Journal of Cleaner Production
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2020
·
IF 7.246
Muhammad Asad Saleem,Liujun Pei,Muhammad Faizan Saleem,Sumaira Shahid,Jiping Wang
Because of the prevailing issue of water scarcity , the application of non-aqueous media Decamethylcyclopentasiloxane (D5) was employed in the chemical fiber dyeing and washing process. Confocal laser scanning microscope (CLSM) and X-ray photoelectron spectroscopy (XPS) analysis have been carried out to analyze the penetration of D5 into the interior of nylon fiber and its distribution in fiber cross-section. The solubility of pure disperse dye in D5 has been measured to check the feasibility of dispersing agent exclusion from dyeing formulation. For developing the solvent dyeing and washing process for nylon, nylon fabric was dyed with pure disperse dyes in D5 solvent and washed with D5 without any process auxiliaries. Findings from CLSM and XPS spectrum showed that D5 can diffuse into the nylon fabric surface with and without the addition of accelerant. And accelerant doesn’t affect D5’s ability to penetrate and uniform distribution within the fiber structure. As compared to aqueous dyeing, the 30 and 43 percent increase in K/S was achieved for azo and anthraquinone dyes by using D5 as dyeing media. Furthermore, more than 99 percent solvent can be recycled or recovered. The level dyeing with commercial dyes under conventional dyeing conditions in D5 solvent dyeing media prove the commercial feasibility of this dyeing technology .
研究领域:
材料科学
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环境科学
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染料化学
✓ 已验证
DOI
高影响因子
TEXTILE RESEARCH JOURNAL
·
2023
·
IF 2.3
Liang Jin,Tao Qian,Yujun Cheng,Dongming Qi,John H. Xin,Gang Xia,Zhihua Cui
Dye wastewater has attracted great attention due to high pollution and toxicity which can cause harm to the living environment. It is common for azo-disperse dyes to be used to dye hydrophobic fibers. A reduction clearing method is used to eliminate the dye particles on the fabric after dyeing. However, when azo disperse dyes on the fiber surface are eliminated by the reduction clearing process, this can give rise to an effluent discharge due to the presence of sodium hydrosulfite. The introduction of carboxylic ester groups into dye molecules can effectively avoid this issue. Six novel environmentally friendly alkali-clearable disperse dyes, containing cyano and carboxylic ester groups, were readily synthesized by a diazo coupling reaction with various diazo components. Their dyeing properties on polyethylene terephthalate fabrics were respectively measured and compared with those of commercial reference dyes. It was indicated that some fastness properties of the synthesized dyes on polyethylene terephthalate fabrics after the alkali clearing were improved compared with those of the reference dyes due to the existence of the carboxylic ester group. Moreover, the chromaticity of dye wastewater can be further reduced by recovering hydrolyzed dyes.
研究领域:
染料化学
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环境科学
·
纺织材料学
✓ 已验证
DOI
高影响因子
Polymers
·
2019
·Vol. 11
·期 3
·520
·
IF 3.164
Jiping Wang,Wenqing Cheng,Yuanyuan Gao,Lei Zhu,Liujun Pei
Disperse dyeing for polyethylene terephthalate (PET) fiber in different non-aqueous solvent dyeing systems have been extensively studied over the past decades. In the present work, disperse dyeing for PET was investigated in a silicone solvent dyeing system. The influence of accelerant on the fiber swelling, uptake of dye, K/S value of dyed fiber, and dye solubility in the silicone solvent were systematically investigated. Compared with no accelerant, the final uptake of the disperse dye (C. I. Disperse Blue 367) could increase to 81% with 20% accelerant in the silicone solvent dyeing system, and the K/S value of dyed fiber was also higher (3.3 for no accelerant vs. 13.2 for accelerant). The influence of accelerant on the performance of disperse dyeing was also studied. Firstly, the solubility of the disperse dye in the silicone solvent can be decreased by the accelerant. Moreover, the solubility of the disperse dye is inversely proportional to the K/S value and the uptake of the dye. In addition, although the silicone solvent can diffuse to the inner fiber and has a partial swelling in the PET fiber, the swelling of PET can be improved by the accelerant. Furthermore, the swelling of fiber can reach equilibrium when the amount of accelerant was 15% (the weight of fiber). Therefore, this eco-friendly dyeing technology has considerable potential for application to a broad array of chemical fibers.Keywords:PET fiber;disperse dye;silicone solvent;accelerant;solubility;swelling
研究领域:
纺织化学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
DYES AND PIGMENTS
·
2020
·
IF 4.613
Shuaijun Fang,Gaofeng Feng,Yuqiu Guo,Weiguo Chen,Hongfei Qian
A series of new azo disperse dyes containing the urethane group were synthesized through the reaction between the hydroxyl group in coupling component of disperse dyes and p-toluene isocyanate. The structures of the new dyes were fully confirmed by 1 H NMR, 13 C NMR, FT-IR, MS and Elemental analysis . Their characteristics for the visible-light absorption and color fastness on polyamide fibers were respectively measured and compared with those of the original dye. It was found that the new dyes exhibited hypsochromic effect, and had the nearly unchanged absorption half band and higher molar extinction coefficients , the fastness properties has been greatly improved, especially for the washing and sublimation fastness. The new dyes 2d and 2e containing double urethane groups possessed excellent fastness properties on polyamide fabrics. These two dyes for all the fastness tested, including water fastness, sublimation fastness, rubbing fastness and light fastness, had reached 4–5 and 5 rates. It was very clear that the introduction of urethane group and the increase of molecular weight can effectively improve the fastness of disperse dyes for the polyamide fibers.
研究领域:
化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Cleaner Production
·
2021
·
IF 9.297
Wenqing Cheng,Liujun Pei,Muhammad Asad Saleem,Lei Zhu,Jiping Wang
Clean dyeing technologies for polyester textiles, particularly waterless dyeing, have been studied extensively in recent decades. In the present work, a new waterless dyeing technology, the silicone medium dyeing, for polyester textiles had been investigated. The dyeing process of polyester textile in the silicone medium was optimized by determining the dyeing temperature, holding time, type and dosage of dye accelerator. The dye uptake of disperse dye and the fastness properties of the dyed polyester were equivalent to those of conventional water-bathed dyeing. After dyeing, polyester textile had a better color levelness. From the TGA and XRD results, it can be proved that silicone medium has no adverse effects on the fiber and can be used as a dyeing medium. The influence of the increase of halogen in the diazotized component on the affinity, dye uptake, diffusion coefficient , and other parameters was obtained by analyzing the dye uptake of C.I. Disperse Orange 44 and C.I. Disperse Yellow 163. These parameters formulate guidelines for the selection of disperse dyes for silicone medium dyeing system. To verify the feasibility of industrialization, pilot-scale dyeing was carried out. The results showed that, as compared to aqueous dyeing, higher colorfastness and better color levelness were obtained from silicone media. Therefore, this eco-friendly dyeing technology has considerable potential to become a mainstream dyeing method in the foreseeable future.
研究领域:
纺织科学
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环境科学
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染整工程
✓ 已验证
产品关联
DOI
高影响因子
AATCC Journal of Research
·
2022
·
IF 0.726
Jingming Huang,Hongjuan Zhang,Liujun Pei,Jiping Wang
In this paper, two disperse dyes with different substituents were selected to dye polyester fabrics in decmethylcyclopentasiloxane (D5) medium. The structures and dyeing performance of the two dyes were studied and compared. The results showed that dyes with lower solubility in D5 medium had higher dyeing rates. DFT calculations showed that large steric hindrance of cyano groups on diazo components contributed to improving the dyeing rate. This was due to the generation of more monomolecular dyes by destroying π-π stacking interactions. These results provide theoretical guidance for improving the exhaustion and further promote the industrial development of disperse dye in a D5 dyeing system.
研究领域:
化学
·
材料科学
✓ 已验证
DOI
高影响因子
DYES AND PIGMENTS
·
2017
·
IF 3.473
Hong-Fei Qian,Gaofeng Feng,Gang Bai,Yan-Chun Liu,Ling-Ling Hu
To look for a way to improve the fastness properties of disperse dyes on PU fibers, six diurethane/diester tethered azo disperse dyes were prepared and applied to the dyeing of polyurethane fibers. Their detailed adsorption behaviors including the dyeing rate, build-up properties, surface-adsorbed state of dyes and colorimetric properties were investigated as well as compared with those of non-tethered azo dyes . The results showed that there were great differences in adsorption properties between the two types of dyes. The excellent build-up performance of the non-tethered dyes was caused by the crystal growth on the surface of polyurethane fibers, and the serious aggregation of dyes on the surface of fibers would alter the color shade, decrease the chroma and produce poor colorfastness properties. When the tethered dyes were applied to polyurethane fibers, owing to their larger molecular sizes, a higher temperature (120 °C) was needed to finish the dyeing process within a conventional time of 30–40 min, and the crystal growth on the surface of polyurethane fibers was obviously restricted, so that the color of dyed PU fibers became bright and the colorfastness was notably improved. With additional dye concentration, a medium color depth was obtained. It was further demonstrated that the tethering modification of azo disperse dyes to enhance the colorfastness on polyurethane fibers was feasible.
研究领域:
化学工程
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材料科学
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纺织科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2016
·
IF 5.267
Min Li,Wujun Ma,Liping Zhang,Christiana Agbo,Shaohai Fu
Five disperse dyes (D1–D5) with 2,6-bichlor-4-nitroaniline or 2-chloro-4-nitroaniline as the diazo component and N-substituted anilines as the coupling component were designed and synthesized in order to compare the differences derived from their molecular structure. All the synthesized disperse dyes were characterized by FT-IR, 1H NMR, and elemental analysis. Their spectral property was evaluated with respect to visible absorption properties in various solvents of distinguishable polarity. The synthesized disperse dyes were applied on one-step dyeing of polyethylene terephthalate (PET) fabric. The alkali stability of the dyes in case of one-step dyeing at various NaOH concentrations was discussed by comparing color parameters of the dyed PET fabrics. Besides, the alkali stability of the dyes was investigated with respect to the nature of chemical constitution and the substituents therein by X-ray crystal diffraction analysis. The results show that D4 and D5 have excellent alkali stability and can combine pretreatment and dyeing in an alkali bath, which could be attributed to the head-to-tail compact structure, intramolecular and intermolecular forces and large sterically hindered group (−CH2–Ph). The levelness and color fastness as well as mechanical properties of the dyed PET fabrics with a one-step dyeing method were measured by an ISO standard method.
研究领域:
化学工程
·
材料科学
·
纺织科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 142
·期 2
·e56336
·
IF 2.7
Xiaoxu Zhao,Rui Zhang,Shuchen Cao,Na Chang,Hao Zhang
In this paper, a starch-based flocculant (ADSt) with medium and low temperature solubility and enhanced flocculation effect was synthesized using corn starch, acrylamide, and dimethyldiallyl ammonium chloride as main materials by the ethanol-alkali method and grafting method. The main mechanism of ADSt's flocculation was electrical neutralization and bridging. The flocculation performance of ADSt was verified by using it along with polymeric aluminum chloride (PAC) as coagulant/flocculant, dispersible dye (dispersible yellow RGFL), and reactive dye (active trimeric blue KN-G) to simulate dye wastewater. For the dispersed yellow water sample and active emerald blue water sample, the dosage of PAC was 40 and 35 mg/L respectively. When the dosage of ADSt was 10 mg/L with a dye content of 100 mg/L, the decolorization rates for both dyes reached up to 96.2% and 94.4% respectively. The properties of the flocs such as size and two-dimensional fractal structure were described. The prepared ADSt maintained a good flocculation effect in the pH range of 5–9 due to its excellent water solubility achieved through the ethanol-alkali preparation process, where its solubility reached 86.7% at 30°C. Overall, the preparation process for ADSt is simple, cost-effective, while providing an effective solution for treating printing and dyeing wastewater.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
DYES AND PIGMENTS
·
2019
·
IF 4.018
Huanhuan Li,Hong-Fei Qian,Gaofeng Feng
A novel approach has been established for accessing structurally diverse azo disperse dyes with improved fastness properties by employing an Ugi four-component reaction (Ugi-4CR). The process includes three steps: (1) Ugi-4CR of aniline, cyclohexyl isocyanide, formic acid , and an aromatic aldehyde; (2) selective hydrolysis of amide functionality in the Ugi product; and (3) coupling the hydrolysis product with an aryl diazonium salt. Employing Ugi-4CR herein had advantages over easily controlling the molecular weight/size of the dye. Six new azo disperse dyes were synthesized and their structures were fully characterized by 1 H NMR, 13 C NMR, MS, and FT-IR. It was found that the washing and sublimation fastness properties of the obtained azo disperse dyes on both poly (ethylene terephthalate) (PET) and nylon fibers were remarkably improved as compared with conventional C.I. Disperse Orange 3. The improved fastness properties should be attributed to the moderately increased molecular weight/size and the amide functionality introduced in Ugi-4CR.
研究领域:
化学
·
染料合成
✓ 已验证
产品关联
DOI
高影响因子
Journal of Cleaner Production
·
2020
·
IF 7.246
Yawei Song,Kuanjun Fang,Mohd Nadeem Bukhari,Kun Zhang,Zhiyuan Tang,Rongqing Wang
Dye/polymer nanosphere is a novel kind of colorant that can significantly enhance the dye utilization efficiency on textile. In order to improve the coloration ability of colored nanospheres, disperse dye/P(St-MAA) nanospheres with rough surface were successfully prepared through alkali pretreatment at pH 12 and coloration of disperse dyes. TEM image and particle size analysis indicate that the colored nanospheres had rough surfaces with the average particle size of 158.1 nm. The dye content of colored rough nanospheres was 63.7 mg/g, higher than the un-alkali-treated ones. The reason for the change of morphology, particle size and dye content was due to the swelling of nanospheres at alkali condition. The XRD , TGA and DSC diagrams show that the disperse dye molecules formed strong interaction with the macromolecular chains and aggregated to form crystals in the rough nanospheres. The printed cotton fabric shows higher color performance using the colored rough nanospheres because of the lower visible light reflectance. The printed fabric also exhibits satisfactory color fastness for practical application.
研究领域:
材料科学
·
纺织工程
·
染料化学
✓ 已验证
DOI
高影响因子
FIBERS AND POLYMERS
·
2021
·Vol. 22
·期 2
·396-404
·
IF 2.153
Zhang Lu,Zhou Qingquan,Zhang Qipeng,Wu Minghua
To further improve the color yield and color fastness of disperse dyes (DDs) in washing-free printing, fluorosilicone-modified polyacrylate (FSMPA) was prepared as a new washing-free printing binder. The structure, thermal behaviors, surface characteristics, and washing-free printing properties of FSMPA were intensively investigated. The migration-diffusion-fixation mechanisms of DDs from a polymer binder film to PET were tentatively explored. The results showed that when the molar ratio of 1,3,5-tris(3,3,3-trifluoropropyl) methylcyclotrisiloxane (D 3 F ) to octamethylcyclotetrasiloxane (D 4 ) was 1:10 in the preparation of the modifier double-terminated vinyl polyfluoroalkyl siloxane (DVFS) and the dose of DVFS in the preparation of FSMPA was 9%, the printed polyester fabric exhibited excellent washing-free printing properties. Compared with polyacrylate (PA) and silicon-modified polyacrylate (SMPA), FSMPA has better color yield and color fastness. The glass transition temperature of FSMPA was decreased, the enrichment of fluorosilicone chains on the surface of FSMPA film was facilitated, and the hydrophobicity of FSMPA was improved. Thus, the difference in solubility parameters between the DDs and polymer binder film was increased, and the migration of the DDs from the FSMPA film to the PET substrate was promoted.
研究领域:
材料科学
·
纺织工程
·
染整技术
✓ 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）