Biobased Epoxy Thermoset Polymers from Depolymerized Native Hardwood Lignin,ACS Macro Letters

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Biobased Epoxy Thermoset Polymers from Depolymerized Native Hardwood Lignin
ACS Macro Letters ( IF 5.1 ) Pub Date : 2020-07-28 , DOI: 10.1021/acsmacrolett.0c00424
Elias Feghali ₁ , Daniel J van de Pas ₂ , Andrew J Parrott ₂ , Kirk M Torr ₂

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Biobased epoxy thermoset polymers were prepared from lignin hydrogenolysis oils produced from native hardwood lignin. Native lignin in Eucalyptus nitens and Eucalyptus saligna wood was reacted in situ under Pd-catalyzed mild hydrogenolysis conditions to give depolymerized lignin oils in yields up to 98 wt %. Reacting these lignin oils with epichlorohydrin produced biobased epoxy resins. Blending these resins with nonrenewable bisphenol A diglycidyl ether (BADGE) in different proportions, and curing with diethylenetriamine, produced a series of epoxy thermoset polymers with varying biobased content. Up to 67% of the BADGE could be replaced with hardwood lignin-derived epoxy resins while achieving superior or equivalent mechanical properties to the BADGE control polymer. Comparing the performance of lignin-based epoxy polymers from eucalyptus and pine wood provided insights into the advantages and disadvantages of using hardwood versus softwood native lignins in the quest for high performance biobased thermoset polymers.

中文翻译：

由解聚的天然硬木木质素制成的生物基环氧热固性聚合物

生物基环氧热固性聚合物由天然硬木木质素生产的木质素氢解油制备。Eucalyptus nitens和Eucalyptus saligna中的天然木质素木材在钯催化的温和氢解条件下原位反应，得到解聚的木质素油，收率高达 98 wt%。将这些木质素油与环氧氯丙烷反应产生生物基环氧树脂。将这些树脂与不同比例的不可再生双酚 A 二缩水甘油醚 (BADGE) 混合，并用二乙烯三胺固化，生产出一系列具有不同生物基含量的环氧热固性聚合物。高达 67% 的 BADGE 可以用硬木木质素衍生的环氧树脂代替，同时获得与 BADGE 控制聚合物相同或更好的机械性能。比较来自桉树和松木的木质素基环氧聚合物的性能，可以深入了解在寻求高性能生物基热固性聚合物时使用硬木与软木天然木质素的优缺点。

更新日期：2020-08-18

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