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Polymers 2016, 8(9), 338; doi:10.3390/polym8090338

Preparation of a Novel Chitosan Based Biopolymer Dye and Application in Wood Dyeing

1
Beijing Key Laboratory of Wood Science and Engineering, Beijing Forestry University, Beijing 100083, China
2
Ministry of Education Key Laboratory of Wooden Material Science and Application, Beijing Forestry University, Beijing 100083, China
*
Authors to whom correspondence should be addressed.
Academic Editor: Antonio Pizzi
Received: 30 June 2016 / Revised: 22 August 2016 / Accepted: 7 September 2016 / Published: 10 September 2016
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Abstract

A novel chitosan-based biopolymer dye possessing antibacterial properties was synthesized by reaction of O-carboxymethyl chitosan and Acid Red GR. The synthesized materials were characterized by Fourier transform infrared spectroscopy (FTIR), degree of substitution (DS), X-ray photoelectron spectroscopy (XPS), thermogravimetric analysis (TG), X-ray diffraction (XRD), water solubility test, antibacterial property test, and dyeing performance, including dye uptake, color difference, and fastness. Results showed that the synthesized dye was combined by –NH3+ of O-carboxymethyl chitosan and the sulfonic group of Acid Red GR. According to the comprehensive analysis of XRD and water solubility, the introduction of the carboxymethyl group and acid dye molecule changed the structure of the chitosan from compact to loose, which improved the synthesized dye’s water solubility. However, the thermal stability of the synthesized dye was decreased. The antibacterial property of the poplar wood dyed with the synthesized dye was enhanced and its antibacterial rate, specifically against Staphylococcus aureus and Escherichia coli, also increased to a rate of more than 99%. However, the dye uptake of the synthesized dye was lower than that of the original dye. Despite this, though, the dyeing effect of the synthesized dye demonstrated better water-fastness, and light-fastness than the original dye. Therefore, the novel chitosan-based biopolymer dye can be a promising product for wood dyeing. View Full-Text
Keywords: O-carboxymethyl chitosan; dye; preparation; antibacterial activity; water solubility; dyeing performance O-carboxymethyl chitosan; dye; preparation; antibacterial activity; water solubility; dyeing performance
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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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Wang, X.; Tang, R.; Zhang, Y.; Yu, Z.; Qi, C. Preparation of a Novel Chitosan Based Biopolymer Dye and Application in Wood Dyeing. Polymers 2016, 8, 338.

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