Divanillin-based aromatic amines: synthesis and application as curing agents for bio-based epoxy thermosets

TL;DR

This paper reports the synthesis of bio-based diamines from vanillin and their application as curing agents for epoxy thermosets, resulting in materials with promising thermomechanical properties as sustainable alternatives.

Contribution

It introduces new bio-based diamines derived from vanillin and demonstrates their effectiveness as curing agents for epoxy thermosets, highlighting their potential as sustainable hardeners.

Findings

Epoxy thermosets with bio-based diamines showed high glass transition temperatures.

The thermosets exhibited significant char residue, indicating good thermal stability.

The bio-based amines are promising environmentally friendly alternatives to conventional hardeners.

Abstract

New bio-based diamines were successfully synthesized from vanillin and fully characterized. These amines, methylated divanillylamine (MDVA) and 3,4-dimethoxydianiline (DMAN), were then used as curing agent with epoxy monomers. Epoxy thermosets obtained from these new bio-based amines exhibited promising thermomechanical properties in terms of glass transition temperature and char residue. These latter could be valuable alternative to conventional amine hardener.