Authors
Zoe Smania, Degnet M Dereje, Silvia Zanatta, Michele Modesti, Pietro Ostellari, Silvia Gross, Mauro Carraro
Published in
ChemSusChem. Volume 19. Issue 17. Pages e71028. Sep 14, 2026.
Abstract
A series of new deep eutectic solvents (DESs) was prepared to enable a greener approach to cellulose recovery from cotton products and textile waste. In this context, while choline-based binary DESs have been extensively investigated, alternative systems, especially metal-based hydrated DESs, have received less attention. In this work, four novel ternary DESs were synthesized using (i) ZnCl2 or CaCl2 and (ii) lactic acid or tartaric acid, (iii) with water added as a third component. By combining the hydrogen bond-disrupting capacity of traditional binary DESs with the lubricating-modifier and stabilizing effects of water, low-viscosity DESs, stable at room temperature, were obtained. These systems demonstrated remarkable versatility in processing cellulose from different sources, enabling complete dissolution of microcrystalline cellulose (MCC) and extensive structural disruption of cotton fibers to recover regenerated cellulose or nanocellulose (NC). The DES formulations were characterized through thermal and rheological analyses, including differential scanning calorimetry (DSC). The thermal stability, morphology, and structural changes of the processed cellulosic materials were investigated using thermogravimetric analysis (TGA), Fourier-transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), polarized light microscopy (PLM), and electron microscopies (TEM and SEM/EDX). Overall, these results highlight the potential of earth-abundant, cost-effective metal-based DESs for the sustainable valorization of cotton-derived waste.
PMID:
42696623
Bibliographic data and abstract were imported from PubMed on 05 Sep 2026.
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