Journal
CARBOHYDRATE POLYMERS
Volume 201, Issue -, Pages 211-217Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2018.08.059
Keywords
Chitin; Acid base deep eutectic solvents; Lobster shell; Molecular weight
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Funding
- Natural Science Foundation of China [31370567]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
- Doctorate Fellowship Foundation of Nanjing Forestry University
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Deep eutectic solvent (DES) prepared from choline chloride and four organic acid were evaluated for the extraction of chitin from lobster shell. It was found that the purity of chitins extracted with DESs was related to acid used. Purity of chitin extracted with choline chloride-malonic acid was the highest. Chitins extracted through DES treatment results in various molecular weight, which is associated with type of acid and temperature used during the treatment. For instance, chitin produced by malonic acid at 50 degrees C and 100 degrees C results in molecular weight of 312 KDa and 199 KDa respectively, whereas it extracted with malic acid at 100 degrees C results in 91 KDa. The physicochemical properties of chitins were characterized by FTIR, XRD, TG and SEM. Moreover, the CaCO3 was successfully converted into levulinic acid calcium salt which could be used as calcium supplement.
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