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首页> 外文期刊>Journal of Polymers and the Environment >A Novel and Formaldehyde-Free Preparation Method for Lignin Amine and Its Enhancement for Soy Protein Adhesive
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A Novel and Formaldehyde-Free Preparation Method for Lignin Amine and Its Enhancement for Soy Protein Adhesive

机译：木质素胺的新型无甲醛制备方法及其对大豆蛋白胶粘剂的增强作用

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摘要

In this work, a novel two-step process to prepare primary lignin amine was developed. The lignin used in this study was obtained from the residue of cellulosic sugar fermentation for bioethanol (referred as "lignin"). The lignin was initially oxidized through Fenton oxidation. The oxidized lignin was further converted to lignin amine by reductive amination. Ammonia was used in the second step leading to give the highly active primary lignin amine. The oxidation and reduction exhibited relatively high yields of 80.0 and 91.2 % respectively. For comparison, lignin was partially depolymerized via mild hydrogenolysis and then the partial depolymerized lignin was also converted to lignin amine using the same method. The obtained lignin amines were characterized in detail using elemental analysis, proton nuclear magnetic resonance (H-1 NMR), and Fourier transform infrared spectroscopy (FTIR). Further, modification of soy protein adhesive by lignin amine was exemplified in wood bonding, and the results indicated that addition of lignin amine greatly increased water resistance of soy protein adhesives.
机译：在这项工作中，开发了一种新的两步法制备伯木质素胺。这项研究中使用的木质素是从纤维素糖发酵中用于生物乙醇的残留物中获得的（称为“木质素”）。木质素最初通过Fenton氧化被氧化。通过还原胺化将氧化的木质素进一步转化为木质素胺。在第二步中使用氨，得到高活性的伯木质素胺。氧化和还原分别显示出相对较高的产率，分别为80.0％和91.2％。为了进行比较，木质素通过温和的氢解而部分解聚，然后也使用相同的方法将部分解聚的木质素转化为木质素胺。使用元素分析，质子核磁共振（H-1 NMR）和傅里叶变换红外光谱（FTIR）对获得的木质素胺进行详细表征。此外，在木质结合中例举了通过木质素胺对大豆蛋白粘合剂的改性，结果表明，添加木质素胺大大提高了大豆蛋白粘合剂的耐水性。

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