Research Progress of Deep Eutectic Solvents in Chitin Extraction and Preparation of Nano-chitin
Chitin is a natural nitrogen-containing polysaccharide.It is biocompatible,biodegradable,safe and non-toxic.It has been widely used in food,medicine,and other fields.At present,the extraction and dissolution of chitin mostly use acid-base treatment,which causes great environmental pollution,so it is necessary to search green technology.Deep eutectic solvents(DESs)are analogue of ionic liquid formed through hydrogen bond interaction between hydrogen bond acceptor(HBA)and hydrogen bond donor(HBD).It has the advantages of friendly environment and simple preparation.In recent years,great progress has been made in green extraction of chitin and preparation of nano-chitin materials by using DESs.In this paper,the main research progress of chitin extraction and dissolution preparation of nano-chitin based on DESs in recent years was reviewed.The extraction efficiency of chitin from DESs with different HBA and HBD were compared,and the factors affecting extraction were analyzed.The dissolution of chitin in DESs and the preparation process of nano-chitin were summarized.This paper also gives a prospect on the research in this field,in order to promote the research and application of DESs in this field.
deep eutectic solventschitin extractionchitin dissolutionchitin nanofiberschitin nanocrystals
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