文献类型：期刊文献

英文题名：A contrastive study of adsorption behaviors on polyurethane fiber with diester/diurethane tethered and non-tethered azo disperse dyes

作者：Qian, Hong-Fei[1];Feng, Gaofeng[2];Bai, Gang[1];Liu, Yan-Chun[1];Hu, Ling-Ling[1]

机构：[1]Shaoxing Univ, Key Lab Clean Dyeing & Finishing Technol Zhejiang, Shaoxing 312000, Peoples R China;[2]Shaoxing Univ, Coll Chem & Chem Engn, Shaoxing 312000, Peoples R China

年份：2017

卷号：145

起止页码：301

外文期刊名：DYES AND PIGMENTS

收录：SCI-EXPANDED(收录号：WOS:000405972900035)、、EI(收录号：20172503795468)、Scopus(收录号：2-s2.0-85020779308)、WOS

基金：National Natural Science Foundation of China; Contract grant number: 21376149 and 21676166.

语种：英文

外文关键词：Tethered azo disperse dye; Polyurethane fibers; Adsorption behaviors; Crystal growth

外文摘要：look for a way to improve the fastness properties of disperse dyes on PU fibers, six diurethane/diester tethered azo disperse dyes were prepared and applied to the dyeing of polyurethane fibers. Their detailed adsorption behaviors including the dyeing rate, build-up properties, surface-adsorbed state of dyes and colorimetric properties were investigated as well as compared with those of non-tethered azo dyes. The results showed that there were great differences in adsorption properties between the two types of dyes. The excellent build-up performance of the non-tethered dyes was caused by the crystal growth on the surface of polyurethane fibers, and the serious aggregation of dyes on the surface of fibers would alter the color shade, decrease the chroma and produce poor colorfastness properties. When the tethered dyes were applied to polyurethane fibers, owing to their larger molecular sizes, a higher temperature (120 degrees C) was needed to finish the dyeing process within a conventional time of 30-40 min, and the crystal growth on the surface of polyurethane fibers was obviously restricted, so that the color of dyed PU fibers became bright and the colorfastness was notably improved. With additional dye concentration, a medium color depth was obtained. It was further demonstrated that the tethering modification of azo disperse dyes to enhance the colorfastness on polyurethane fibers was feasible. (C) 2017 Elsevier Ltd. All rights reserved.