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High-Performance Resin Formulations with Ozone-Pretreated Corn Cob Lignin and Lysine
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2024-09-13 , DOI: 10.1021/acssuschemeng.4c05369 Sandip Singh 1 , Thomas Binder 1 , Erik Hagberg 2 , Bala Subramaniam 1, 3
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2024-09-13 , DOI: 10.1021/acssuschemeng.4c05369 Sandip Singh 1 , Thomas Binder 1 , Erik Hagberg 2 , Bala Subramaniam 1, 3
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Nontoxic resins formulated with renewable components have been receiving increased attention as sustainable alternatives to petroleum-based resins. In this work, we demonstrate a new class of lignin-amino acid (LA) resins, formulated with nontoxic components that are abundant and can be renewably sourced from field leftovers (corn cobs) and lysine (from biobased sugars). NMR (1H, 31P, 13C–1H HSQC, 15N–1H HSQC, and 15N–1H HMBC), FTIR, thermogravimetric, gel permeation chromatography, and elemental analyses provide insights into the physicochemical properties of the resins, including the presence of LA linkages such as C–N cross-linking. The LA resin creates strong bonds between pieces of wood, metals (aluminum and stainless steel), and plastics. Internal bond strengths (IBSs) of balsa wood and medium density fiberboard specimens glued with LA resins, measured using an Instron instrument, were comparable to those bonded with commercial polyurethane and polyvinyl acetate resins. Resins prepared with ozone-pretreated lignin have significantly larger molar masses and display increased bond strengths with glued substrates as inferred from IBS measurements. This is attributed to the creation of reactive oxygen-based functionalities in the lignin upon ozone pretreatment. LA resins thus show promise as a feasible and sustainable alternative to petroleum-based resins.
中文翻译：
含有臭氧预处理的玉米芯木质素和赖氨酸的高性能树脂配方
由可再生成分配制而成的无毒树脂作为石油基树脂的可持续替代品越来越受到关注。在这项工作中，我们展示了一种新型木质素氨基酸（LA）树脂，其配方中含有丰富的无毒成分，并且可以从田间剩余物（玉米芯）和赖氨酸（来自生物基糖）中可再生地获取。 NMR（ 1 H、 31 P、 13 C– 1 H HSQC、 15 N– 1 H HSQC 和15 N– 1 H HMBC）、FTIR、热重分析、凝胶渗透色谱和元素分析可深入了解该物质的物理化学性质。树脂，包括 LA 连接的存在，例如 C-N 交联。 LA 树脂可在木材、金属（铝和不锈钢）和塑料之间形成牢固的粘合。使用 Instron 仪器测量的用 LA 树脂粘合的轻木和中密度纤维板样本的内部粘合强度 (IBS) 与用商业聚氨酯和聚醋酸乙烯酯树脂粘合的内部粘合强度 (IBS) 相当。根据 IBS 测量推断，用臭氧预处理的木质素制备的树脂具有明显更大的摩尔质量，并且与胶合基材的粘合强度更高。这归因于臭氧预处理后木质素中基于活性氧的官能团的产生。因此，LA 树脂有望成为石油基树脂的可行且可持续的替代品。
更新日期：2024-09-13
中文翻译：
含有臭氧预处理的玉米芯木质素和赖氨酸的高性能树脂配方
由可再生成分配制而成的无毒树脂作为石油基树脂的可持续替代品越来越受到关注。在这项工作中，我们展示了一种新型木质素氨基酸（LA）树脂，其配方中含有丰富的无毒成分，并且可以从田间剩余物（玉米芯）和赖氨酸（来自生物基糖）中可再生地获取。 NMR（ 1 H、 31 P、 13 C– 1 H HSQC、 15 N– 1 H HSQC 和15 N– 1 H HMBC）、FTIR、热重分析、凝胶渗透色谱和元素分析可深入了解该物质的物理化学性质。树脂，包括 LA 连接的存在，例如 C-N 交联。 LA 树脂可在木材、金属（铝和不锈钢）和塑料之间形成牢固的粘合。使用 Instron 仪器测量的用 LA 树脂粘合的轻木和中密度纤维板样本的内部粘合强度 (IBS) 与用商业聚氨酯和聚醋酸乙烯酯树脂粘合的内部粘合强度 (IBS) 相当。根据 IBS 测量推断，用臭氧预处理的木质素制备的树脂具有明显更大的摩尔质量，并且与胶合基材的粘合强度更高。这归因于臭氧预处理后木质素中基于活性氧的官能团的产生。因此，LA 树脂有望成为石油基树脂的可行且可持续的替代品。
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