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Mar. Drugs 2014, 12(11), 5547-5562; doi:10.3390/md12115547

Synthesis and Rheological Characterization of Water-Soluble Glycidyltrimethylammonium-Chitosan

Institute of Organic and Polymeric Materials, National Taipei University of Technology, 1, Sec. 3, Zhongxiao E. Rd., Taipei 10648, Taiwan
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Received: 9 October 2014 / Revised: 5 November 2014 / Accepted: 12 November 2014 / Published: 20 November 2014
(This article belongs to the Special Issue Advances in Marine Chitin and Chitosan)
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Abstract

In this study, chitosan (CS) grafted by glycidyltrimethylammonium chloride (GTMAC) to form GTMAC-CS was synthesized, chemically identified, and rheologically characterized. The Maxwell Model can be applied to closely simulate the dynamic rheological performance of the chitosan and the GTMAC-CS solutions, revealing a single relaxation time pertains to both systems. The crossover point of G′ and Gʺ shifted toward lower frequencies as the CS concentration increased but remained almost constant frequencies as the GTMAC-CS concentration increased, indicating the solubility of GTMAC-CS in water is good enough to diminish influence from the interaction among polymer chains so as to ensure the relaxation time is independent of the concentration. A frequency–concentration superposition master curve of the CS and GTMAC-CS solutions was subsequently proposed and well fitted with the experimental results. Finally, the sol-gel transition of CS is 8.5 weight % (wt %), while that of GTMAC-CS is 20 wt %, reconfirming the excellent water solubility of the latter. View Full-Text
Keywords: chitosan (CS); glycidyltrimethylammonium chitosan (GTMAC-CS); maxwell model; relaxation time; frequency-concentration master curve; sol-gel transition chitosan (CS); glycidyltrimethylammonium chitosan (GTMAC-CS); maxwell model; relaxation time; frequency-concentration master curve; sol-gel transition
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Rwei, S.-P.; Chen, Y.-M.; Lin, W.-Y.; Chiang, W.-Y. Synthesis and Rheological Characterization of Water-Soluble Glycidyltrimethylammonium-Chitosan. Mar. Drugs 2014, 12, 5547-5562.

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