Advances in the dyeing and finishing of technical textiles by M. L. Gulrajani

By M. L. Gulrajani

Using dyes and finishes has an important influence at the aesthetic attraction and performance of technical textiles. Drawing on key examine, Advances within the dyeing and completing of technical textiles info vital advances during this box and their variety of functions. half one stories advances in dyes and colourants, together with quite a few practical dyes, the results they are often used to create and rules concerning their use. half is going directly to examine completing options, equivalent to using enzymes, nanotechnology and speciality polymers.

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It has been found that some metal complex dyes containing nickel as well as sulfonic acid groups as intramolecular singlet oxygen quenching groups show an enhanced light-fastness [25, 26]. In a different approach © Woodhead Publishing Limited, 2013 50 Advances in the dyeing and finishing of technical textiles UV-absorbers containing a built-in photostabilizer moiety have been used as additives to enhance the light-fastness of acid dyes [27]. 3 Antimicrobial dyes Microbes, the minute organisms, can cause allergic responses, disease, infection, objectionable odors, and unsightly stains.

Also a series of some mono azo acid dyes containing the fluoro group have been reported and compared with the parallel series of dyes containing chlorine, and with those containing neither halogen. 3b, c, d, and e. These dyes have better water repellency compared to the dye in the Fig. 3a. Anionic dyes containing fluorine are used as probes to explore the microenvironments in various matrices such as polymers, micelles and cyclodextrins; this is due to the fact that 19F NMR is characterized by an extremely wide range of chemical shifts, with the shift being highly responsive to changes in the microenvironments.

There is an extensive patent activity in the synthesis of coumarins with various substituents in the 3 position. Some of the 3-substituents are [157], furyl, oxazolyl, and oxadiazolyl [158], imidazolyl and pyrimidyl [159], quinolinyl [160], and thiazolyl and thiadiazolyl [161] derivatives. Several cationic coumarins are also known. Some of them are the pyridine derivative (Fig. 5i) [162] which imparts a brilliant orange shade to polyacrylonitrile, and the dye in Fig. 5k [163] which is known to give a fast greenish-yellow shade on acid-modified polyester and acrylic fibers.

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