Artículos de revistas: "Dyes and dyeing"

1

Huang, Yuan Li, Bing Du, Ye Fang, Yu Ping Zhao, Ruo Yuan Song y Lai Jiu Zheng. "Mixed Reactive Disperse Dyes on Wool Yarn Dyeing in Supercritical CO₂". Advanced Materials Research 627 (diciembre de 2012): 217–20. http://dx.doi.org/10.4028/www.scientific.net/amr.627.217.

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Mixed reactive disperse dyes is adopted to dye wool yarn by supercritical CO2 dyeing equipment, and the influencing factors on the wool yarn uptake are analyzed including dyeing temperature, dyeing time, dyeing pressure. The results reveal the interaction relationship between single dyes dyeing on the wool yarn: the total uptake of mixed reactive disperse dyes and the uptake of single reactive disperse dyes increase with the increasing of temperature and pressure, it also increase by the extension of time. In the same conditions, the total uptake of mixed reactive disperse dyes is more than the uptake of single reactive disperse dyes. The uptake of single reactive disperse dyes in the mixed dyes is less than the uptake of single reactive disperse dyes. In the dyeing process of mixed dyes, the wool yarn dyeing of two dyes has selective and competitive. Both color fastness to rubbing and color fastness to washing of dyed wool yarn are in line with national institute of standards.

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2

Jangwan, J. S., Maneesha Dobhal y S. C. Sati. "Dyeing of wool and cotton fibres with fruit rind of Juglans regia as natural dyes, and standardization of ancient dyeing procedure". Environment Conservation Journal 8, n.º 3 (24 de diciembre de 2007): 35–38. http://dx.doi.org/10.36953/ecj.2007.080310.

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Vegetable dyes and their uses are known in an cient time more than 2000 years ago. It was found that the discovery of synthetic dyes reduce the use of natural dyes and consequently the export of same was affected in large extent. However due to non toxic nature, eco-friendly behaviour and properties to impart variety of colours once again natural dyes are getting more attention of chemists and dyers. The present paper deals with optimization of dyeing and mordanting of wool and cotton samples with fruit rind of Juglans regia and standardization of ancient dyeing procedure and also the fastness studies of dyed samples toward light and washing.

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3

Meng, Chun Li, Yan Wei Wang y Ji Liang Cao. "Dyeing of Polyester/Cotton Blends with Encapsulated Disperse/Reactive Dyes for a One-Bath Auxiliary-Free Process". Advanced Materials Research 441 (enero de 2012): 61–65. http://dx.doi.org/10.4028/www.scientific.net/amr.441.61.

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Research onthe one-bath dyeing process of encapsulated disperse dyes and reactive dyes on polyester/cotton blends showed that through the suitable modification before dyeing, polyester/cotton blends could be dyed with encapsulated disperse/reactive dyes in an auxiliary-free, one-bath method. The dyed goods attained excellent levelness and fastness. The residual dye in the final baths were very low. Thus, cleaner dyeing production and environment protection can be realized.

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4

Bigambo, Pendo, Happiness Wellah, Hadija Ngaga, Safina Kimbokota y Mbonea Mrango. "Turmeric Dyeing of Cotton Fabrics using Tie-Dyeing Techniques". Tanzania Journal of Science 49, n.º 5 (31 de enero de 2024): 1064–78. http://dx.doi.org/10.4314/tjs.v49i5.11.

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Tie-dyeing is a resist-dyeing technique which for years has been used by SMEs to produce attractive textile fabrics. However, the technique is challenged by the use of synthetic dyes which are not environmentally friendly and the growing consumers’ environmental awareness. Accordingly, researchers and industrialists are forced to explore the alternative natural dyes in response to the above challenges. Among the natural source of dyes available abundantly in Tanzania, but are yet to be fully exploited for applications via tie-dyeing technique are turmeric (Curcuma longa L.) roots commonly used for food coloring. In this study turmeric roots were investigated for their potential as dyes for coloration of cotton fabrics through tie-dyeing technique. Turmeric dyes were extracted through boiling of powdered turmeric roots in water followed by filtering the mixture, and applying it to a pre-mordanted and tied fabric. For analysis purposes, un-tied (plain) cotton fabric was also dyed following the same procedure. The findings of this study suggests that, turmeric dyes can be applied on cotton using tie-dyeing technique and produce golden-yellow color on fabrics. Additionally, pre-mordanting of cotton increased the color depth of dyed materials while improving their fastness properties with respect to washing and both wet and dry rubbing.

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5

Yu, Yingjie y Rencheng Tang. "Dyeing of Tussah Silk with Reactive Dyes: Dye Selection, Dyeing Conditions, Dye Fixation Characteristics, and Comparison with Mulberry Silk". Molecules 29, n.º 5 (5 de marzo de 2024): 1151. http://dx.doi.org/10.3390/molecules29051151.

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Tussah silk is one of the most widely used wild silks. It is usually dyed with acid dyes, despite the shortcoming of poor wet fastness. Reactive dyeing is a good solution to this problem. In our work, sulfatoethylsulfone (SES), sulfatoethylsulfone/monochlorotriazine (SES/MCT), monochlorotriazine (MCT), and bis(monochlorotriazine) (Bis(MCT)) dyes were used to dye tussah silk. All of these dyes showed lower exhaustion and fixation on tussah silk than on mulberry silk under alkaline conditions. Among them, SES dyes were more applicable, with a fixation of 70–85% (at 4%owf dye) at 90 °C when using sodium bicarbonate as an alkali. SES dyes also showed a rapid fixation speed. The dyeing of tussah silk required lower sodium bicarbonate dosage, the use of more neutral electrolytes, and a higher dye quantity to achieve deep effects compared to mulberry silk. Dyed tussah silk displayed lower apparent color depth and brilliance than dyed mulberry silk. The neutral boiling dyeing of tussah silk with SES dyes exhibited higher exhaustion, higher fixation (82–92% at 4%owf dye), and a slower fixation speed compared with alkaline dyeing. Furthermore, in this dyeing method, SES dyes showed higher and more efficient fixation on tussah silk than on mulberry silk. All dyed tussah silk had excellent color fastness to soaping.

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6

Zheng, Laijiu, Huanda Zheng, Bing Du, Ju Wei, Shihui Gao y Juan Zhang. "Dyeing Procedures of Polyester Fiber in Supercritical Carbon Dioxide Using a Special Dyeing Frame". Journal of Engineered Fibers and Fabrics 10, n.º 4 (diciembre de 2015): 155892501501000. http://dx.doi.org/10.1177/155892501501000414.

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Supercritical CO2 fluid dyeing, a new type of anhydrous dyeing technology, has the advantage of high uptake rate, short dyeing process, recycling of dyes and CO2, and zero discharge. This study investigated a dyeing technique of loose fibers using supercritical CO2 as solvent to replace water. Based on the existing characteristics of the self-developed supercritical CO2 dyeing equipment, a special dyeing frame of loose fibers was designed. Using the dyeing frame and inner and outer dyeing processes, polyester fibers were dyed with disperse red 153# maternal dyes at temperatures of 80–140?, pressures of 17–29MPa and time of 20–80min, respectively. The experimental results revealed that the dyeing performance of fibers was good on the dyeing frame, as well as with a favorably increased temperature, pressure and time. Dyeing temperature had a strong influence on the color yield. The dyeing results were compared with those of polyester fibers dyed with disperse red 153# dyes. With the special dyeing frame of loose fibers, color fastness to washing and artificial light was generally similar to conventional aqueous medium methods.

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7

Liu, Jin Qiang, Hua Li Miao y Shen Zheng Li. "Non-Aqueous Dyeing of Reactive Dyes in D5". Advanced Materials Research 441 (enero de 2012): 138–44. http://dx.doi.org/10.4028/www.scientific.net/amr.441.138.

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C.I. Reactive Red 195 was used for non-aqueous dyeing in D5 (Decamethyl Cyclopentasiloxane) and appropriate surfactants were selected to ensure the dyes dispersed stably in D5 medium. The feasible method for reactive dyeing in dyes/D5 suspension system was established through repeated experiments. At the same time, taking the color depth (K/S value) as the evaluation index, the process factors in dyeing such as temperature, dyeing duration, pick-up ratio of alkali solution on fabric, as well as the alkali concentration were optimized for setting up dyeing conditions. The results showed that, the dye up-take could reach nearly 100% without any salt as accelerating agent. Since just a little water was used in the process, hydrolysis of reactive dyes was restrained, fixing rate was increased, and the apparent color depth of the dyed sample was much better than traditional water bath dyeing. The washing fastness and rubbing fastness of samples dyed in dyes/D5 system were satisfactory.

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8

Zhang, Hong Jie, Zhi Li Zhong, Li Li Feng y Xiao Ping Quan. "Research on Polypropylene Dyeing in Supercritical Carbon Dioxide". Advanced Materials Research 175-176 (enero de 2011): 646–50. http://dx.doi.org/10.4028/www.scientific.net/amr.175-176.646.

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Polypropylene fibers were dyed with Disperse dyes Blue 2B in Supercritical Carbon Dioxide at different temperature, pressure and time. The K/S value were determined and the effect of as temperature, pressure and dyeing time on the dyeing behaviours of disperse dyes on Polypropylene fibers were discussed. It was found that with the increase of dyeing temperature and pressure, the K/S value increased gradually, and dyeing effect was best after the fiber was dyed at 120 °C, 28 MPa for 20 min.

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9

Toprak, Tuba y Pervin Anis. "Dyeing properties of orgonobase-induced poly(ethylene terephthalate) fabric". Textile Research Journal 90, n.º 23-24 (21 de mayo de 2020): 2658–73. http://dx.doi.org/10.1177/0040517520922946.

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Polyester is the most used of the synthetic fibers used in the textile industry. Nonetheless, due to its structure, the use of only disperse dyes for dyeing creates a significant weakness in its coloring. In this paper, the utilization of reactive and acid dyes in the dyeing of polyester after chemical modification with guanidine-based polymer is investigated. The dyeing of poly(ethylene terephthalate) (PET) fabrics with reactive and acid dyes was succeeded via modification with guanidine-based polymer. The effects of this polymer on disperse dyeing were also investigated. The effect of various parameters such as temperature, duration, pH, different amounts of salt and alkaline, the different dyes and processes were investigated for modifying and dyeing PET. The optimum parameters for reactive dyeing were found to be modification and dyeing in the same bath at 100° C for 60 minutes without salt and alkaline, for which the obtained color strength (12.87) was higher than that of conventional disperse dyeing with carrier (10.43). In addition, polymer modification at 130° C for 60 minutes before disperse dyeing provided higher color depth (24.39) than dyeing of PET by the conventional disperse high temperature method (22.48). Color fastness in laundering and the perspiration of modified and reactive dyed fabrics reached good to excellent levels (4/5). The modified and dyed samples were characterized using Scanning Electron Microscopy and Fourier Transform Infrared. Tensile tests and flexural rigidity tests for modified and reactive dyed samples were also conducted. The results indicate that the quality of the beginning material was not degraded after being modified and dyed.

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10

Cui, Shuling. "Structure and dyeing properties of jade fibre". Pigment & Resin Technology 43, n.º 3 (29 de abril de 2014): 139–44. http://dx.doi.org/10.1108/prt-08-2013-0071.

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Purpose – Based on clarifying the structural difference between jade fibre and general polyester fibre, this paper aims to study the dyeing properties and dyeing adsorption mechanism of jade fibre with disperse dye and cationic dye. Design/methodology/approach – The chemical structure and microstructure of jade fibre were briefly explained comparing with ordinary polyester fibre. The dyeing rate curve and dyeing adsorption isotherm of disperse dyes and cationic dyes on jade fibre were, respectively, studied. The dyeing uptake, dyeing absorption mechanism, and the main dyeing process parameters were proposed. Findings – Jade fibre can be dyed with cationic dye and disperse dye. The suitable exhaust dyeing process is 110°C and 40 minutes for disperse dye, 100°C and 60 minutes for cationic dye. The dyeing uptake on jade fibre with both disperse dyes or cationic dyes is much higher than that on general polyester fibre and acrylic fibre, and the dyeing adsorption mechanism belongs to the combination of Langmuir and Nernst adsorption for disperse dyes and Langmuir adsorption for cationic dyes. Comparing with ordinary polyester fibre, jade fibre has the advantage of low temperature dyeing and reduced effluent, as is significant to energy-saving and emission reduction. Originality/value – Jade fibre is a new type of modified polyester fibre with the function of health protection and energy conservation. There are little technical data in the literature at present about the dyeing property of jade fibre.

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11

Zhu, Zhao Yu, Lai Jiu Zheng, Bing Du, Ju Wei, Yong Fang Qian y Jun Feng Sui. "Study on Alizarin Dyes on Polyester-Cotton Knitted Fabrics Dyeing in Supercritical CO₂". Advanced Materials Research 821-822 (septiembre de 2013): 556–59. http://dx.doi.org/10.4028/www.scientific.net/amr.821-822.556.

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Using natural alizarin dyes to dye polyester - cotton65/35 knitted fabric in supercritical CO2dyeing equipment, and analysis the influencing parameters including dyeing temperature, time and pressure. The parameters are optimized as following: dyeing temperature 115.21°C, dyeing time 71.42 min and dyeing pressure 26.22 Mpa. Adopting alizarin dyes to dye polyester-cotton65/35 knitted fabrics in supercritical CO2could obtain a good dyeing effect, and the color fastness to rubbing and color fastness to washing of dyed fabrics meet The National Standard (GB18401-2003).

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12

Wang, Guang Ming, Lan Zhou, Jun Li Chen, Guang Jie Cheng y Zhong Fa Hu. "Study on One-Bath Dyeing Technology and its Application for Disperse/Reactive Dyes on Polyester/Viscose Blended Fabrics". Advanced Materials Research 441 (enero de 2012): 116–21. http://dx.doi.org/10.4028/www.scientific.net/amr.441.116.

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In order to shorten dyeing process, increase yield and reduce consumption of water and alkaline, the one-bath two-stage heating dyeing process was used for reactive/disperse dyes. The key technology of this research was adding alkaline when polyester/viscose (cotton) blended fabrics were dyed by reactive dyes,and then adding acetic acid when dyed by disperse dyes. During this process, acetic acid and alkali neutralize, and sodium acetate and acetic acid form a buffer system, which greatly improves dyeing reproducibility. The results of factory trial showed that color strength and color fastness of polyester/viscose (cotton) blended fabrics dyed by this process were as same as those achieved by the traditional process.

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13

Liu, Kai Qiang, Yan Lian Rui y Guo Qiang Chen. "Dyeing of Silk/PLA Mixture with Reactive Dyes". Advanced Materials Research 239-242 (mayo de 2011): 1739–42. http://dx.doi.org/10.4028/www.scientific.net/amr.239-242.1739.

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Silk/PLA mixture is a new textile material, and it combines the outstanding characteristics of silk and PLA fibers. During the wet process, this mixture is subjected to some problems owing to the poor resistance of PLA fiber to alkali. The silk component in this mixture can be dyed with acid dyes under acidic condition, and with reactive dyes under alkaline condition. In the present work, silk/PLA mixture was dyed with Everzol ED reactive dyes in the case of the use of sodium carbonate and sodium bicarbonate as alkalis for the fixation of dyes. The alkali dosage and dyeing temperature on the uptake of dyes by this mixture were discussed. Also, the dyeing rates, building-up properties and color fastness of reactive dyes were determined. It was found that Everzol ED reactive dyes exhibited good dyeing properties for silk/PLA mixture under weakly alkaline condition in the presence of sodium bicarbonate.

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14

Tang, Bing Tao, Wen Tao Wang, Jin Jing Qiu, Jian Huang y Shu Fen Zhang. "Synthesis and Performances of Crosslinking Polymeric Dyes". Applied Mechanics and Materials 752-753 (abril de 2015): 90–97. http://dx.doi.org/10.4028/www.scientific.net/amm.752-753.90.

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Development of dyes with high fixation and salt-free dyeing process for cotton and silk is essential for the textile industry due to ecological and economical reasons. In this study, the synthesis of novel crosslinking polymeric dyes and its salt-free crosslinking dyeing method are described, and cotton and silk have been effectively dyed with the novel dyes. Excellent dye fixation of over 99% on silk and over 97% on cotton, were achieved in a padding process in the salt-free condition. The dyes showed excellent wet fastness values equal to those observed for the standard reactive dyeing.

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15

Fu, Zhong Jun, Hao Fei Huang, Lu Shan Yu y Yun Fei Sun. "DSC Studies on the Dyeing Properties of PLA Fiber". Advanced Materials Research 750-752 (agosto de 2013): 1393–96. http://dx.doi.org/10.4028/www.scientific.net/amr.750-752.1393.

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The dyeing properties of the polylactic acid (PLA) fiber with four different disperse dyes was studied. In the disperse dyeing process, differential scanning calorimeter (DSC) analysis was applied to test and analyze the changes of the glass-transition and melting temperature of the dyed and pure PLA fiber. The results indicated that not only the structure of the dispersed dyes and the dyeing conditions affected the dyeing performance of PLA fiber, but also the degree of the crystallinity of PLA fiber contributed to the final dyeing results. Moreover, the transformation of such crystallinity during the disperse dyeing process should be taken into account when the dyeing temperature was studied.

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16

Shen, De Jun y Yan Fei Zhang. "Research on Fast-Growing Poplar Dyeing Technology Based on Material Properties". Applied Mechanics and Materials 730 (enero de 2015): 151–55. http://dx.doi.org/10.4028/www.scientific.net/amm.730.151.

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By exploring the acid yellow G to buck dyes dyeing was carried out on the fast-growing Yang path of material。Through orthogonal test to determine the optimum technology of dyeing;Test results are as follows。Dyed with acid dyes, test optimization process is dye mass fraction is 0.3%, dyeing time for 4 days, penetrating agent mass fraction is 0.05%, the dye solution pH value of 5.2.。

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17

Ma, Xiaofei, Yujuan Wei, Shuo Wang, Xin Zuo y Baolei Shen. "Sustainable ultrasound-assisted ultralow liquor ratio dyeing of cotton fabric with natural turmeric dye". Textile Research Journal 90, n.º 5-6 (1 de octubre de 2019): 685–94. http://dx.doi.org/10.1177/0040517519878793.

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Natural dyes are environmentally friendly and have become important alternatives to synthetic dyes in some dyeing products. Therefore, better extraction and dyeing techniques need to be developed for the dyeing process of natural dyes. In this work, cotton fabric was dyed using turmeric extraction solution under an ultralow liquor ratio (materials to liquor ratio of 1:5) and ultrasonic-assisted conditions. Dye extraction using different dispersants and pH values has been investigated and three-factor-three–level Box–Behnken design was employed to explore the dyeing conditions. It was found that sodium dodecyl sulfate systems and ultrasonic waves can effective improve the dyeing depth under neutral condition. The K/ S value can reach 2.53 with ultrasonic power of 200 W, dyeing time of 30 min and temperature of 40℃. Scanning electron microscope images showed that the application of ultrasound did not cause obvious fiber damage. The developed technique could be used in the textile industry to make dyeing cotton fibers with natural dyes more sustainable than it is at present.

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18

Atav, Riza, Elçin Güneş, Deniz İzlen Çifçi y Yalçın Güneş. "Comparison of Wool Fabric Dyeing with Natural and Synthetic Dyes in View of Ecology and Treatability". AATCC Journal of Research 7, n.º 6 (1 de noviembre de 2020): 15–22. http://dx.doi.org/10.14504/ajr.7.6.3.

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The aim of this study was to compare the fastness properties and wastewater quality in obtaining the same color on 100% woven wool fabric with natural (madder) and synthetic (1:1 metal complex) dyes. The same color, with similar wet fastness properties, was obtained on the wool fabric when dyed with either dye. On the other hand, conductivity, chemical oxygen demand (COD), and the ammonia nitrogen (NH3-N) content of dyeings carried out with the synthetic dye mixture were considerably higher than dyeing with madder root extract, and its pH was more acidic. However, the amount of volatile suspended solids and color obtained in natural dyeing was higher than the amount in the synthetic dyeing wastewater.

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19

Sampaio, S., C. Martins y Jaime R. Gomes. "Colored Nanoparticles for Ecological Dyeing of Cellulosic Fibres". Advanced Materials Research 332-334 (septiembre de 2011): 1136–39. http://dx.doi.org/10.4028/www.scientific.net/amr.332-334.1136.

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Dyeing cellulosic fibres with reactive dyes wastes great quantities of salt and water. The objective of this work is to dye cellulosic fibers using colored nanoparticles (CNPs) as an alternative to dyeing with reactive dyes, without salt and without washing off at the end of dyeing. Samples of cotton were dyed by exhaustion with CNPs at medium to dark colours. Build-up of colour compared to samples from previous work is given and shows a big improvement. Washfastness results are given. Washing-off after dyeing was not necessary for the red and yellow colours. The blue colour needs some washing off since the fastness is lower than for the other colours even though soaping is not necessary, saving energy and time relative to dyeing with reactive dyes.

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Eren, Semiha y İrem Özyurt. "Waterless Dyeing of Polyamide 6.6". Polymers 16, n.º 11 (22 de mayo de 2024): 1472. http://dx.doi.org/10.3390/polym16111472.

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Waterless dyeing of polyamide 6.6 using scCO2 (supercritical carbon dioxide) was investigated. PA (polyamide) fibers can be dyed with various dyes, including disperse dyes. The conventional aqueous dyeing process uses large amounts of water and produces polluted water. Considering these environmental issues, waterless dyeing of fibers is a forefront issue, and utilization of supercritical carbon dioxide (scCO2) is a commercially viable technology for waterless dyeing. This study tested PA6.6 (polyamide 6.6) dyeing in scCO2 at 100 °C 220 bar pressure for 45 min. Color measurements and color fastness tests were performed, as well as tensile strength, scanning electron microscope (SEM) analysis, and Fourier transform infrared spectroscopy (FTIR) analysis. PA6.6 fabrics yielded higher K/S (color strength, the Kubelka–Munk equation) values with larger molecular weight dye and almost the same color strength with medium and small-sized dyes, demonstrating the ability of dyeing in a supercritical environment without water as a more environmentally friendly dyeing option compared to conventional dyeing.

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21

Li, Wang, Yang, Liu y Guo. "Preparation and Characterization of Dyed Corn Straw by Acid Red GR and Active Brilliant X-3B Dyes". Materials 12, n.º 21 (24 de octubre de 2019): 3483. http://dx.doi.org/10.3390/ma12213483.

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Corn straw is a kind of biomass material with huge reserves, which can be used in plate processing, handicraft manufacturing, indoor decoration, and other fields. To investigate the dyeing mechanism of corn straw with different dyes, corn straw was pretreated and dyed with Acid Red GR and Brilliant Red X-3B. The dyeing properties and light resistance of the two dyes were analyzed by dyeing rate, photochromaticity, FTIR, SEM, and water-washing firmness. The results showed that the structure and stability of the dyes were the main factors which influenced fading. A bleaching pretreatment could remove the waxiness of the corn straw epidermis and increase the porosity on the surface of the straw, which accelerated the photochromic coloring of the corn straw skin. The corn straw dyed with both dyes had good light resistance, but the straw dyed with Reactive Brilliant Red X-3B had higher dyeing rate, brighter color, and higher photochromaticity than the straw dyed with Acid Red GR. FTIR and water-washing firmness showed that Acid Red GR mainly bound to lignin, while Reactive Brilliant Red X-3B mainly bound to cellulose, hemicellulose, and lignin in corn straw through covalent bonds, which increased the coloring rate.

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Ashraful Alam, Zakaria Ahmed, Neaz Morshed, Pulak Talukder y Taslima Rahman. "Research on reuse of standing dye bath of reactive dye". International Journal of Frontline Research and Reviews 1, n.º 2 (30 de noviembre de 2022): 006–10. http://dx.doi.org/10.56355/ijfrr.2022.1.2.0022.

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The aim of the work was to find out suitable method of dyeing so that costly reactive dye bath can be reused without draining them. Because of the hydrolysis of residual reactive dyes due to the fixation conditions and because of relatively large amounts of dyes and salts left in the effluent, reusing hydrolyzed reactive dyes is a challenge to dyers. Two reactive dyes were examined (reactive red, reactive yellow and two fabrics: nylon, silk as well as silk fiber and nylon yarn). When using suitable dyeing conditions by controlling pH and temperature, hydrolyzed reactive dye baths for silk and nylon dyeing showed very good wash and moderate colorfastness.

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Patil, Ashwini A., Saptarshi Maiti y Ravindra V. Adivarekar. "The use of poly(amido)amine dendrimer in modification of cotton for improving dyeing properties of acid dye". International Journal of Clothing Science and Technology 31, n.º 2 (15 de abril de 2019): 220–31. http://dx.doi.org/10.1108/ijcst-04-2018-0055.

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PurposeCotton being an anionic fiber can be dyed with direct, reactive, vat and sulfur dyes but cannot be dyed with acid dyes due to their chemical differences. But there are certain advantages of acid dyes like acid dyeing is the simplest method than the other classes of dyes; and it offers various intense and bright shades. So, the purpose of this paper is to focus on acid dyeing of cotton fabric after its chemical modification.Design/methodology/approachSuch modification of cotton fabric has been achieved using poly(amido)amine dendrimer (PAMAM) treatment. The current work is based on the synthesis of a full-generation PAMAM dendrimer (G0) and its application onto the cotton fabric for modifying the cotton substrate by the exhaust and padding method.FindingsThe treatment of the dendrimer on cotton fabric has been analyzed by Fourier transform infrared spectroscopy and scanning electron microscopy. The dyeing results in terms of color strength of the treated cotton fabrics are compared with those of conventional acid dyed silk fabric. The fastness assessments such as wash, light and rubbing fastnesses after dyeing of treated cotton fabrics are also performed and found to be satisfactory.Originality/valueThis paper can be used in the application of synthesized poly(amido)amine dendrimer in acid dyeing of cotton.

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Patel, Manoj J., R. C. Tandel, Srujal A. Sonera y Sagar K. Bairwa. "Trends in the synthesis and application of some reactive dyes: A review". Brazilian Journal of Science 2, n.º 7 (9 de marzo de 2023): 14–29. http://dx.doi.org/10.14295/bjs.v2i7.350.

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From last 25 years that many researchers have developed the novel reactive dyes with modification in structure of reactive dyes. In the present review paper concentrated development of reactive dyes. The review paper is focused on the highlight such dyes have having excellent dyeing properties and wet-fastness properties. This review paper express the monstrous impression of reactive dyes on the textiles coloration industry. Particularized details are given regarding evolution in the chemistry of reactive structure systems. It is additionally mentioned pointed out that advance research is mandatory to enhance dye fixation and wet-fastness properties. Reactive dyes have been used for the past hundred years for dyeing of cellulosic fabrics. A reactive dye has a chromophore, which is a group or an atom that is responsible for the dye’s colour. It has a component which reacts with the fabric or substrate. They have excellent fastness features due to the presence of covalent bonds that takes place during dyeing. The dyeing industry is dominated by the parties who can create dyes having excellent dyeing efficiency, stable, can be resistant to chemical actions and be affordable. In this review on development of synthesis reactive dyes has been provided. This review paper concentrated on research of reactive groups type.

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Liu, Hao, Minglei Lu, Fukui Pan, Xin Ning y Jinfa Ming. "Influence of fluorescent dyes for dyeing of regenerated cellulose fabric". Textile Research Journal 90, n.º 11-12 (5 de diciembre de 2019): 1385–95. http://dx.doi.org/10.1177/0040517519892915.

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This study attempted to dye regenerated cellulose fiber fabric with fluorescent dyes in different conditions (dyeing time, temperature, pH, concentration, etc.) and investigated their effects on color strength, fluorescence intensity, and other properties of dyed fabrics. The exhaust dyeing method was applied in this experiment for cellulose based knitted fabrics. The physical properties of dyed knitted fabrics before and after treatment with fluorescent dyes were determined and evaluated. After fluorescent staining, the results showed that a large number of granular fluorescent particles were coated on the fiber surface. Higher K/ S values were obtained under conditions of a dyeing temperature of 80℃, dyeing time of 30 min, and NaCl concentration of 1 wt% than other conditions. Moreover, the fluorescence intensity of the dyed fabric was also highest at 80℃. The color strength and bursting strength of dyed knitted fabrics were increased with the increase of the concentration of fluorescein sodium. Thus, cellulose based knitted fabric dyed with fluorescent dyes exhibited excellent fluorescent properties and could be used in fluorescent clothing.

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Mamun, Md Abdullah Al, Mohammad Mamun Hossain y Mubarak Ahmad Khan. "Dyeing of Polyester Fabric with Natural Colorants Extracted from Mahogany (Swieteniamahagoni) Seed Pods". Journal of Engineering Science 11, n.º 1 (5 de octubre de 2020): 37–42. http://dx.doi.org/10.3329/jes.v11i1.49545.

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Polyester fabric is usually dyed with disperse dyes which has severe limitations specially toxicity and environmental issues. The aim of the present research is to introduce an ecofriendly dyeing process for polyester fabric with natural dyes. The natural colorants were extracted from mahogany seed pods using the simple acid boiling method. The spectroscopic analysis of the crude extract was carried out by UV and IR spectra of the extracted dyes and illuminated the presence of natural tannins as coloring materials in the crude extract. 10g fabric was dyed in 200cc extracted solution at 130⁰C for 60 minutes in exhaust dyeing method followed by neutralization and soaping. Finally, a light brown dyed fabric was obtained. The dyed fabric exhibited color strength in terms of k/s value of 0.63 (λmax 360nm), lightness of 80.565 and chromaticity value of 12.002 CIE units. Different samples were dyed by fluctuating the dyeing period. The dyeing traits of the dyed materials were judged in terms of their color strength and fatness properties. All testes were carried out following the ISO standards. From the results, it is lucid that the dyed fabric showed acceptable color fastness properties in case of all fastness except color fastness to light. It is observed that dyeing time had profound influence on the color strength (k/s value) of the dyed material. The k/s value increases with the increase of dyeing period up to 120 minutes. The maximum color strength (0.76) was noted for the fabric. The shorter dyeing time produces lighter samples and the longer dyeing time produced colorful samples. Journal of Engineering Science 11(1), 2020, 37-42

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Abdelmoteleb, Khaled M. A., Morsy A. El-Apasery, Ashraf A. F. Wasfy y Sara M. Ahmed. "Synthesis of New Monoazo Disperse Dyes for Dyeing Polyester Fabric Using Two Different Dyeing Methods: Demonstration of Their Antibacterial and Anticancer Activities". Polymers 15, n.º 14 (15 de julio de 2023): 3052. http://dx.doi.org/10.3390/polym15143052.

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3-(dimethylamino)-1-phenylprop-2-en-1-ones were obtained with good yields by reacting dimethylformamide dimethylacetal with different methyl ketones. 3-oxo-3-phenyl-2-(2-phenylhydrazono)propanals disperse dyes were obtained via reacting of 3-(dimethylamino)-1-phenylprop-2-en-1-ones with phenyldiazonium chloride. The novel dyes were used in dyeing polyester fabrics through two different dyeing methods at temperatures of 100 and 130 °C. We found that the color strength when using the dyeing method at 130 °C was better than the dyeing method at 100 °C. The fastness properties of dyed fabrics with these new disperse dyes were studied and gave very good results (except for fastness to light, which gave moderate results). The new dyes were evaluated against some different types of bacteria and cancer, which showed excellent and promising results for the possibility of using these dyes as antibacterial and anticancer agents.

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28

Zhu, Lei, Jun Li Chen, Qiu Bao Zhou, Jin Huan Zheng y Wei Guo Chen. "Union Dyeing of Wool/Silk Blends at Low Temperature". Advanced Materials Research 332-334 (septiembre de 2011): 1382–85. http://dx.doi.org/10.4028/www.scientific.net/amr.332-334.1382.

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Protein fibers are attractive topics in the past decades. Among them, silk and wool fibers are very popular due to their luster, smooth surface and comfort. In order to reach union dyeing of silk/wool blends, chlorination pretreatment or introduction of low-temperature dyeing auxiliary for wool are selected and compared. The results showed that chlorination pretreated wool/silk dyed with weak acid dyes, can reach union dyeing under 80 oC, possibly under 70 oC. On the other hand, introduction of low-temperature dyeing auxiliary can slightly improve the union dyeing at different temperature ranges according to selection of weak acid dyes.

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Kabir, Shekh Mamun, Mahabub Hasan y Zulhash Uddin. "Novel Approach to Dye Polyethylene Terephthalate (PET) Fabric in Supercritical Carbon Dioxide with Natural Curcuminoid Dyes". Fibres and Textiles in Eastern Europe 27, n.º 3(135) (30 de junio de 2019): 65–70. http://dx.doi.org/10.5604/01.3001.0013.0744.

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The use of natural dyes has increased in the last few decades due to the eco-friendly approach of dyeing. There are still some limitations that are associated with natural dyes, such as dyeing efficiency, reproducibility of shades, process complexity, availability etc. The main problem associated with the dyeing property of natural dyes is “low exhaustion”. In this study, natural dyestuff from Curcuma longa L. was extracted and polyethylene terephthalate fabric was dyed with it in the same bath by employing the supercritical carbon dioxide method. The method was developed to improve the dye-ability of natural dyes and reduce the process time and effluent. Curcuminoid dye exhaustion on PET fabric showed almost 80% by using supercritical carbon dioxide dyeing methods, and the highest colour strength (K/S = 12) was obtained. Coloured polyethylene terephthalate fabric treated with supercritical carbon dioxide showed deeper shades (L* = 72.92) and better fastness properties as compared with high temperature exhaust dyeing methods.

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30

Gao, Shu Zhen y Qun Liu. "The Investigation of Dyeing Properties of Anion Modified Linen Fibers". Advanced Materials Research 535-537 (junio de 2012): 1605–8. http://dx.doi.org/10.4028/www.scientific.net/amr.535-537.1605.

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Linen fibers oxidated by sodium periodate were anion-modified with sodium bisulfite, and treated linen fibers were dyed with cationic dyes. The thermodynamics principle of dyeing on modified linen fibers has been investigated by means of drawing adsorption isotherms,calculating dyeing saturation value and measuring dyeing levelness. The results indicate that adsorption isotherm of dyeing modified linen fibers with cationic dyes belongs to Langmuir adsorption isotherm,and the levelness of modified linen fabrics was better, the results indicate that the function of modification agent on linen fibers were more comprehensive and balanced.

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31

Yan, Xiaoxing, Xingyu Qian, Rong Lu y Tetsuo Miyakoshi. "Comparison and Optimization of Reactive Dyes and Coating Performance on Fraxinus mandshurica Veneer". Polymers 10, n.º 12 (24 de noviembre de 2018): 1302. http://dx.doi.org/10.3390/polym10121302.

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In this study, Fraxinus mandshurica veneer was dyed with reactive brilliant red X-3B, black KN-B and blue K-3R dyes. The dye concentration, bath ratio and dyeing time were selected for an orthogonal experiment. Analysis of variance showed that the dye concentration had the greatest effect on the dye uptake of F. mandshurica veneer. In the independent experiments, dye uptake increased at first and then decreased with increasing dye concentration; the chromatic aberration increased with the dye concentration and then remained steady. The infrared spectra were used to examine the dyeing behaviors before and after dyeing and the binding form between reactive dyes and F. mandshurica veneer was analyzed. Based on the optimization of process parameters, the optimal dyeing condition was considered to be 75 °C, the dye concentration to be 0.5–1.0%, the dyeing time to be 60 min and the bath ratio to be 20:1. The dye uptakes of reactive brilliant red X-3B, black KN-B and blue K-3R dyes were 75.0–75.4%, 50.0–64.6% and 32.0–66.0%, respectively. The chromatic aberration of F. mandshurica veneer dyed with reactive brilliant red X-3B, black KN-B and blue K-3R dyes was 53.0–59.0, which was a significant increase. After dyeing, the hardness and impact strength of the waterborne coating on the dyed F. mandshurica increased but adhesion was reduced. The coating films produced a matte glossiness.

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32

Al-Etaibi, Alya M. y Morsy Ahmed El-Apasery. "Facile Synthesis of Novel Disperse Dyes for Dyeing Polyester Fabrics: Demonstrating Their Potential Biological Activities". Polymers 14, n.º 19 (22 de septiembre de 2022): 3966. http://dx.doi.org/10.3390/polym14193966.

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Original work showed the composition of the dyes and the antimicrobial/UV protective properties of a series of dyes obtained in our laboratories over the past twelve years in an easy way using microwave technology and their comparisons with conventional methods. The results we obtained clearly indicated that by using the microwave strategy, we were able to synthesize the new disperse dyes in minutes and with a much higher productivity when compared to the traditional methods, which took a much longer time, sometimes up to hours. We also introduced ultrasonic technology in dyeing polyester fabrics at 80 °C for an environmentally friendly approach, which was an alternative to traditional dyeing methods at 100 °C; we obtained a much higher color depth than traditional dyeing methods reaching 102.9%. We presented both the biological activity of the prepared new dyes and the fastness properties and clearly indicated that these dyes possess biological activity and high fastness properties.We presented through the results that when dyeing polyester fabrics with some selected disperse dyes, the color strength of polyester fabrics dyed at high temperatures was greater than the color strength of polyester fabrics dyed at low temperatures by 144%, 186%, 265% and 309%. Finally, we presented that a ZnO or TiO2 NPs post-dyeing treatment of polyester fabrics is promising strategy for producing polyester fabrics possess multifunction like self-cleaning property, high light fastness, antimicrobial and anti-ultraviolet properties.

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33

Teng, Xiao Xu, Jian Wei Shi y Shu Fen Zhang. "Impact of Reactive Dye Structures on Dyeing Properties in Salt-Free Reactive Dyeing". Advanced Materials Research 781-784 (septiembre de 2013): 2716–21. http://dx.doi.org/10.4028/www.scientific.net/amr.781-784.2716.

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The cationic cotton was obtained by pretreatment with tertiary amine cationic polyacrylamide, and dyed with various active groups reactive dyes in the absence of salt. The influences of reactive dye structures on dyeing properties were analyzed and the results showed that types of active groups in reactive dyes had little effect on dye exhaustion, but it was quite relative with dye reactivity and fixation. Reactive dyes with low molecular weight and more anionic groups were adsorbed more quickly on the cationic cotton and their adsorption time to reach adsorption equilibrium was shorter, compared with that with large molecular weight and less anionic groups. Moreover, exhaustion of reactive dyes with large molecular structures decreased due to sterically hindered effect in the salt-free dyeing. The results also displayed that the monochlorotriazine reactive dyes and the vinyl-sulfone ones were favorable to dye the cationic cotton without salt addition.

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VERMA, MONA, SAROJ S. JEET SINGH y NEELAM M. ROSE. "OPTIMIZATION OF REACTIVE DYEING PROCESS FOR CHITOSAN TREATED COTTON FABRIC". Cellulose Chemistry and Technology 56, n.º 1-2 (1 de marzo de 2022): 165–75. http://dx.doi.org/10.35812/cellulosechemtechnol.2022.56.16.

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The colour of textiles plays an important role in the marketability of fabrics, due to its psychological and eye-catching effects on consumers. Synthetic dyes are widely used in the textiles industry due to their ability to reproduce different colours and shades, easy application method and huge production to fulfill the demands of ever-increasing population. Reactive dyes are most commonly used for cotton fabric, due to their brilliant colours and good washing fastness. However, the major problem with reactive dyes is that they consume huge amounts of alkali or salts as mordant for the fixation of dyes on cotton fabric. Most of the commercial dyeing units and textile export houses have started seeking possibilities to use safe synthetic dyes for dyeing different textiles for targeting the niche market. For that purpose, appropriate standardized scientific dyeing techniques and procedures need to be adopted. In the present study, the use of chitosan as mordant, instead of alkali or salt, was investigated for dyeing cotton fabric with reactive red dye, and the dyeing variables were optimized to attain the maximum colour strength value. The results of study showed that higher percent dye absorption (78.90%), colour strength (18.72) and good wash fastness rating (4/5) were achieved for the chitosan treated dyed fabric, compared to the alkali treated dyed sample (68.36% and 13.03, respectively).

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Fu, Zhong Jun, Hao Fei Huang, Lu Shan Yu y Hong Wang. "Research on Dyeing and Finishing Technology of Polylactic Acid Fiber". Applied Mechanics and Materials 364 (agosto de 2013): 660–63. http://dx.doi.org/10.4028/www.scientific.net/amm.364.660.

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In this paper, polylactic acid fabric (PLA) was dyed with five different disperse dyes and the effect of dyeing parameters including time and temperature on the dyeing adsorption%, K/S value and the strength properties were studied. The recommended disperse dyeing conditions and dyeing profiles were also summarized.

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36

Ji, Xinyu, Zhijun Zhao, Yulu Ren, Fei Xu y Jianhong Liu. "Dyeing Properties, Color Gamut, and Color Evaluation of Cotton Fabrics Dyed with Phellodendron amurense Rupr. (Amur Cork Tree Bark)". Molecules 28, n.º 5 (27 de febrero de 2023): 2220. http://dx.doi.org/10.3390/molecules28052220.

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The application of plant dyes in the textile industry has been very limited due to their limited sources, incomplete color space, and narrow color gamut, etc. Therefore, studies of the color properties and color gamut of natural dyes and the corresponding dyeing processes are essential for completing the color space of natural dyes and their application. In this study, water extract from the bark of Phellodendron amurense (P. amurense) was used as a dye. Dyeing properties, color gamut, and color evaluation of dyed cotton fabrics were studied, and optimal dyeing conditions were obtained. The results showed that the optimal dyeing process was pre-mordanting with liquor ratio at 1:50, P. amurense dye concentration at 5.2 g/L, mordant concentration (aluminum potassium sulfate) at 5 g/L, dyeing temperature at 70 °C, dyeing time of 30 min, mordanting time of 15 min, and pH 5. Through the optimization of the dyeing process, a maximum color gamut range was obtained with lightness L* value from 74.33 to 91.23, a* value from −0.89 to 2.96, b* value from 4.62 to 34.08, chroma C* value from 5.49 to 34.09, and hue angle h° value from 57.35° to 91.57°. Colors from light yellow to dark yellow were obtained, among which 12 colors were identified according to the Pantone Matching Systems. The color fastness against soap-washing, rubbing, and sunlight on the dyed cotton fabrics all reached grade 3 level or above, further expanding the applicability of natural dyes.

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Abdelmoteleb, Khaled M. A., Ashraf A. F. Wasfy y Morsy Ahmed El-Apasery. "Novel Disperse Dyes Based on Enaminones: Synthesis, Dyeing Performance on Polyester Fabrics, and Potential Biological Activities". Molecules 29, n.º 10 (9 de mayo de 2024): 2227. http://dx.doi.org/10.3390/molecules29102227.

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1-(3-aryl)-3-(dimethylamino)prop-2-en-1-one (enaminones) derivatives and the diazonium salt of para-chloroaniline were used to synthesize several novel disperse azo dyes with high yield and the use of an environmentally friendly approach. At 100 and 130 °C, we dyed polyester fabrics using the new synthesized disperse dyes. At various temperatures, the dyed fabrics’ color intensity was assessed. The results we obtained showed that dyeing utilizing a high temperature method at 130 °C was enhanced than dyeing utilizing a low temperature method at 100 °C. Reusing dye baths once or twice was a way to achieve two goals at the same time. The first was obtaining a dyed product at no cost, and the second was a way to treat the wastewater of dyeing bath effluents and reuse it again. Good results were obtained for the fastness characteristics of polyester dyed with disperse dyes. When the disperse dyes were tested against certain types of microbes and cancer cells, they demonstrated good and encouraging findings for the potential to be used as antioxidants and antimicrobial agents.

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Nabieva, I. A., Z. Sh Islamova y V. D. Khamidova. "Improvement of the process of dying of wool with natural dyes". Journal of Almaty Technological University, n.º 4 (22 de diciembre de 2023): 43–52. http://dx.doi.org/10.48184/2304-568x-2023-4-43-51.

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This article describes the process of dyeing bleached wool fibers with natural dyes using aluminum, iron and copper salts as a mordant (the coloristic features of the cinnabar dyeing process are studied). The staining process was carried out in three different sequences: pre-treatment with mordants, then staining in a natural dye solution (I); one-bath dyeing in a solution of dye and mordant (II); dyeing in a solution of natural dye, followed by treatment with mordants (III). The influence of the staining sequence on the quality of staining was evaluated by data determined under standard illumination D65 on a laboratory colorimeter. The article shows the dependence of the processes of dyeing wool with natural dyes Madder (Rubia tinctorum L.), Turmeric (Cúrcuma lónga) and Carmine (Minium - cinnabar) on the presence and place of pickling salts in the technological wiring. Madder dye itself gives a golden color, and in the presence of copper sulfate and iron gives a pale brown color, and potassium dichromate gives a bright saturated red color. When dyeing wool with Carmine dye in the presence of iron and copper salts as mordants, carmine wool gives 1.5-2.5 times more intense dark red colors, depending on the dyeing method, than when dyed without salts. The dependence of the color intensity on the pH of the medium has been studied, taking into account the fact that the pH of the dyeing process affects the strength and color parameters of the colors obtained on wool fiber with natural dyes. An IR spectral analysis of samples dyed with the studied dyes was carried out in comparison with undyed wool fiber to identify the nature of the occurrence of bonds between wool fiber and natural dyes.

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Xiao, Hang, Chunhong Li, Peng Wang y Tao Zhao. "A feasible approach for enhancing union dyeing of wool/acrylic blend fabrics with heterobifunctional cationic reactive dyes". Textile Research Journal 89, n.º 23-24 (13 de mayo de 2019): 5085–95. http://dx.doi.org/10.1177/0040517519849452.

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In this work, a facile method to enhance union dyeing with cationic reactive dyes on wool/acrylic blend fabrics was reported. Three cationic reactive dyes containing various numbers of reactive groups were synthesized and employed on wool, acrylic and wool/acrylic blend fabrics using the one-bath one-step method. Factors affecting the dye exhaustion, union dyeing and leveling properties, including dyeing pH, temperature and dye structure, were investigated. Experimental results revealed that the cationic reactive dye containing heterobifunctional reactive groups and a cationic group attached on the backbone of structure exhibited better union dyeing properties, irrespective of dyeing method. The improvement in the union dyeing on wool and acrylic fabrics followed a decreasing order: Dye 1 > Dye 3 > Dye 2. In additional, the wool/acrylic blend fabrics dyed with Dye 1 showed outstanding leveling properties. The fastness properties of wool/acrylic fabrics for all cationic reactive dyes were good to excellent.

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40

Hao, Xu y Yan Hua Lu. "Dyeing Properties of Tussah Silk Fabric with Indigo Naturalis and Turmeric". Advanced Materials Research 331 (septiembre de 2011): 352–55. http://dx.doi.org/10.4028/www.scientific.net/amr.331.352.

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Two vegetable dyes of indigo naturalis and turmeric were combined on dyeing tussah silk fabric with two steps. The first step is dyeing the silk fabric with indigo naturalis by reduction process, and then dyed with turmeric by direct dyeing process. The results of single factor experiment on the indigo naturalis dyed tussah silk fabric dyeing with turmeric indicated that the relative concentration, pH value, dyeing temperature, and dyeing time had effect to a certain extent on the over dyeing. The dyeing conditions were determined by the above single factor experiment. The rubbing fastness and washing resistance of the dyed silk fabric could achieve to grade 3 more than grade 3.

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41

Maradiya, Harir. "Monoazo disperse dyes based on 2-amino-1,3,4-thiadiazole derivatives". Journal of the Serbian Chemical Society 67, n.º 11 (2002): 709–18. http://dx.doi.org/10.2298/jsc0211709m.

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A series of monoazo disperse dyes based on 2-amino-5-mercapto-1,3,4-thiadiazole was prepared by coupling with various N-arylmaleimides. The dyeing performance of these dyes was assessed on nylon fabric. The dyes were found to give yellow to brown colour shades on dyeing with good depth and levelness on nylon fabric. The dyebath exhaustion fixation and fastness properties of the dyes were also determined. The dyed fabric showed moderate to good light fastness and very good to excellent fastness to washing, rubbing, perspiration and sublimation. The IR and visible range spectral properties of the dyes were also determined.

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42

Cheng, Yu-Wen, Jean-Sebastien Benas, Fang-Cheng Liang, Shang-Ming Lin, Ting-Wang Sun, Fu-Chieh Liu, Yang-Yen Yu y Chi-Ching Kuo. "Synthesis of Azo Disperse Dyes with High Absorption for Efficient Polyethylene Terephthalate Dyeing Performances in Supercritical Carbon Dioxide". Polymers 14, n.º 15 (26 de julio de 2022): 3020. http://dx.doi.org/10.3390/polym14153020.

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Supercritical carbon dioxide dyeing (SCDD) not only enables strong dyeing performance for a versatile range of polymer material but is also regarded as a green chemical media due to its low environmental impact as well as low risk of product denaturation. Over the decades, azo disperse dyes have been revealed to be efficient dyes and represent the wide majority of dyeing material. Azo dyes possess a wide variety of functional groups to optimize dye synthesis and tune the light absorption properties. Using SCDD, end-chain of different lengths, and functional group exhibiting various electronic affinity, six disperse red azo dyes were synthesized to investigate dyeing performances as woven fabric type, color strain, and color fastness after dyeing are discussed. Dye structure synthesized through a coupling reaction was confirmed by 1H NMR and mass spectroscopy. We found that the light absorption wavelength and absorption coefficient value variation are associated to the nature of the functional group. From the color strength values of the polyethylene terephthalate woven after dyeing, we find that the fiber host and dye dopant chemical structure greatly influence the dyeing process by providing enhanced woven, color strain, and color fastness. In comparison with commercial products, our approach not only improves the dyeing process but also guarantees a strong resistance of the dyed product against water, detergent, perspiration, abrasion, and friction.

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MIURA, Y., I. HIRAI, K. ISHII, S. MATSUYAMA, A. TERAKAWA, Y. KIKUCHI, M. FUJIWARA et al. "PIXE ANALYSIS OF DYES USED IN TRADITIONAL JAPANESE CARPETS (NABESHIMA-DANTSU)". International Journal of PIXE 22, n.º 01n02 (enero de 2012): 45–50. http://dx.doi.org/10.1142/s0129083512400281.

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NABESHIMA-DANTSU is the name of the first Japanese-made carpets which have been produced in the Nabeshima domain (Saga Prefecture) since the later Edo period. The NABESHIMA-DANTSU carpets have been woven from one kind of cotton, and have been dyed with various dyes and color fixatives. We analyzed pieces of the NABESHIMA-DANTSU carpets stored in the Saga Prefectural Museum and the Saga Prefectural Art Museum, by using PIXE method in order to detect dyeing methods used in them. We also analyzed dyes, color fixatives and cotton used in the traditional Japanese dyeing method. From the NABESHIMA-DANTSU carpets, small amounts of dyed and non-dyed samples were picked up and were analyzed by in-air PIXE system at Tohoku University. It was found that Fe and Cu are related to the parts dyed orange, and Al is related to the parts dyed green. The analysis of cotton dyed by the traditional Japanese method shows the similar results. It means that both colors in the NABESHIMA-DANTSU carpets were dyed by the traditional Japanese method which uses natural dyes. From literature documentation, it is considered that synthetic dyes were mainly used during the Taisho era. The present result shows that natural dyes might have been used in the Taisho era. In this research the PIXE method has proved to be very effective for the analysis of dyeing methods.

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Teng, Xiao Xu, Jian Wei Shi y Shu Fen Zhang. "Research in the Cold Pad-Batch Dyeing Process for the Cationic Cotton". Advanced Materials Research 864-867 (diciembre de 2013): 2145–51. http://dx.doi.org/10.4028/www.scientific.net/amr.864-867.2145.

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Cotton fabrics pretreated with cationic polyacrylamide with quaternary ammonium group were dyed with three reactive dyes in the absence of salt by cold pad-batch dyeing method. The influences of various conditions in the dyeing process, including urea dosage, selection of alkali agent and its dosage, batching time and batching temperature on colour yield, were analyzed. Fastness properties of the dyed cotton and the dye penetration were investigated between the pretreated and untreated cotton. The results showed that the dyesK/Svalues of the pretreated cotton were improved compared with those of the untreated one, in addition, the penetration and fastness properties of the dyed cationic cotton were satisfied for application.

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45

Pawar, Ashitosh B., Kaustubh C. Patankar, Pallavi Madiwale y Ravindra Adivarekar. "Application of chemically modified waste Allium cepa skin for one bath dyeing of polyester/wool blend fabric". Pigment & Resin Technology 48, n.º 6 (4 de noviembre de 2019): 493–501. http://dx.doi.org/10.1108/prt-11-2018-0118.

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Purpose The purpose of this paper is to highlight the one bath dyeing method for polyester/wool (PES/Wo) blend fabric with two different semi-synthetic azo dyes developed by chemically modifying the outer skin of Allium cepa. Design/Methodology/Approach Chemical modification is the most heartening way to impart improved properties to natural sources. Two different primary amines were coupled with the Allium cepa skin extract by a diazo coupling reaction. Synthesised dyes were characterized for their percentage yield, solubility tests, melting point, particle size analysis as well as FTIR spectroscopy and UV-Visible analysis. One bath dyeing methodology was used for application of synthesized dyes on PES/Wo blend fabric. Dyeing was performed at boil without any additional auxiliary and further percentage dye exhaustion was evaluated. Findings Dyeing yielded solid shade on PES/Wo blend fabric with satisfactory levelness in dyeing. The efficacy of synthesized dyes for dyeing of PES/Wo fabric was studied by wash, rub, light and sublimation fastness properties, which are in good agreement with commercial requirements. The antimicrobial activity of the synthesized dyes shows excellent activity in dye powder form (AATCC 147 test method) as well as on dyed fabrics (AATCC 100 test method). Originality/Value Present research work is a first successful attempt to dye PES/Wo blend fabric with semi-synthetic azo dyes in single bath at boil. Such approach facilitates minimum consumption of energy, cost and time.

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46

J. Jalil, A., S. Mahmood, A. H. Abdul Rashid, S. H. Nasir, S. A. Ibrahim y M. R. Ahmad. "Extraction of Eco-Friendly Natural Dyes from Pina Leaves and their Application on Wool Fabrics". International Journal of Engineering & Technology 7, n.º 4.14 (24 de diciembre de 2019): 382. http://dx.doi.org/10.14419/ijet.v7i4.14.27689.

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Natural dyes comprise of colorants that are obtained from animals or vegetable matters without any chemical processing. Natural dyes can substitute synthetic dye and promotes green technology initiatives in the field of textile dyeing. This study was carried out by extracting dyes from pineapple leaves (Ananas Comosus) using three stage mordanting methods using different mordants namely pre-mordanting, post-mordanting and simultaneous dyeing-mordanting. The mordants used were aluminium potassium sulphate, white vinegar and sodium chloride (NaCl). Wool fabrics were used for dyeing. The strength of colour and K/S values of the dyed fabrics were measured before and after washing. The colourfastness to washing, rubbing and light fastness of the fabrics were conducted to investigate the performance of the dye and mordants. The results indicate that the washing, rubbing and light fastness properties of dyed samples were between good to excellent grades.

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47

Patel, Hitendra. "Synthesis, characterization and dyeing behavior of heterocyclic acid dyes and mordent acid dyes on wool and silk fabrics". Journal of the Serbian Chemical Society 77, n.º 11 (2012): 1551–60. http://dx.doi.org/10.2298/jsc120110047p.

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Novel heterocyclic acid and mordent acid dyes were synthesized by the coupling of diazonium salt solution of different aromatic amines with 2- butyl-3-(4-hydroxybenzoyl)benzofuran. The resulting heterocyclic acid dyes were characterized by spectral techniques, i.e., elemental analysis, IR, 1HNMR, 13C-NMR spectral studies and UV- visible spectroscopy. The dyeing performance of all the heterocyclic acid dyes was evaluated on wool and silk fabrics. The dyeing of chrome pre treated wool and silk fabrics showed better hues on mordented fabrics. Dyeing of wool and silk fabrics resulted in pinkish blue to red shades with very good depth and levelness. The dyed fabrics showed excellent to very good light, washing, perspiration, sublimation and rubbing fastness.

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48

Ding, Ying, Zaisheng Cai, Liming Wang, Yong Shen y Qunyan Gao. "The Adsorption Character of Kapok Fiber and Reactive Dyeing Technology on Modified Kapok Fiber". Journal of Engineered Fibers and Fabrics 9, n.º 3 (septiembre de 2014): 155892501400900. http://dx.doi.org/10.1177/155892501400900307.

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The adsorption character of kapok fiber with direct dyes and the dyeing technology of cationic modified kapok fiber with reactive dyes were studied in this article. The results indicate that the optimal dyeing technique parameters for the cationic modified kapok fiber with the reactive dye Cibacron FN-R include 0.5~1% (o.w.f) of dyes, 15~20g·L-1 of NaCl, and 2g·L-1 of JFC with bath ratio of 1:50 at a dyeing temperature of 40°C for 30min. The dyed kapok fiber was fixed with 15~20g·L-1 of Na2CO3 for 60min. As a result, the dye-uptake, fixation ratio, wash fastness, friction fastness, and K/S of cationic modified kapok fabric were enhanced by above technique.

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Yu, Ze Hua, Jing Fang Tang, Xiao Qiao Wan, Xiu Chen, Wei Liu y Ying Zhao. "Effects of Disperse Dyes on Dyeing of Ethylated Chinese Fir Powder". Advanced Materials Research 788 (septiembre de 2013): 241–45. http://dx.doi.org/10.4028/www.scientific.net/amr.788.241.

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The dyeing properties of ethylated Chinese fir powder with disperse dyes under high temperature and high pressure were investigated in this paper, the dyeing results indicated that the color shade of dyed ethylated fir is similar to that of dyed polyester fabric while PH value of dyeing solution is between 4~5, and the dyed sample is of a good wash fastness. At the same time, the characteristics of the samples were analyzed by FT-IR and SEM, it indicated that dyes molecules were adsorbed on the surface and went into the microporous of ethylated fir powder, so that brighter color were observed due to the fact that the ethylated fir powder leads to a smooth surface which being favorable for the reflection of light.

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50

Li, Bing, Yongchun Dong, Zhizhong Ding, Yiming Xu y Chi Zou. "Renovation and Reuse of Reactive Dyeing Effluent by a Novel Heterogeneous Fenton System Based on Metal Modified PTFE Fibrous Catalyst/H2O2". International Journal of Photoenergy 2013 (2013): 1–10. http://dx.doi.org/10.1155/2013/169493.

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Cu-Fe bimetallic grafted polytetrafluoroethylene (PTFE) fiber complexes were prepared and optimized as the novel heterogeneous Fenton catalysts for the degradation of reactive dyes under UV irradiation. Cotton fabrics were dyed with three reactive dyes, namely, Reactive Red 195, Reactive Yellow 145, and Reactive Blue 222, in tap fresh water using exhaustion process. The spent dyeing effluents were then collected and degraded with the optimized Cu-Fe bimetallic grafted PTFE fiber complex/H2O2system. The treated dyeing effluents were characterized and reused for the dyeing of cotton fabrics through the same process. The effect of reuse process number on quality of the dyed cotton fabrics was examined. The results indicated that the Cu-Fe bimetallic modified PTFE fiber complex with a Cu/Fe molar ratio of 2.87 was found to be the most effective fibrous catalyst, which enhanced complete decolorization of the treated dyeing effluents with H2O2in 4 h. However, the TOC removal for the treated dyeing effluents was below 80%. The dyeing quality was not affected for three successive cycles. The increase in residual TOC value influences fourth dyeing cycle. Further TOC reduction of the treated effluents is needed for its repeated reuse in more than three dyeing cycles.

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