如今,纳米纤维素生产工艺具有许多绿色优点,环保,和成本效益是迫切需要的。酸性低共熔溶剂(ADES),作为一种新兴的绿色溶剂,近年来已广泛应用于纳米纤维素的制备,由于其独特的优势,包括无毒性,低成本,容易合成,可回收性,和生物降解性。目前,几项研究探索了ADES在纳米纤维素生产中的有效性,特别是基于氯化胆碱(ChCl)和羧酸的那些。已经使用了各种酸性深共晶溶剂,具有代表性的如ChCl-草酸/乳酸/甲酸/乙酸/柠檬酸/马来酸/乙酰丙酸/酒石酸。在这里,我们全面回顾了这些ADES的最新进展,注重治疗程序和关键优势。此外,讨论了在纳米纤维素制造中实施基于ChCl/羧酸的DES的挑战和前景。最后,提出了推进纳米纤维素产业化的一些建议,这将有助于可持续和大规模生产纳米纤维素的路线图。
Nowadays, nanocellulose production processes with numerous merits of green, eco-friendly, and cost-effective are in urgent need. Acidic deep eutectic solvent (ADES), as an emerging green solvent, has been widely applied in the preparation of nanocellulose over the past few years, owing to its unique advantages, including non-toxicity, low cost, easy synthesis, recyclability, and biodegradability. At present, several studies have explored the effectiveness of ADESs in nanocellulose production, particularly those based on choline chloride (ChCl) and carboxylic acids. Various acidic deep eutectic solvents have been employed, with representative ones such as ChCl-oxalic/lactic/formic/acetic/citric/maleic/levulinic/tartaric acid. Herein, we comprehensively reviewed the latest progress of these ADESs, focusing on the treatment procedures and key superiorities. In addition, the challenges and outlooks of ChCl/carboxylic acids-based DESs implementation in the fabrication of nanocellulose were discussed. Finally, some suggestions were proposed to advance the industrialization of nanocellulose, which would help for the roadmap of sustainable and large-scale production of nanocellulose.