Toward Bio-Based Epoxy Thermoset Polymers from Depolymerized Native Lignins Produced at the Pilot Scale.,Biomacromolecules

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Toward Bio-Based Epoxy Thermoset Polymers from Depolymerized Native Lignins Produced at the Pilot Scale.
Biomacromolecules ( IF 5.5 ) Pub Date : 2020-03-18 , DOI: 10.1021/acs.biomac.0c00108
Elias Feghali ₁ , Daniel J van de Pas ₂ , Kirk M Torr ₂

Affiliation

Producing the next generation of thermoset polymers from renewable sources is an important sustainability goal. Hydrogenolysis of pinewood lignin was scaled up for the first time from lab scale to a 50 L pilot-scale reactor, producing a range of depolymerized lignin oils under different conditions. These lignin hydrogenolysis oils were glycidylated, blended with bisphenol A diglycidyl ether, and cured to give epoxy thermoset polymers. The thermal and mechanical properties of the epoxy polymers were assessed by differential scanning calorimetry, thermogravimetric analysis, flexural testing, and dynamic mechanical thermal analysis. Replacing up to 67% of the bisphenol A epoxy with the lignin oil epoxies resulted in cured epoxy polymers with improvements of up to 25% in flexural stiffness and strength. Considerable scope exists in simplifying and scaling up the hydrogenolysis process to produce depolymerized lignins that can substitute established petrochemicals in the quest for renewable high-performance thermoset polymers.

中文翻译：

从中试规模生产的解聚天然木质素向生物基环氧热固性聚合物发展。

由可再生资源生产下一代热固性聚合物是一项重要的可持续性目标。松木木质素的氢解反应首次从实验室规模扩大到50 L中试规模的反应器，从而在不同条件下生产了一系列解聚的木质素油。将这些木质素氢解油缩水甘油基化，与双酚A二缩水甘油醚混合，然后固化，得到环氧热固性聚合物。环氧聚合物的热和机械性能通过差示扫描量热法，热重分析，弯曲试验和动态机械热分析进行评估。用木质素油环氧树脂代替多达67％的双酚A环氧树脂，可得到固化的环氧聚合物，其弯曲刚度和强度提高多达25％。

更新日期：2020-04-23

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