechanism of EPR-modified camellia oleifera *** adhesive can be divided into resinification phase and curing phase.

关键词： camellia oleifera protein epoxy resin crosslinking wood adhesive

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