Impact of deep eutectic solvent pre-treatment on the extraction of cellulose nanofibers

Deep Eutectic Solvents (DESs) have emerged as promising eco-friendly pre-treatment agents for lignocellulosic biomass, offering considerable advantages for the nanofibrillation process. This study investigates the impact of DESs on cellulose fibers morphology, focusing on solubilization phenomena in...

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Bibliographic Details
Published in:Cellulose (London) 2024-11, Vol.31 (16), p.9645-9660
Main Authors: Baraka, Farida, Erdocia, Xabier, Velazco-Cabral, Ivan, Hernández-Ramos, Fabio, Dávila-Rodríguez, Izaskun, Maugin, Marine, Labidi, Jalel
Format: Article
Language:English
Subjects:
Bioorganic Chemistry
Cellulose fibers
Ceramics
Chemistry
Chemistry and Materials Science
Composites
Glass
Imidazole
Lignocellulose
Nanofibers
Natural Materials
Organic Chemistry
Original Research
Physical Chemistry
Polymer Sciences
Pretreatment
Response surface methodology
Solubility
Solubilization
Solvents
Sustainable Development
Thermal stability
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Summary:Deep Eutectic Solvents (DESs) have emerged as promising eco-friendly pre-treatment agents for lignocellulosic biomass, offering considerable advantages for the nanofibrillation process. This study investigates the impact of DESs on cellulose fibers morphology, focusing on solubilization phenomena in the amorphous regions that may facilitate cellulose nanofiber production. The pre-treatment process combining a DES (triethylmethylammonium chloride and imidazole, TEMA:IMD) with microwave (MW) energy was optimized to enhance the solubility of cellulosic fibers. A response surface methodology (RSM) was employed to optimize the DES-MW-assisted pre-treatment. Results show that the reaction time and the temperature significantly influence the solubility of cellulosic fibers. The optimized conditions resulted in cellulose fibers with low content of hemicellulose and lignin, high crystallinity index, and improved thermal stability. The effectiveness of DES-MW pre-treatment in producing cellulose nanofibers (CNFs) from native and pre-treated fibers was investigated. Cellulose fibers pre-treated with a DES yielded CNFs with a narrower diameter distribution. Overall, optimized DES-MW pre-treatment offers a promising strategy for the efficient and sustainable extraction of CNFs.
ISSN:0969-0239
1572-882X
DOI:10.1007/s10570-024-06185-0