Pregled bibliografske jedinice broj: 12345
The Problem of Phthalocyanine Dyes
The Problem of Phthalocyanine Dyes // Proceedings of the 3rd International Conference on Textile Science 1998 (TEXCI 98) / Militki, Jiri (ur.).
Liberec: Technical University, 1998. str. 528-529 (poster, međunarodna recenzija, cjeloviti rad (in extenso), znanstveni)
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Naslov
The Problem of Phthalocyanine Dyes
Autori
Karaman, Boris ; Parac-Osterman, Đurđica
Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni
Izvornik
Proceedings of the 3rd International Conference on Textile Science 1998 (TEXCI 98)
/ Militki, Jiri - Liberec : Technical University, 1998, 528-529
Skup
International Conference on Textile Science (3 ; 1998)
Mjesto i datum
Liberec, Češka Republika, 25.05.1998. - 27.05.1998
Vrsta sudjelovanja
Poster
Vrsta recenzije
Međunarodna recenzija
Ključne riječi
phtalicyanine dyes
Sažetak
Phthalocyanine dyes have a complex structure of high molecular mass, low solubility, and copper as the most usual central atom of the complex. The characteristics of these dyestuffs are low efficiency and present a high environmental hazard. Despite this problems, and due to their quite specific hue, these dyes are present in all the groups of dyestuffs used in industry today. The successfulness of their exploration depends greatly upon the choice of the electrolyte used (salt), which is responsible for the degree of exhaustion. This paper discusses the problem of phthalocyanine dyes in the view of the choice and amount of electrolyte used, NaCl and Na2SO4 in the amounts of 0, 5, 50 and 100 g/L. The dyestuffs C.I.Direct Blue 86 (of a known chemical structure), X reactive turquoise (bifunctional reactive dye), C.I.Reactive Blue 7, C.I.Reactive Blue 21 were chosen. The measurements of elektropotential (mV) and electrical conductivity (mS/cm) of the agueous solutions of the dyestuff, with and without the electrolytes, show that with Na2SO4 up to 50 g/L in the solution of the dyestuff, electropotential and electrical conductivity rise linearly, with unsignificant variations among the dyestuffs tested, which gives a sure indication of how to control the dyeing process. Variations among the dyestuffs are rather high when NaCl is used, and even at 50 g/L sedimentation occurs with C.I.Reactive Blue 21. Higher degree of exhaustion, or adsorption of the dyestuff on cotton fibre, with Na2SO4 as an electrolyte, is in direct correlation with electropotential and electrical conductivity. Variations among the dyestuffs can be contributed to different chemical structure of individual dyestuffs.
Izvorni jezik
Engleski
Znanstvena područja
Tekstilna tehnologija
