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Bio-Based Aromatic Epoxy Monomers for Thermoset Materials.

Feifei Ng1, Guillaume Couture2, Coralie Philippe3

  • 1Institut Charles Gerhardt-UMR 5253, CNRS, Université de Montpellier, ENSCM, 8 rue de l'Ecole Normale, 34296 Montpellier, France. feifeing.fr@gmail.com.

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Summary

This review explores sustainable alternatives to bisphenol A (BPA) for creating bio-based epoxy networks. It highlights renewable aromatic epoxide building blocks derived from biomass for advanced polymer applications.

Keywords:
aromaticcardanolepichlorohydrinepoxidationlignintannin

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Area of Science:

  • Polymer Chemistry
  • Materials Science
  • Green Chemistry

Background:

  • Epoxy networks are vital thermosetting polymers used in diverse applications like coatings and adhesives.
  • Current industrial production relies heavily on bisphenol A (BPA), raising concerns due to its toxicity and the non-renewability of fossil resources.
  • The need for sustainable, non-toxic, and recyclable alternatives to BPA-based epoxy resins is critical.

Purpose of the Study:

  • To provide a comprehensive overview of aromatic multifunctional epoxide building blocks synthesized from renewable biomass resources.
  • To review recent advancements in bio-based epoxy materials as sustainable alternatives to conventional BPA-based thermosets.
  • To categorize and discuss various epoxy prepolymers derived from natural sources.

Main Methods:

  • Literature review of scientific publications on bio-based epoxy synthesis and applications.
  • Analysis of glycidylation routes and mechanisms for epoxide formation.
  • Categorization of epoxy prepolymers based on aromaticity and epoxy group functionality.

Main Results:

  • Identification and description of various aromatic molecules from natural sources suitable for epoxy synthesis.
  • Classification of bio-based epoxy prepolymers ranging from mono-aromatic di-epoxy to complex poly-aromatic structures.
  • Discussion of BPA toxicity and regulatory context driving the search for alternatives.

Conclusions:

  • Renewable resources offer viable pathways for synthesizing aromatic epoxy building blocks.
  • Bio-based epoxy networks present a promising sustainable alternative to traditional BPA-based thermosets.
  • Further research into biomass-derived epoxides can lead to environmentally friendly materials with desirable properties.