Novel carboxylate comb‐like dispersant used in disperse dyes

He, Jingjing; Yan, Luo

doi:10.1002/app.52147

Cited by 20 publications

(10 citation statements)

References 37 publications

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“…Moreover, a large amount of alkali and sodium hydrosulfite is used in the reduction cleaning process to reduce the loose dye, which is adsorbed on the fiber surface. Therefore, water-based disperse dyeing and the reduction cleaning process produce a large amount of wastewater, which is not environmentally friendly [ 4 , 5 ]. Disperse dyeing effluent contains many chemicals containing carcinogens and mutagen chemicals such as disperse dye, dispersant, detergent, salts, etc., and causes serious environmental problems [ 6 , 7 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of Dispersant on Disperse Dyeing in Silicone Waterless Dyeing System

et al. 2023

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Traditional water-based dyeing of polyester textiles usually generates burdensome processes and a great deal of wastewater, which can no longer meet the green and sustainable developments in the textile dyeing industry. In the silicone waterless dyeing system, polyester textiles can be dyed with disperse dye without water. However, the dyeing performance of polyester textiles is influenced by the dispersant. In this study, the relationship between the properties of dispersants and disperse dyeing performance was studied. When the amount of dispersant NNO (2-Naphthalenesulfonic acid) was 1.2%, the exhaustion of disperse red 177 and the final K/S value of the dyed fabric improved to 94.18% and 14.73, respectively. However, the exhaustion of disperse red 177 was reduced from 90.73% to 82.61%, and the final K/S value of the dyed fabric was decreased from 14.77 to 14.01 when the dosage of MF (Naphthalenesulfonic acid) was 1.2%. Compared with different dyeing systems, the final uptake of disperse red 177 was 93.81% and 94.18% in traditional water-based and silicone waterless dyeing systems and the K/S value of the dyed fabric was almost the same. The washing and rubbing fastness (wet and dry) of the dyed fabric were found to be at a level of 4 or 4–5, and the light fastness of the dyed fabric was 3–4. If only the dispersant was added in the silicone waterless dyeing system, there was no leveling problems on dyed samples. Moreover, the maximum absorption wavelength of disperse red 177 was not changed after adding the dispersant. With an increasing amount of dispersant NNO, the solubility of the dye in the silicone solvent decreased, but it increased with an increasing amount of dispersant MF. In the relationship between dye exhaustion and dye solubility in a silicone waterless dyeing system, the exhaustion of dye was linearly and inversely proportional to the dye solubility. A dispersant with better hydrophilicity can decrease the solubility of the dye in dyeing media, and the dyeing performance of dye is better. Compared with previous studies, the exhaustion of dye was consistent with the ClogP value (hydrophobic constant) of the dyeing accelerant. Therefore, a dispersant with high hydrophilicity can reduce the solubility of dye and improve the exhaustion of disperse dye in a silicone waterless dyeing system. Moreover, the color fastness of the dyed fabric did not change before and after adding the dispersant.

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Section: Introductionmentioning

confidence: 99%

Effect of Dispersant on Disperse Dyeing in Silicone Waterless Dyeing System

et al. 2023

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“…[8][9][10] In recent years, the application of polycarboxylate comb-like dispersants for the dispersion of pigments and dyes has attracted a lot of attention in the field of science and technology. [11][12][13][14][15] According to the adsorption and dispersion mechanism of dispersants, the structure and composition of polycarboxylate comb-like dispersants such as the molecular weight, side chain length and density will have important effects on the dispersion efficiency. 10,[16][17][18] Gharanjig et al 10,18 prepared comb-like carboxylate dispersants with different molecular weights and side chain densities by copolymerization method.…”

Section: Introductionmentioning

confidence: 99%

Synthesis ofSMA‐PEGhyperdispersant and its stabilization mechanism for carbon black

Kang

Zhu

2023

J of Applied Polymer Sci

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In this paper, four comb hyperdispersants (SMA-MPEGA) with different side chain lengths and side chain densities were prepared by the amide coupling reaction of styrene-maleic anhydride (SMA) copolymer and methoxypolyethylene glycol amine (MPEGA). The dispersion behavior of SMA-MPEGA on carbon black was investigated by rheology and water contact angle measurement. The combined technologies of transmission electron microscopy, digital light synthesis, zeta potential, surface tension and UV-Vis have been successfully used to reveal the stability mechanism of SMA-MPEGA. The SMA3000-MPEGA1000 with a molar ratio of styrene to maleic anhydride of 3:1 and the molecular weight of side chain PEG of 1000 has the optimum carbon black dispersion. The results of the effect of dispersant structure on its dispersion performance reveal that the stable adsorption of dispersant on the surface of carbon black is the key to obtaining a space or electrostatic repulsion stabilizing role.

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“…Disperse dyes are an important class of dyes especially used for dyeing polyester, as well as other chemical fibres and fabrics; they do not contain water‐soluble groups in the molecular structure and often exist as prepolymers, exhibiting nonionic properties with extremely low solubility in water 1,2 . During the dyeing process, a large number of chemicals such as dispersants and anti‐sediment agents must be added so that the dyes can be stably dispersed in the solution or colourant before they can be used 3–5 . However, the commonly used dispersants are methyl naphthalene sulphonic acid/formaldehyde condensate and sodium lignosulphonate, which cause a dramatic increase in chemical oxygen demand in water and difficulties in treating sewage because it is difficult to remove the dispersant 6 .…”

Section: Introductionmentioning

confidence: 99%

“…1,2 During the dyeing process, a large number of chemicals such as dispersants and anti-sediment agents must be added so that the dyes can be stably dispersed in the solution or colourant before they can be used. [3][4][5] However, the commonly used dispersants are methyl naphthalene sulphonic acid/formaldehyde condensate and sodium lignosulphonate, which cause a dramatic increase in chemical oxygen demand in water and difficulties in treating sewage because it is difficult to remove the dispersant. 6 To reduce the amount of dispersant, some researchers applied ultrasonic waves before dyeing or during the dyeing process to destroy the aggregation based on the acoustic cavitation effect and decrease the particle size, thereby promoting the dissolution and dispersion of disperse dyes and improving the dyeing performance.…”

mentioning

confidence: 99%

A novel and eco‐friendly approach for dyeing polyester fabrics by liquid disperse dyes treated with deep eutectic solvent

Zheng

Sun

et al. 2023

Coloration Technology

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Disperse dyes do not contain water‐soluble groups and are difficult to dissolve in water, so they cannot be directly formulated into dyeing liquor. In the current dyeing process, the solubility of disperse dyes is mainly improved by adding dispersants. However, dispersants are not absorbed by fibres and survive in the dyeing effluent, aggravating the pollution of water bodies and causing difficulties in treatment. Therefore, the development of a novel, eco‐friendly dyeing approach is important to overcome these problems. Herein, for the purpose of improving the solubility of disperse dyes and reducing the dosage of dispersants, a deep eutectic solvent consisting of choline chloride/ethylene glycol was employed instead of dispersant to dissolve CI Disperse Blue 79 and CI Disperse Red 343, thus forming liquid disperse dyes. The results show that both CI Disperse Blue 79 and CI Disperse Red 343 were well dissolved in choline chloride/ethylene glycol with excellent stability, and the dissolution behaviour was strongly associated with the dissolution temperature and time. Moreover, polyester fabrics can be dyed successfully with liquid disperse dyes, and it was observed that the K/S value and rubbing fastness were evidently improved at the same dyeing temperature with unchanged colour characteristics, and a higher K/S value could still be obtained by lowering the dyeing temperature. This work establishes a green dyeing process, which reduces dyeing costs and meets the demand for environmental protection. It is also expected to realise the liquid state of disperse dyes, which will help to promote the further development of textile dyeing.

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Novel carboxylate comb‐like dispersant used in disperse dyes

Cited by 20 publications

References 37 publications

Effect of Dispersant on Disperse Dyeing in Silicone Waterless Dyeing System

Effect of Dispersant on Disperse Dyeing in Silicone Waterless Dyeing System

Synthesis ofSMA‐PEGhyperdispersant and its stabilization mechanism for carbon black

A novel and eco‐friendly approach for dyeing polyester fabrics by liquid disperse dyes treated with deep eutectic solvent

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