Pigment & Resin Technology
·
2019
·Vol. 49
·期 2
·154-162
·
IF 0.724
Kangkang Wang,MengQian Wang,Weiwei Lv,Jiming Yao,Wei Zhang,Xiaoyan Li
Purpose An indirect electrochemical reduction and dyeing with indigo were carried out here to solve problems of low dye reduction rate and poor dyeing depth in the current electrochemical dyeing process. Design/methodology/approach Response surface analysis tests were performed to evaluate the effects of ferrous sulfate concentration, medium concentration, sodium hydroxide concentration and reduction time on the reduction efficiency of indirect electrochemical reduction of indigo. Findings The conditions obtained by design-expert optimization showed that the concentration of FeSO 4 ·7H 2 O has the most significant effect on the reduction performance of dye liquor. Under the optimized electrochemical reduction dyeing process, the rate of dye reduction could be reached 91.21 per cent and the K/S value of indirect electrochemical dyeing of indigo can be achieved to 12.96, which is increased by about 9.56 per cent compared with that of Na 2 S 2 O 4 dyeing with the same color fastness basically. Research limitations/implications The recyclability and biodegradability of the dye remain to be explored. Practical implications The strategy presented here can be developed to replace a substantial part of electrochemical dyeing with optimized product quality and reduced environmental pollution in denim production. Social implications The strategy presented here can be developed to replace a substantial part of electrochemical dyeing with optimized product quality and reduced environmental pollution in denim production. Originality/value Application of the Fe(II)-DGS-Abal B complex media system in the indirect electrochemical reduction of indigo.
研究领域:
电化学
·
纺织染整
·
环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
POLYMER
·
2025
·
IF 4.5
Jinqi Ye,Nasha Zeng,Lili Wang,Keying Zheng,Junyi Lu,Minghua Wu
Disperse dyes wash-free inkjet-dyeing is one of the important research and development directions to achieve clean dyeing of polyester fabrics. Wash-free binders are needed to be designed with a special molecular structure to achieve good colour yield and fixation during dyeing. Specifically, isophorone diisocyanate and polypropylene glycol were used as the monomers of the hard and soft chain segments of the polymer, respectively, and KH-560 as the capping agent, to prepare a series of end-group cross-linked organosilicon modified waterborne polyurethane (SWPU). It was applied as wash-free binder for the digital inkjet-dyed polyester fabrics. The results showed that, for 2 wt% KH-560 and 40 wt% hard chain segments, the SWPU film had good water resistance, mechanical properties, and adhesion properties, and the best dispersed dye directional effect. With the addition of SWPU in the dye ink of 8 wt%, the front K/S value of the SWPU wash-free digital inkjet-dyes fabric reached 16.86, and the dry/wet rubbing fastness achieved grades 4–5 and 3–4, respectively. Compared with the pure dye inkjet-dyed fabric, its front K/S value increased by 23.9 %, and its dry/wet rubbing fastness improved by grades 1 and 0.5, respectively.
研究领域:
高分子科学
·
纺织化学
·
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2023
·
IF 6.6
Yufa Sun,Zilin Zhong,Kaijun Feng,Qi Meng,Bofeng Pan,Xiangdong Zhou
Disperse dyes are hardly soluble in water and are usually milled with large numbers of dispersants in the dye industry. A branched waterborne polyurethane (WPU) as a dispersant with different side chain lengths (WPU350, WPU550 and WPU750) was synthesized through an acetone process. The effects of the side chain length on the stability and dispersibility of disperse dyes were particularly discussed and analyzed. The results showed that due to their special comb-like structures, these WPUs were able to achieve good dispersive ability for disperse dyes and WPU550 had the best dispersibility through steric hindrance and electrostatic repulsion on the surface of dyes. In addition, WPU was further employed to prepare the dispersion to dye the polyester fabric. These dispersions with WPU not only demonstrated an improved K/S value, wet and dry rubbing fastness and soaping fastness but also had better dispersing and dyeing performance than commercial dispersants.
研究领域:
材料科学
·
化学工程
·
纺织科学
✓ 已验证
产品关联
DOI
高影响因子
GREEN CHEMISTRY
·
2016
·Vol. 18
·期 14
·3972-3980
·
IF 8.506
Shaoyu Chen,Wan Zhang,Chaoxia Wang,Shiguo Sun
Development of a non-polluting process for cotton coloring is essential for the textile industry in view of ecological and economical reasons. In order to recycle the residual foam in the foam technique, a photo-responsive azobenzene cationic surfactant (4-butoxy-4′-(trimethylaminoethoxy)azobenzene, BTAEAzo) was synthesized for obtaining switchable foam based on its sensitive and reversible photo-isomerization capability. Trans → cis isomerization of BTAEAzo occurred only within 1 s UV light irradiation and cis → trans conversion could be achieved after 8 min visible light irradiation. Besides, BTAEAzo showed good thermal stability which was stable up to 225 °C. BTAEAzo was able to reversibly switch foam between the stable (t1/2 of 19.09 min) and unstable (t1/2 of 2.93 min) states by light stimulation. Furthermore, dye-bonded blocked waterborne polyurethane, a polymeric dye, was applied in the switchable system and showed no influence on the foam switching capability of BTAEAzo. The coated cotton presented superior color properties including the K/S value, color evenness and fastness with the switchable foam. Most importantly, the residual color foam can be re-used during the coating process with excellent color repeatability. These results demonstrated that the recycled foam coloring process containing only two types of chemicals is a rapid and nearly zero-pollution process, fostering a clean and green textile industry.
研究领域:
纺织科学
·
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
CELLULOSE
·
2022
·Vol. 30
·期 1
·611-624
·
IF 6.123
Ke Guizhen,Mulla Mujammil Salim,Peng Feifan,Chen Shuhui
With the enhancement of awareness of environmental protection, the green natural dyes gradually come into people’s view again. This subject studied the dyeing performance of natural dye Gardenia on tannic acid modified lyocell fabric. The effect of tannic acid concentration, pH of dyeing solution, dyeing time and dyeing temperature on k/s value and colorimetric data (L*, a*, b*, c*) of the dyed lyocell fabric was investigated. The results showed the color strength and yellowness value increased with the increase in dyeing time (within 60 min), dyeing temperature and tannic acid concentration and the decrease in pH value of dye bath. The dyeing process was optimized by response surface analysis. The experimental results showed that the linear effects of dyeing pH, dyeing temperature and tannic acid concentration on the K/S values of the dyed lyocell fabrics were extremely significant. The results of X-ray diffraction, electron microscopy scanning, fourier transform infrared spectroscopy and water contact angle measurements showed that the morphological structure of the tannic acid-treated dyed lyocell fabrics did not change. The results of practical validation and optimization showed that the optimal process of tannic acid pre-mordanting natural dyes Gardenia dyed lyocell fabric was: dyeing time 60 min, dyeing pH = 3.5, dyeing temperature 90 °C, and the measured K/S value of the dyed specimen under this condition was 7.45. Its color fastness to washing and rubbing was above 3. The successful combination of bio-mordant tannic acid and natural dye Gardenia yellow on lyocell fabric provided a green dyeing method for lyocell fiber.
研究领域:
纺织科学
·
环境科学
·
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）