Issue 11, 2023

Bio-based non-isocyanate poly(hydroxy urethane)s (PHU) derived from vanillin and CO2

Abstract

As an alternative to the use of hazardous phosgene-based isocyanates for polyurethane preparation, non-isocyanate poly(hydroxy urethanes) (PHU) based on 5-membered cyclic carbonates have been developed. However, to date, most aromatic PHUs are oil-based or based on toxic precursors such as bisphenol-A. In this work, bio-based non-isocyanate poly(hydroxy urethanes) (PHUs) prepared from vanillin are reported for the first time. First, three different vanillin-derived bis-cyclic carbonates were synthesized. Subsequently, each monomer was reacted with two different bis-amines to yield six different PHUs, which were characterized in depth by 1H and 13C NMR spectroscopy, FTIR, SEC and DSC. PHUs based on vanillic acid were found to exhibit thermal properties superior to bisphenol A-based PHUs, with a Tg of around 66 °C. It is envisioned that vanillin-based PHUs could potentially be a safer alternative to harmful bisphenol A-based PHUs and provide a useful strategy for CO2 revalorization, especially considering that vanillin is an abundant byproduct of Kraft lignin production.

Graphical abstract: Bio-based non-isocyanate poly(hydroxy urethane)s (PHU) derived from vanillin and CO2

Supplementary files

Article information

Article type
Paper
Submitted
08 mar 2023
Accepted
15 mai 2023
First published
16 mai 2023
This article is Open Access
Creative Commons BY-NC license

Mater. Adv., 2023,4, 2437-2448

Bio-based non-isocyanate poly(hydroxy urethane)s (PHU) derived from vanillin and CO2

N. Fanjul-Mosteirín, L. P. Fonseca, A. P. Dove and H. Sardon, Mater. Adv., 2023, 4, 2437 DOI: 10.1039/D3MA00111C

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