Reversibly crosslinked polyurethane fibres from sugar-based 5-chloromethylfurfural: Synthesis, fibre-spinning and fibre-to-fibre recycling.

The development of recyclable crosslinked thermosetting fibres is a challenging research topic. In the present work, we have designed and synthesized polyurethane fibres from fructose-derived 5-chloromethylfurfural (CMF) and lignin-derived monomeric phenols. The greenhouse gas emissions associated with the production of CMF showed comparable results to that of 5-hydroxymethylfurfural (HMF), a high potential sugar-based platform molecule. The wet-spun biobased polyurethane fibres produced could be conveniently crosslinked using Diels-Alder chemistry to effectively enhance the glass transition temperature and mechanical properties. At a mildly elevated temperature (140 °C), the chemically crosslinked fibres could be effectively de-crosslinked, which enabled complete separation from a mixture with poly(ethylene terephthalate) (PET) and cotton fibres. These results outline a potential strategy to design and fabricate new biobased fibres with reversible crosslinking, which may enable fibre-to-fibre recycling.© 2024 Wiley‐VCH GmbH.

Citation

Niklas Warlin, Maria Nelly Garcia Gonzalez, Rafael Menezes, Andras Karajos, Emma Olsson, Caroline Almqvist, Mahmoud Sayed, Smita V Mankar, Nitin Valsange, Omar Y Abdelaziz, Christian P Hulteberg, Fredrik G Bäcklund, Zengwei Guo, Nicola Rehnberg, Stefan Lundmark, Rajni Hatti-Kaul, Patric Jannasch, Baozhong Zhang. Reversibly crosslinked polyurethane fibres from sugar-based 5-chloromethylfurfural: Synthesis, fibre-spinning and fibre-to-fibre recycling. ChemSusChem. 2024 Oct 01:e202402067e202402067

PMID: 39352793

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