Plant Polyphenol-Inspired Crosslinking Strategy toward High Bonding Strength and Mildew Resistance for Soy Protein Adhesives,Macromolecular Materials and Engineering

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Plant Polyphenol-Inspired Crosslinking Strategy toward High Bonding Strength and Mildew Resistance for Soy Protein Adhesives
Macromolecular Materials and Engineering ( IF 4.2 ) Pub Date : 2021-08-25 , DOI: 10.1002/mame.202100543
Chao Ma ₁ , Huiwen Pang ₁ , Yulin Shen ₁ , Zhenxuan Liang ₁ , Jianzhang Li ₁ , Shifeng Zhang ₁ , Junyou Shi ₂

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Soybean protein adhesives are environmentally friendly biomass-based aldehyde-free adhesives that have good economic value for the wood industry; however, it remains challenging to produce soybean protein adhesives with excellent water resistance, toughness, and mildew resistance through a simple modification method. In this work, inspired by plant polyphenols, a novel crosslinked soybean meal adhesive (SMPT) is obtained using a facile economic method. Polyamidoamine-epichlorohydrin (PAE) and tannic acid (TA) are combined with a soybean meal matrix to form a tough co-crosslinked network through strong intermolecular forces (covalent bonds, ionic bonds, and hydrogen bonds) in adhesive system. The results show that the wet bonding strength of SMPT adhesives for plywood is 134.1% higher than the unmodified soybean meal adhesive. The adhesion properties met the standard requirements for interior-use plywood. And the compact cross-linking network structure is accelerated the greater energy dissipation, which improves the toughness of adhesive. Moreover, cationic azetidinium groups in PAE and phenol hydroxyl groups in TA synergistically not only exhibit the good antibacterial activities but also improve mildew resistance for SMPT adhesives. This facile strategy provides an economic sustainable method to prepare high-performance environmentally friendly wood adhesives.

中文翻译：

植物多酚启发的交联策略实现大豆蛋白粘合剂的高粘合强度和抗霉性

大豆蛋白胶粘剂是一种环保型生物质基无醛胶粘剂，对木材工业具有良好的经济价值；然而，通过简单的改性方法生产具有优异耐水性、韧性和防霉性的大豆蛋白粘合剂仍然具有挑战性。在这项工作中，受植物多酚的启发，使用简便经济的方法获得了一种新型交联豆粕粘合剂 (SMPT)。聚酰胺胺-表氯醇（PAE）和鞣酸（TA）与豆粕基质结合，通过粘合剂体系中强大的分子间作用力（共价键、离子键和氢键）形成坚韧的共交联网络。结果表明，SMPT胶粘剂对胶合板的湿粘合强度比未改性豆粕胶粘剂高134.1%。粘合性能满足室内用胶合板的标准要求。并且紧密的交联网络结构加速了更大的能量耗散，从而提高了粘合剂的韧性。此外，PAE 中的阳离子氮杂环丁烷基团和 TA 中的酚羟基协同作用，不仅表现出良好的抗菌活性，而且还提高了 SMPT 粘合剂的抗霉性。这种简便的策略为制备高性能环保木材粘合剂提供了一种经济可持续的方法。PAE 中的阳离子氮杂环丁烷基和 TA 中的酚羟基协同作用，不仅表现出良好的抗菌活性，而且还提高了 SMPT 粘合剂的抗霉性。这种简便的策略为制备高性能环保木材粘合剂提供了一种经济可持续的方法。PAE 中的阳离子氮杂环丁烷基和 TA 中的酚羟基协同作用，不仅表现出良好的抗菌活性，而且还提高了 SMPT 粘合剂的抗霉性。这种简便的策略为制备高性能环保木材粘合剂提供了一种经济可持续的方法。

更新日期：2021-08-25

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