Papers by Keyword: Dyeing

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Authors: Ye Hong Wang, Jian Liu
Abstract: According to the documents and nongovernmental recording, there had been various color names of textiles in Qing dynasty. For example, there were at least 40 colors recorded in the official documents. Process of dyeing got to be good and stable in Qianlong 19th , there were at least 30 different dyeing processes at that time, such as direct dyeing, mordant dyeing, deoxidize dyeing and so on, or something more complicate. The dye stuff included indigo, rhubarb, young fustic, safflower, brazilwood, buds of pagoda tree, Amur cork, cape jasmine, gall, hulls of acorn. Dyeing additives included alum, alkali, prunus mume and almond oil. Rules for blue, red, green dyeing were stricter, while that for yellow and other colors were more flexible.
Authors: Shuang Ying Wei, Di Wang, Ji You Gu
Abstract: The study herein investigated the bond strength of original veneer, dyeing veneer and fixative veneer in terms of moisture content. The test results were shown that: bond strength of untreated veneer, dyeing veneer and fixation veneer were all decreased with moisture content increasing. Furthermore, wet strength of these three kind of veneers were lower than the dry strength themselves evidently. The study also found that dry strength and wet strength of original veneer were all bigger than those of dyeing veneer and fixative veneer evidently.
Authors: Ling Zhong, Gang Xian Zhang, Feng Xiu Zhang, Xu Ting Xue
Abstract: The dyeing accelerating effect of octyl trimethyl ammonium bromide (OTAB) on dyeing silk with reactive red dye B-3BF, reactive yellow dye B-4RFN and reactive dark blue dye B-2GLN was studied in this paper. The dye-uptake rates increased with increasing concentration of OTAB, and the highest dye-uptake rates of three reactive dyes were 91~98%. The adsorption kinetics of dyeing process at different temperatures was also investigated by using pseudo first- and second-order kinetic models. The results showed that adsorption rates increased with increasing temperature. The adsorption kinetics of three reactive dyes on silk with OTAB as accelerant was found to follow the pseudo second-order sorption kinetics equation. The activation energy of reactive red dye B-3BF, reactive yellow dye B-4RFN and reactive dark blue dye B-2GLN dyeing on silk with OTAB as accelerant were found to be 26.91, 17.31, 6.99 kJ/mol, respectively.
Authors: Cheng Chen, Guang Xian Zhang, Feng Xiu Zhang, Hui Zheng
Abstract: With octyl butyl dimethyl ammonium bromide (OBDAB) as accelerant, adsorption kinetics of dyeing silk with three reactive dyes was studied in this paper. As concentration of OBDAB increased, the dye-uptake rate increased. The highest dye-uptake rates of three reactive dyes could reach to 89.40%~98.98% and the concentration of OBDAB was only 6-8g/L. This showed OBDAB was an effective accelerant. Pseudo first- and second-order kinetic models were used to analyze the adsorption kinetic data. The experimental data were found to follow the second-order kinetic model. Meanwhile, the initial dye adsorption rates of reactive red dye B-3BF, reactive yellow dye B-4RFN and reactive orange dye B-2RLN increased as temperature increased, and the activation energy of them were found respectively to be 28.42,13.14,32.90 kJ/mol.The positive values of and obtained indicated that reactive dyes adsorption with OBDAB as accelerant was an endothermic process. The conclusion showed OBDAB was a potential accelerant.
Authors: Rattanaphol Mongkholrattanasit, Kittisak Ariyakuare, Tuernchai Limtrakool, Chintana Saiwan, Nattadon Rungruangkitkrai, Nattaya Punrattanasin, Kamolkan Sriharuksa, Monthon Nakpathom
Abstract: A natural dye extracted from lac was applied to a silk fabric by the use of pad-dry technique under different conditions. The dyeing properties were evaluated by measuring K/S and CIELAB values. In addition, the different fastness properties were evaluated. The effect of dyes at different mordant concentration levels with respect to their colour strength was also studied. Silk fabrics dyed with lac extract showed a light pink shade, while those dyed with alum and stannous chloride pinkish-red colour. Silk substrates dyed with CuSO4 gave a purple red colour, while those dyed with FeSO4 had a reddish-gray colour. The fastness properties ranged from fair to good, while washing fastness was poor level.
Authors: Rattanaphol Mongkholrattanasit, Charoon Klaichoi, Nattadon Rungruangkitkrai, Nuttanan Sasivatchutikool
Abstract: Natural dye extracted from the mangrove bark was applied to a silk fabric by an exhaustion dyeing process. The dyeing was conducted with and without metallic salt mordants using pre-mordanting. It was observed that with an increase in the dye concentration, the ultraviolet (UV) protection factor (UPF) values ranged between good and excellent for the silk fabric. In addition, a darker color, such as that provided by a CuSO4 mordant, gave better protection because of higher UV absorption. The results confirmed that natural dyes from mangrove bark extract with metal mordants have potential applications in fabric dyeing and in producing UV-protective silk fabrics.
Authors: Long Fang Ren, Guo Hui Zhao, Tao Tao Qiang, Jing Xian Wang, Xue Chuan Wang
Abstract: Hyperbranched polymer with different contents of terminal amino group synthesized with succinic anhydride and DETA through the molten polymerization method was used in the dying process of microfiber synthetic leather substrate as color fixing agent. The effect on dye-uptake, surface chromas of microfiber synthetic leather substrate, wet and dry rub fastness was discussed. The result indicated that when the dosage of hyperbranched polymer with 5.85% terminal amino groups was 0.8%, the dye uptake rate was 92.92% and surface chroma was the best, the wet and dry rub fastness of microfiber synthetic leather substrate were almost unchanged.
Authors: De Hong Cheng
Abstract: In this paper ionic liquid 1-butyl-3-methylimidazolium chloride (BmimCl) as accelerating agent was applied in silk dyeing and the dyeing performances of silk with ionic liquid were determined under different dyeing conditions. The obtained results indicated that the rate of dye uptake was about 85.4%, the K/S value was 11.2, breaking strength was 426 when 2 g silk was immersed in 60 ml dye solution, the concentration of ionic liquid was 2.0%, dyeing temperature was 50 °C and bath ratio was 1:30. Investigation on dyeing mechanism of silk with ionic liquid indicated that ionic liquid BmimCl interacted with amino acid in surface of silk and dyes through the electrostatic interaction between cation Bmim+ and the CO2- group of amino acid and SO3- group of dye in dyeing process.
Authors: Juan Zhang, Yu Ping Zhao, Ya Lin Guo, Bin Wu
Abstract: In this work, the dyeing methods with ultrasonic technology and tradition method were investigated. Dye uptake and rubbing fastness as detection index of feather fibers were analysed. The optimum conditions of dyeing in feather fibers with ultrasonic wave technology were determined: weak acid dye: dyeing temperature 70°C, time 40min; reactive dye: dyeing temperature 90°C, time 50min. The results showed that in this dyeing conditions, dye uptake using ultrasonic technology can reach 89.9%, that increased 31.9% comparing with that using traditional method; rubbing fastness can be over 3 grade, and the dry rubbing fastness was raised by 0.5~1 grade as compared with the wet rubbing fastness. It was found that the effect of dyed feather fibers can be better by using ultrasonic technology, which were eco friendly and so give good effect to human in addition to values on garments, and provided the beneficial to test for development of feather fibers.
Authors: Sha Sha Sun, Na Chen, Fang Yao, Ren Cheng Tang
Abstract: Silk is blended with wool to make high-class apparel, contributing luster and strength. For the dyeing of silk/wool blends, the solid shades are usually required. However, the apparent color strength of dyed wool is generally higher than that of silk, which must be improved through the selection of dyes employed as well as the control of pH and dyeing temperature. In this paper, a novel approach of syntan application to improving the solid effect of silk/wool blends dyed with acid dyes was investigated. The influence of syntan on the distribution of different acid dyes in silk and wool as well as the apparent color strength of two fibers was determined. The mechanism for syntan to improve the solid effect was discussed according to the behaviors of syntan adsorption on silk and wool as well as fiber structures.
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