期刊
CARBOHYDRATE POLYMERS
卷 225, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2019.115255
关键词
Natural deep eutectic solvents; Chitin; Deproteinization; Demineralization; Hermetia illucens
资金
- Natural Science Foundation of Guangdong Province [2018A0303130016]
- Natural Science Foundation of President of Guangdong Academy of Agricultural Sciences [201902]
- Science and Technology Planning Project of Natural Resources Department Guangdong Province [2019014]
- Science and Technology Planning Project of Guangdong Province [2014B020216007]
- Science and Technology Planning Project of Guangzhou [201508020108]
Selectivity of deproteinization and demineralization using natural deep eutectic solvents for preparation of insect chitin (Hermetia illucens) was investigated. The relationships between the pH and pKa values of NADESs and demineralization, deproteinization and crystallinity indexes of the obtained chitin were discussed, respectively. It was found that the acidic NADESs consist of basic hydrogen bond acceptor (HBA) and acidic hydrogen bond donor (HBD), or the alkali NADESs composed of acid HBA and alkali HBD were better for chitin products. After reused for three times, demineralization and deproteinization abilities of NADESs were not significantly decreased. Mechanistic analysis indicated that H+ released from HBA or HBD was the main reason for demineralization, whereas intermolecular and intramolecular hydrogen bond in NADESs facilitates the removal of protein. Overall, this report provides a preliminary reference for design of the sustainable NADESs for preparation of chitin from natural resources.
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