The roles of polymer relaxation phenomena, aqueous dye …
Corresponding Author. Stephen M. Burkinshaw. [email protected]; University of Leeds, Leeds, UK. Correspondence. Stephen M. Burkinshaw and K. Liu
Special color change mechanism of Disperse Red 60 in …
Abstract. Color Intex (C.I.) Disperse Red 60 is a bright red anthraquinone dye, but it is easy to produce dyeing defects (a kind of discoloration phenomenon, the partial color is random blue patches) in the polyester dyeing process, and the mechanism of blue patches is unknown, resulting in a low right-one-time of dyeing.
Synthesis, characterization, and application of …
Most disperse dyes belong to the category of azo dyes, which can generate a wide range of molecular com- binations by varying the diazo and coupling components and provide a …
A Comprehensive Review on the Synthesis and …
Disperse dyes based on the pyridone moiety can be formed from β-diketones and different diazonium salts, followed by condensation with cyanoacetamide …
Textile Knowledge : Dyeing mechanism of disperse dye
The dyeing of hydrophobic fabric with disperse dyes may be considered as a process of dye transfer from a liquire solvent ( water ) to a solid organic solvent (fibre). Disperse dyes are added to water with a surface active agent to form an aqueous dispersion. The insolubility of disperse dyes enablethem to leave the dye liquor as they are more ...
Synthesis of Azo Disperse Dyes with High Absorption …
Disperse dyes composed of nonionic monoazo functional group and anthraquinone subunit as chromophore are widely regarded as excellent dyeing agents and are commonly synthesized from a diazonium salt and coupling intermediate [23]. Significantly, numerous azo disperse dye possesses an hydrazyl (–N=N–) group that …
Alkali resistance mechanism of cyano-containing heterocyclic disperse dyes
Gao et al. [12] designed an azo dye with a hydrolyzable cyano group, which can achieve an alkali resistance of 5 g/L NaOH despite the presence of the hydrolyzable group in its structure. However, the mechanism of alkali resistance of disperse dyes containing easily hydrolysable groups is still unclear [ 13, 14 ].
Improved Dyeing Performance of Blue Disperse Dyes with N …
Traditional commercial anthraquinone dyes and azo blue disperse dyes generally have high solubility in decamethylcyclopentasiloxane (D5) non-aqueous media dyeing system, which leads to low dyeing uptake. One way to improve dyeing uptake is by adjusting the molecular structure of the dyes to change their solubility. Herein, the …
Effect of dye structure on color removal efficiency by coagulation
However, disperse black dye exhibited a lower color removal efficiency than the rest. All the disperse dyes have same main structure with azo chromophores and auxochromes (–OH and –Cl). The –OH auxochromes in all the four disperse dyes form Mg(OH) 2, which acts through an adsorptive coagulation mechanism. Disperse red, …
Special color change mechanism of Disperse Red 60 in
Abstract. Color Intex (C.I.) Disperse Red 60 is a bright red anthraquinone dye, but it is easy to produce dyeing defects (a kind of discoloration phenomenon, the partial color is random blue ...
Disperse Dye
Disperse dyes. M.L. Gulrajani, in Handbook of Textile and Industrial Dyeing, 2011 10.4 Properties of disperse dyes 10.4.1 General. Disperse dyes are usually sold as powders, which are prepared by milling the press cake with an equal weight of a suitable auxiliary product and a little water, drying, and then mixing with diluents to give a product …
Disperse Dyes: Properties, Classification, Dyeing
Dyeing Mechanism of Disperse Dye The dyeing of hydrophobic fibres like polyester fibres with disperse dyes may be considered as a process of dye transfer from liquid solvent (water) to a solid organic solvent (fibre). Disperse dyes are added to water with a surface active agent to form an aqueous dispersion. The insolubility of disperse …
The roles of polymer relaxation phenomena, aqueous dye …
The temperature dependent uptake of a commercial disperse dye on cotton and polyamide 66 fabrics at dyeing temperatures between 30°C and 130°C adhered to the Williams–Landel–Ferry equation, insofar as, very good correspondence was observed between plots of experimentally determined colour strength data points (log1/f k) and the …
Effect of molecular composition of comb-like …
The turbidity drop is probably because of dye agglomeration and sedimentation. As a consequence, the suspensions with a lower particle concentration display lower values for turbidity. ... Preparation and interaction mechanism of Nano disperse dye using hydroxypropyl sulfonated lignin. Int. J. Biol. Macromol., 152 (2020), …
Alkali resistance mechanism of cyano-containing heterocyclic disperse dyes
Dyes containing cyano group have the advantages of bright colours and high molar absorption. However, most cyano-containing disperse dyes are not used for alkaline dyeing as they are easily hydrolysed under alkali conditions. Herein, cyano-containing disperse dyes for alkaline dyeing were designed by introducing non-hydrolysable …
Disperse dye
Disperse Red 9 is a red dye derived from anthraquinone. Disperse Red 11, also called C.I. 62015 and 1,4-diamino-2-methoxy anthraquinone, is another anthraquinone dye. Disperse Red 60 is also an anthraquinone dye. Disperse Yellow 26 is a yellow disperse dye. Disperse Yellow 42 is prepared by the reaction of two equivalents of aniline with 4 ...
Distribution mechanism of disperse dyes with similar …
1. Introduction. Disperse dyes are the dyes commonly used for dyeing synthetic fibers currently, especially the polyester fabrics. As we all know, single molecules and aggregates of disperse dyes are two dynamic states in dyeing process [1].So, dye …
Preparation and interaction mechanism of Nano disperse dye …
Qin et al. 58 studied the interaction mechanism between lignin derivative dispersants and dyes using QCM with dissipation monitoring and atomic force microscopy (AFM). With the increase of the ...
Preparation of Ultrafine Disperse Dyes Based on the …
The agglomeration of some dyes and the antigrowth phenomenon of particle diameters were triggered by the abovementioned reasons of curve tailing, double …
Mechanism of Dyeing with Acid Dyes
Acid dyes are not transferred from bath to fiber below 39°C. Milling acid dyes have a minimum temperature of exhaustion at 60°C, but at 70°C, transfer of dye is fast. Super-milling dyes cause level dyeing only at boil. Mechanism of Dyeing with Acid Dyes: Dissolution of dyes in aqueous solvent, produces a colored anion,
Synthesis, spectroscopic characterization and dyeing …
The exhaustion percentage (%E) of the disperse dyes 3–7 by PE-F in H 2 O was optically calculated by measuring the concentration of dye bath before (C 1) and after (C 2) dyeing ...
Preparation and interaction mechanism of Nano …
2.4. Preparation of nano disperse dye. 100 ml of 10.0 g·L −1 dye-acetone solution was prepared firstly by dissolving dried disperse dye into acetone. Then the …
Synthesis, characterization, and application of novel …
Most disperse dyes belong to the category of azo dyes, which can generate a wide range of molecular com- binations by varying the diazo and coupling components and provide a high color gamut 21–23 .
Study on the dispersion mechanism of the polycarboxylic …
1. Introduction. The solubility of disperse dyes in water is low. In the disperse dyeing process for synthetic fibers, adding the dispersants can maintain the dispersion stability of the dyes in water and ensure that the dyes can be stably adsorbed to the fiber surface in the form of nano-dispersed particles.
Dispersing Agent: Functions, Trade Names and Examples
A dispersing agent is a non-ionic surfactant such as an alkyl-polyethyleneglycol. These are used to impart the leveling effect as well as to keep the dye in dispersed form, to avoid the dye aggregation and precipitation. It helps to increase dye solubility. Generally naphthalene sulphonic acid– formaldehyde condensate, lignin …
The stability of disperse red/reactive-red dye inks
Abstract. CI disperse red 896 was used as a representative disperse red dye to investigate the stability of inkjet colour paste. Various additives were added to the dye in different mass fractions to study the thermal stability and freeze–thaw stability of the ink in terms of average particle size, viscosity, and surface tension. The ...
Alkali resistance mechanism of cyano-containing heterocyclic disperse dyes
Alkali-resistant disperse dyes have garnered significant interest due to their numerous advantages in alkaline one-bath dyeing procedures. Herein, six cyano-based disperse dyes (D1–D6) with either 2-aminobenzothiazole or 2-amino-6-nitrobenzothiazole, as well as N-substituted anilines as coupling components, were designed and …
Dyeing with Disperse Dyes
Fig. 5. Some typical azo disperse dye structures. 2.1.2 Anthraquinone disperse dyes Anthraquinone disperse dyes were among the early acetate dyes and have made an important contribution to the violet and blue shade range. They prod uce bright dyeings of excellent light fastness and cause no dye stability problems during dyeing.
Disperse Dye for Polyester
Part 1 : Disperse Dye for Polyester | Why called disperse dye | Application and mechanism Part 3 : Auxilaries Of Disperse Dye Why called disperse dye. Disperse dye are the smallest dye of all dyes. They are insoluble in water. When they are applied to the dye bath, they form dispersion.They are free from ionized group.So …
Stabilization mechanisms of C.I. Disperse Red 60 …
Color Intex (C.I.) Disperse Red 60 is a bright red anthraquinone dye, but it is easy to produce dyeing defects (a kind of discoloration phenomenon, the partial color is random blue patches) in the ...