Lignin-based composites with enhanced mechanical properties by acetone fractionation and epoxidation modification,iScience

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Lignin-based composites with enhanced mechanical properties by acetone fractionation and epoxidation modification
iScience ( IF 4.6 ) Pub Date : 2023-02-13 , DOI: 10.1016/j.isci.2023.106187
Shuang-Lin Zou ₁ , Ling-Ping Xiao ₁ , Xiao-Ying Li ₁ , Wen-Zhen Yin ₁ , Run-Cang Sun ₁

Affiliation

Epoxy resin is widely used in various fields of the national economy due to its excellent chemical and mechanical properties. Lignin is mainly derived from lignocelluloses as one of the most abundant renewable bioresources. Due to the diversity of lignin sources and the complexity as well as heterogeneity of its structure, the value of lignin has not been fully realized. Herein, we report the utilization of industrial alkali lignin for the preparation of low-carbon and environmentally friendly bio-based epoxy thermosetting materials. Specifically, epoxidized lignin with substituted petroleum-based chemical bisphenol A diglycidyl ether (BADGE) in various proportions was cross-linked to fabricate thermosetting epoxies. The cured thermosetting resin revealed enhanced tensile strength (4.6 MPa) and elongation (315.5%) in comparison with the common BADGE polymers. Overall, this work provides a practicable approach for lignin valorization toward tailored sustainable bioplastics in the context of a circular bioeconomy.

中文翻译：

通过丙酮分馏和环氧化改性增强机械性能的木质素基复合材料

环氧树脂以其优良的化学和机械性能而广泛应用于国民经济的各个领域。木质素主要来源于木质纤维素，木质纤维素是最丰富的可再生生物资源之一。由于木质素来源的多样性及其结构的复杂性和异质性，木质素的价值尚未得到充分发挥。本文报道了利用工业碱木质素制备低碳环保的生物基环氧热固性材料。具体来说，环氧化木质素与不同比例的取代石油基化学双酚A二缩水甘油醚（BADGE）交联以制造热固性环氧树脂。与常见的 BADGE 聚合物相比，固化的热固性树脂显示出更高的拉伸强度 (4.6 MPa) 和伸长率 (315.5%)。总体而言，这项工作为循环生物经济背景下的木质素增值提供了一种实用的方法，以实现定制的可持续生物塑料。

更新日期：2023-02-13

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