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<p>The development of fully biobased epoxy resins as sustainable alternatives to petroleum-based counterparts is of great significance for addressing resource depletion and environmental concerns. A fully biobased epoxy thermoset was synthesized from a magnolol-derived epoxy monomer (MG-EP) and a furfurylamine-based diamine curing agent (BDFA). The chemical structures were confirmed by FT-IR and ¹H NMR. The MG-EP system showed lower viscosity (0.475&#xa0;Pa·s) than commercial DGEBA, indicating better processability. The cured biobased epoxy resin exhibited a storage modulus of 1.22&#xa0;MPa at 30&#xa0;°C, which was close to that of its petroleum-based counterpart. In addition, the cured biobased epoxy resin showed a tensile strength of 73.8&#xa0;MPa–35.7% higher than that of DGEBA/BDFA. Moreover, it demonstrated enhanced char yield (44.9% vs. 21.6%) at 800&#xa0;°C, and reduced heat release (PHRR 173.1&#xa0;W/g vs. 216.6&#xa0;W/g, THR 20.3&#xa0;kJ/g vs. 26.1&#xa0;kJ/g) compared to those of DGEBA/BDFA. As a result, MG-EP/BDFA achieved a V-1 UL-94 rating. This work presents a promising strategy for developing high-performance fully biobased epoxy resins with integrated mechanical strength and fire safety.</p>

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The fully biobased epoxy resin with enhanced flame retardancy and mechanical property

  • 期刊论文

  • 发表日期：

    2026年7月20日

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  • Zijian Wang,
  • Jiaxin Cheng,
  • Yanjie Zhu,
  • Xiaori Cong,
  • Yuan Zhang

摘要

The development of fully biobased epoxy resins as sustainable alternatives to petroleum-based counterparts is of great significance for addressing resource depletion and environmental concerns. A fully biobased epoxy thermoset was synthesized from a magnolol-derived epoxy monomer (MG-EP) and a furfurylamine-based diamine curing agent (BDFA). The chemical structures were confirmed by FT-IR and ¹H NMR. The MG-EP system showed lower viscosity (0.475 Pa·s) than commercial DGEBA, indicating better processability. The cured biobased epoxy resin exhibited a storage modulus of 1.22 MPa at 30 °C, which was close to that of its petroleum-based counterpart. In addition, the cured biobased epoxy resin showed a tensile strength of 73.8 MPa–35.7% higher than that of DGEBA/BDFA. Moreover, it demonstrated enhanced char yield (44.9% vs. 21.6%) at 800 °C, and reduced heat release (PHRR 173.1 W/g vs. 216.6 W/g, THR 20.3 kJ/g vs. 26.1 kJ/g) compared to those of DGEBA/BDFA. As a result, MG-EP/BDFA achieved a V-1 UL-94 rating. This work presents a promising strategy for developing high-performance fully biobased epoxy resins with integrated mechanical strength and fire safety.