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Degrees of dye exhaustion from the dyebath and the dye fixation ratio and the fixation yield

Degrees of dye exhaustion from the dyebath and the dye fixation ratio and the fixation yield

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Dyes with two monochlorotriazine or with two monochlorotriazine and two vinylsulphone reactive groups have been investigated for establishing an enhancement of the dyeability of cotton fabrics. The effect of the diamine bridge linking two chromophore systems on the degree of dye exhaustion from the dyebath and dye bonding with the cellulose fibre w...

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... results of dye exhaustion and fixation values were shown in Table 2. where: ...

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... This dyes class comprises highly colored organic compounds that have primary application in tinting textiles [1]. Reactive dyes can form a covalent bond with the cotton fiber [1,4], giving them the feature of having difficulty fading and a bright shade ranges [1,4]. Although reactive dyes are primarily employed for dying textiles, 15À50% of them are left hydrolyzed in the water-baths during the dying process [5]. ...
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... Matyjas i Rybicki su ispitivali primenu diamina, kao mosta za povezivanje, na iscrpljenje i fi ksiranje bifunkcionalnih reaktivnih boja na pamuku [8]. Utvrdili su da primena diamina, koja osigurava hemijski linearnu strukturu boja, utiče na poveć anje količine iscrpljene i fi ksirane bifunkcionalne boje sa monohlortriazinskom i vinil sulfonskom grupom. ...
... U pogledu razlike u tonu uzorci oznake R2 su više žuti (+DH * ), a uzorci oznake R3 su više plavi (-DH * ). Kao u predhodnom slučaju ukupna razlika u boji DE * je velika (7,(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18)8) i u slučaju bojenja u realnom sistemu zamena jedne boje drugom zahteva dopunske korekcije. U tabeli 7 prikazane su razlike u obojenju za seriju uzoraka obojnih reaktivnim plavim bojama. ...
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... Availability of 1,3,5-Tricholrotriazine and β-sulphatoethyl sulphone groups on the molecules of these dyes favors the covalent bond formation. In addition to triazinyl and vinyl sulphone systems, there are other hetero cyclic nitrogen ring systems with fluoro or chloro substituents at the carbon atom and ßsulphatoethyl sulphone which causes an electron deficiency in the terminal carbon atom [3,4]. Some other groups having a similar effect to the terminal carbon atom have also been exploited to confer the dye substantivity with cellulose. ...
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... General fixation rates for different dye classes[22]. ...
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Cellulose fiber is a tremendous natural resource that has broad application in various productions including the textile industry. The dyes, which are commonly used for cellulose printing, are "reactive dyes" because of their high wet fastness and brilliant colors. The interaction of various dyes with the cellulose fiber depends upon the physiochemical properties that are governed by specific features of the dye molecule. The binding pattern of the reactive dye with cellulose fiber is called the ligand-receptor concept. In the current study, the three dimensional quantitative structure property relationship (3D-QSPR) technique was applied to understand the red reactive dyes interactions with the cellulose by the Comparative Molecular Field Analysis (CoMFA) method. This method was successfully utilized to predict a reliable model. The predicted model gives satisfactory statistical results and in the light of these, it was further analyzed. Additionally, the graphical outcomes (contour maps) help us to understand the modification pattern and to correlate the structural changes with respect to the absorptivity. Furthermore, the final selected model has potential to assist in understanding the characteristics of the external test set. The study could be helpful to design new reactive dyes with better affinity and selectivity for the cellulose fiber.
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