基于刚果红的高分子染料制备及pH响应变色性能

doi:10.11896/cldb.21040018

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Abstract A waterborne polyurethane polymeric dye was prepared with isophorone diisocyanate as hard segment, polyethylene glycol 1000 as soft segment, 1, 4-butanediol as chain extender, and congo red as chromophore, respectively. And then, the waterborne polyurethane polymeric dye was applied onto cotton fabrics via coating to develop a smart textile with pH responsive property. The structures and color properties of the polymer dye were investigated by Fourier transform infrared spectroscopy and UV-Vis spectrum. Also, the pH responsive properties of the polymer dye and its coated cotton fabrics were discussed in detail. Results show that the maximum absorption wavelength of the polymeric dye shows a bathochromic shift of 12 nm. As the pH of the polymeric dye solution decreases, its maximum absorption wavelength shifts from 510 nm to 605 nm and the peak widens, accompanied with the color changing from red to bluish violet, because the structure of congo red after amino protonation transfers into quinoid structure. In addition, the polymeric dye coated cotton fabric gradually turns blue at pH<3, shows significant pH responsive behavior, high sensitivity, good reversibility and long-term stability, and can be repeatedly applied in testing dyeing wastewater.

Key words： congo red waterborne polyurethane polymeric dye pH response reversibility

Published: 10 May 2023 Online: 2023-05-04

CLC number:

TS190.2

Fund:Natural Science Foundation of Jiangsu Province (BK20191045),the School-level Research Projects of Yancheng Institute of Technology (xjr2019030),the Open Project Program of Fujian Province University Engineering Research Center of Textile and Clothing (MJXY-KF-201906),and the Natural Science Foundation of Fujian Province (2020J0849).

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	Articles by authors
	MAO Haiyan
	ZHU Miao
	ZHU Xuefeng
	GUO Ziyi
	LIAO Chengcheng
	HE Xuemei
	SONG Xiaolei

Cite this article:

MAO Haiyan,ZHU Miao,ZHU Xuefeng, et al. Preparation of Congo Red Based Polymeric Dye and Its pH Responsive Property[J]. Materials Reports, 2023, 37(9): 21040018-6.

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http://www.mater-rep.com/EN/10.11896/cldb.21040018 OR http://www.mater-rep.com/EN/Y2023/V37/I9/21040018

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