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Renewable and flexible thermosetting epoxies based on functionalized biorefinery lignin fractions
Materials Today Sustainability ( IF 7.1 ) Pub Date : 2021-10-16 , DOI: 10.1016/j.mtsust.2021.100083
W.-X. Li 1 , L.-P. Xiao 1 , X.-Y. Li 1 , W.-Z. Xiao 1 , Y.-Q. Yang 1 , R.-C. Sun 1
Affiliation  

Epoxy resin materials are spread all over the daily life with their excellent physical, mechanical, and insulating properties. However, the biologically toxic bisphenol A used in epoxy resins formulations has brought a long lasing environmental problem. It is therefore urgent to design and develop more biodegradable alternatives to mitigate the plastic menace. Lignin is an abundant biopolymer with great potential to replace petroleum-based chemicals; however, its valorization is commonly limited because of the heterogeneity. In this regard, a green and simple strategy to fabricate renewable and flexible lignin-based thermosetting epoxies with enhanced mechanical strength has been developed. Specifically, industrial biorefinery lignins are firstly fractioned through a green and simple gradient precipitation and then modified with introduced epoxy groups into the lignin macromolecule under a mild reaction condition. The cross-linking treatment facilities improved interfacial bonding forces between modified lignin fractionations and bisphenol A diglycidyl ether (BADGE) with varied contents (5–15 wt%). The fabricated cured epoxy thermosetting plastic exhibits an enhanced tensile strength (29.7%) and elongation (26.8%) as compared to those of the pure commercial BADGE polymer. We envision that the present strategy provides a new possibility for lignin valorization and design of high-performance flexible thermosetting epoxies for remarkable multifunctionality.



中文翻译:

基于功能化生物精炼木质素部分的可再生和柔性热固性环氧树脂

环氧树脂材料以其优异的物理、机械和绝缘性能遍布日常生活。然而,环氧树脂配方中使用的生物毒性双酚A带来了长期的环境问题。因此,迫切需要设计和开发更多可生物降解的替代品来减轻塑料的威胁。木质素是一种丰富的生物聚合物,具有替代石油基化学品的巨大潜力;然而,由于异质性,其价值通常受到限制。在这方面,已经开发出一种绿色且简单的策略来制造具有增强机械强度的可再生和柔性木质素基热固性环氧树脂。具体来说,工业生物炼制木质素首先通过绿色简单的梯度沉淀进行分馏,然后在温和的反应条件下将环氧基团引入木质素大分子中进行改性。交联处理设施提高了改性木质素分馏物和不同含量(5-15wt%)的双酚 A 二缩水甘油醚(BADGE)之间的界面结合力。与纯商业 BADGE 聚合物相比,制造的固化环氧树脂热固性塑料具有更高的拉伸强度 (29.7%) 和伸长率 (26.8%)。我们设想目前的策略为木质素的增值和高性能柔性热固性环氧树脂的设计提供了新的可能性,以实现卓越的多功能性。交联处理设施提高了改性木质素分馏物和不同含量(5-15wt%)的双酚 A 二缩水甘油醚(BADGE)之间的界面结合力。与纯商业 BADGE 聚合物相比,制造的固化环氧树脂热固性塑料具有更高的拉伸强度 (29.7%) 和伸长率 (26.8%)。我们设想目前的策略为木质素的增值和高性能柔性热固性环氧树脂的设计提供了新的可能性,以实现卓越的多功能性。交联处理设施提高了改性木质素分馏物和不同含量(5-15wt%)的双酚 A 二缩水甘油醚(BADGE)之间的界面结合力。与纯商业 BADGE 聚合物相比,制造的固化环氧树脂热固性塑料具有更高的拉伸强度 (29.7%) 和伸长率 (26.8%)。我们设想目前的策略为木质素的增值和高性能柔性热固性环氧树脂的设计提供了新的可能性,以实现卓越的多功能性。8%) 与纯商业 BADGE 聚合物相比。我们设想目前的策略为木质素的增值和高性能柔性热固性环氧树脂的设计提供了新的可能性,以实现卓越的多功能性。8%) 与纯商业 BADGE 聚合物相比。我们设想目前的策略为木质素的增值和高性能柔性热固性环氧树脂的设计提供了新的可能性,以实现卓越的多功能性。

更新日期:2021-11-12
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