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Influence of degree of N-butyrylation on critical concentration of N-butyrylated chitosan/dichloroacetic acid liquid crystalline solution

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Influence of degree of N-butyrylation on critical concentration of N-butyrylated chitos.htm (400bytes)
Date
2001
Author
Dong, YM
董炎明
Xu, CY
Wang, JW
Wu, YS
Ruan, YH
Wang, M
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  • 化学化工-已发表论文 [14469]
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Abstract
N-butyrylated chitosan with various degree of N-butyrylation (DB) were prepared by mixing completely deacetylated chitosan and butyric anhydride in mild condition without serious degradation and O-substitution. A standard curve to measure DB was obtained by plotting the infrared absorbance ratio of A(1560)/A(2880) against the known DB (from 0%similar to 99%) of eight specimens. The influence of DB on the critical concentration C* of N-butyrylated chitosan/dichloroacetic acid solutions required to form mesophase was investigated by optical method. A maximum C* value appeared at medium DB. The effect was explained by the disordering of chain with medium composition ratio of the copolymer of glucosamine and N-butyryl glucosamine.
Citation
POLYMER BULLETIN,2001,45(6):495-500
URI
http://dx.doi.org/doi:10.1007/s002890170103
https://dspace.xmu.edu.cn/handle/2288/12720

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