Work

No More Purification: A Straightforward and Green Process for the Production of Melamine–Vanillylamine-Based Benzoxazine-Rich Resins for Access to Various Composite Materials

Year: 2025

Type: article

Abstract: A rapid microwave-assisted process minimizing waste was set up to produce bio-based benzoxazine-like monomers produced from vanillylamine and melamine. Without excessive purification, different viscous liquid precursors had a remarkable ability to form four strong and transparent different solid cross-linked thermosets, displaying lower curing temperatures under 130 °C. The long and strong adhesive performance of the cured materials was observed using glass slides or aluminum surfaces and they could become a good alternative to adhesive epoxy resin for metal surfaces. At the higher temperatures, these solids could act as efficient flame-retardants proven by thermogravimetric measurements. The best candidates gave a limiting oxidation index value of 41.9. In order to improve the intrinsic surface hydrophobicity of the phenolic resins, slight amounts of silica and iron oxide nanoparticles were dispersed in the polymer matrix, and finally mechanical resistance was pointed out. The most promising of our melamine-based resin was loaded with aluminum pigment to furnish a silver-colored paste ready for being cured to afford a robust solid, which does not undergo contraction or deformation.

Source: Journal of Composites Science

DOI: 10.3390/jcs9030092

Authors: Lisa Guinebaud, Huihui Qiao, Erwann Guenin, Adama Konate, Frederic Delbecq

Institutions: Université de Technologie de Compiègne, École Supérieure de Chimie Organique et Minérale

Language: English

Topic: Epoxy Resin Curing Processes

Subfield: Mechanical Engineering

Field: Engineering

Domain: Physical Sciences

SDG: Responsible consumption and production

Open Access status: gold

Estimated APC paid: $2,172