Feghali Elias, van de Pas Daniel J, Parrott Andrew J, Torr Kirk M
Chemical Engineering Program, Notre Dame University-Louaize, P.O. Box 72 Zouk Mikael, 1211 Zouk Mosbeh, Lebanon.
Scion, Private Bag 3020, Rotorua 3046, New Zealand.
ACS Macro Lett. 2020 Aug 18;9(8):1155-1160. doi: 10.1021/acsmacrolett.0c00424. Epub 2020 Jul 28.
Biobased epoxy thermoset polymers were prepared from lignin hydrogenolysis oils produced from native hardwood lignin. Native lignin in and 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.
生物基环氧热固性聚合物由天然阔叶木木质素制得的木质素氢解油制备而成。将[具体树木名称1]和[具体树木名称2]木材中的天然木质素在钯催化的温和氢解条件下进行原位反应，得到产率高达98 wt%的解聚木质素油。将这些木质素油与环氧氯丙烷反应制得生物基环氧树脂。将这些树脂与不可再生的双酚A二缩水甘油醚（BADGE）按不同比例混合，并用二亚乙基三胺固化，制得一系列生物基含量不同的环氧热固性聚合物。在获得与BADGE对照聚合物相当或更优机械性能的同时，高达67%的BADGE可用阔叶木木质素衍生的环氧树脂替代。比较来自桉木和松木的木质素基环氧聚合物的性能，有助于深入了解在寻求高性能生物基热固性聚合物时使用阔叶木天然木质素与软木天然木质素的优缺点。
