Abstract Polyelectrolyte complexes composed of lignosulfonate and cationic polyelectrolytes were used as bio-based adhesives. Sodium lignosulfonate (L-SO3Na), a wood-derived anionic polyelectrolyte, was combined with three different cationic polyelectrolytes and the adhesive strength of the resulting complexes was evaluated on various substrates. Higher adhesive strength was observed with polar substrates (stainless steel, aluminum, and wood) compared to a nonpolar substrate (polypropylene). Complexes L-SO3Na/poly(allylamine) and L-SO3Na/ε-poly-l-lysine exhibited higher adhesive strength than the other polyelectrolyte complexes on aluminum and a commercial polyvinyl acetate adhesive on wood. In addition, our adhesives do not require any additional chemical reagents, such as organic solvents, crosslinkers, or condensation agents. The L-SO3Na/ε-poly-l-lysine complex is a strong and completely biodegradable adhesive. This study demonstrates the use of lignosulfonate in the development of low-toxicity, sustainable, and biodegradable adhesives with excellent adhesive strength.

中文翻译：

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一种由木质素磺酸盐和阳离子聚电解质的聚电解质复合物组成的生物基粘合剂

摘要 由木质素磺酸盐和阳离子聚电解质组成的聚电解质复合物被用作生物基粘合剂。木质素磺酸钠 (L-SO3Na) 是一种木材衍生的阴离子聚电解质，与三种不同的阳离子聚电解质结合，并在各种基材上评估所得复合物的粘合强度。与非极性基材（聚丙烯）相比，极性基材（不锈钢、铝和木材）的粘合强度更高。复合物 L-SO3Na/聚（烯丙胺）和 L-SO3Na/ε-聚-l-赖氨酸的粘合强度高于铝上的其他聚电解质复合物和木材上的商用聚醋酸乙烯酯粘合剂。此外，我们的粘合剂不需要任何额外的化学试剂，如有机溶剂、交联剂或缩合剂。L-SO3Na/ε-聚-l-赖氨酸复合物是一种强力且完全可生物降解的粘合剂。这项研究证明了木质素磺酸盐在开发具有优异粘合强度的低毒、可持续和可生物降解的粘合剂中的应用。