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<p>Developing epoxy resins directly from biomass that match the performance of fossil-derived systems remains a challenge. Here we introduce a precursor-centric strategy that leverages the intrinsic flexibility of reductive catalytic fractionation to intentionally engineer lignin oligomers with the molecular attributes required for high epoxy reactivity. Here, by systematically mapping catalyst–solvent environments, we identify a tunable region in the hydroxyl content–molecular weight design space that maximizes epoxidation efficiency. Building on this, we establish a developed epoxidation process that, unlike conventional glycidylation, activates aliphatic hydroxyl groups and unlocks their full contribution to epoxy functionality. This combined control over precursor structure and epoxidation chemistry enables lignin-derived liquid resins that cure into high-performance thermosets, with birch-derived material matching commercial bisphenol A diglycidyl ether-based benchmarks. A techno-environmental analysis shows drop-in compatibility, high biomass-to-resin efficiency and meaningful carbon footprint reductions, establishing reductive catalytic fractionation-derived lignin oligomers as a scalable, high-performance epoxy platform.</p><p></p>

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Native lignin-derived oligomers for the synthesis of sustainable high-performance epoxy resins

  • 期刊论文

  • 发表日期：

    2026年4月14日

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  • Yingtuan Zhang,
  • Svetlana Stepanova,
  • Rashmi Singh,
  • Laura Trullemans,
  • William E. Dyer,
  • Baris Kumru,
  • Anja Vananroye,
  • Peter Van Puyvelde,
  • Bert F. Sels

摘要

Developing epoxy resins directly from biomass that match the performance of fossil-derived systems remains a challenge. Here we introduce a precursor-centric strategy that leverages the intrinsic flexibility of reductive catalytic fractionation to intentionally engineer lignin oligomers with the molecular attributes required for high epoxy reactivity. Here, by systematically mapping catalyst–solvent environments, we identify a tunable region in the hydroxyl content–molecular weight design space that maximizes epoxidation efficiency. Building on this, we establish a developed epoxidation process that, unlike conventional glycidylation, activates aliphatic hydroxyl groups and unlocks their full contribution to epoxy functionality. This combined control over precursor structure and epoxidation chemistry enables lignin-derived liquid resins that cure into high-performance thermosets, with birch-derived material matching commercial bisphenol A diglycidyl ether-based benchmarks. A techno-environmental analysis shows drop-in compatibility, high biomass-to-resin efficiency and meaningful carbon footprint reductions, establishing reductive catalytic fractionation-derived lignin oligomers as a scalable, high-performance epoxy platform.