Surface Activity of Amphiphilic Derivatives of Carboxymethylchitosan

Abstract

Abstract: A new type of amphiphilic derivatives of carboxymethylchitosan(CMCHS) was prepared by reaction of CMCHS with alkyl glycidol ether. The surface properties were studied by means of surface tension. It was found that for the same chitosan derivative, within some substitution degree(SD), the efficiency and effectiveness of the decreasing of surface tension increased with the increase of SD. For the similar SD of the same series of carboxymethylchitosan derivatives, the longer the amphiphilic group chain length, the more the surface activity. When the SD of the carboxymethylchitosan derivatives was high and the amphiphilic group chain length was not very long, two transitions points appeared in the surface tension vs. concentration curve, which means the possibilities of the formation of intramolecular micelle. These phenomena did not appear for the derivatives with less SD and long amphiphilic group chain length.

Key words: Amphiphilic derivatives, Derivatives of carboxymethylchitosan, Surface activity, Surface tension

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SUI Wei-Ping, JIANG Xiao-Jie, ZHAI Li-Min, CHEN Guo-Hua . Surface Activity of Amphiphilic Derivatives of Carboxymethylchitosan[J]. Chem. J. Chinese Universities, 2004, 25(1): 99.

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Surface Activity of Amphiphilic Derivatives of Carboxymethylchitosan

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