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Polymers 2016, 8(4), 119; doi:10.3390/polym8040119

Crosslinked and Dyed Chitosan Fiber Presenting Enhanced Acid Resistance and Bioactivities

1
College of Textile and Clothing Engineering, Soochow University, 199 Renai Road, Suzhou 215123, China
2
National Engineering Laboratory for Modern Silk, College of Textile and Clothing Engineering, Soochow University, 199 Renai Road, Suzhou 215123, China
*
Author to whom correspondence should be addressed.
Academic Editor: Naozumi Teramoto
Received: 17 February 2016 / Revised: 27 March 2016 / Accepted: 29 March 2016 / Published: 1 April 2016
(This article belongs to the Special Issue Biodegradable Polymers)
View Full-Text   |   Download PDF [1565 KB, uploaded 1 April 2016]   |  

Abstract

The application of biodegradable chitosan fiber for healthy and hygienic textiles is limited due to its poor acid resistance in wet processing and poor antioxidant activity. In order to prepare chitosan fiber with good acid resistance and high antioxidant activity, chitosan fiber was first crosslinked by a water-soluble aziridine crosslinker, and then dyed with natural lac dye consisting of polyphenolic anthraquinone compounds. The main application conditions and crosslinking mechanism of the aziridine crosslinker, the adsorption mechanism and building-up property of lac dye on the crosslinked fiber, and the effects of crosslinking and dyeing on the antioxidant and antibacterial activities of chitosan fiber were studied. The crosslinked fiber exhibited greatly reduced weight loss in acidic solution, and possessed excellent acid resistance. Lac dye displayed a very high adsorption capability on the crosslinked fiber and a high utilization rate under weakly acidic medium. The Langmuir–Nernst isotherm was the best model to describe the adsorption behavior of lac dye, and Langmuir adsorption had great contribution to total adsorption. Lac dyeing imparted good antioxidant activity to chitosan fiber. Crosslinking and dyeing had no impact on the good inherent antibacterial activity of chitosan fiber. View Full-Text
Keywords: chitosan fiber; acid resistance; antioxidant activity; antibacterial activity; crosslinking; aziridine crosslinker; lac dye chitosan fiber; acid resistance; antioxidant activity; antibacterial activity; crosslinking; aziridine crosslinker; lac dye
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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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Li, X.-Q.; Tang, R.-C. Crosslinked and Dyed Chitosan Fiber Presenting Enhanced Acid Resistance and Bioactivities. Polymers 2016, 8, 119.

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