INDUSTRIAL CROPS AND PRODUCTS
·
2025
·
IF 6.2
Long-Hao Yu,Xiang-Yang Zhao,Jian-Mei Xu,Jia-Jie Long
Reactive disperse dyes are of great significance for the anhydrous coloration of natural fibers in supercritical carbon dioxide (SCF-CO 2 ). In order to further disclose their coloration theory in supercritical carbon dioxide system, the coloration kinetics and thermodynamics of a special red dye SCFX-AYRL on silk fabric, mainly including coloration rate, effective adsorption isotherm model, coloration saturation value, coloration affinity and enthalpy, etc., were investigated at different system temperatures. The obtained results indicate that the coloration kinetics of the dye SCFX-AYRL on silk substrate was conformed to a pseudo-second order kinetic equation, companying with a maximum equilibrium adsorption amount ( q e (exp) ) at 7.95 mg g −1 and a shortest half-dyeing duration ( t 1/2 ) at 11.27 min at 120°C. The dye equilibrium adsorption amount increased with the increase of temperature, while the half-dyeing duration ( t 1/2 ) gradually decreased as the dyeing temperature was increased. The investigations on coloration thermodynamics show that the red dye SCFX-AYRL uptake behavior on silk in SCF-CO 2 was well consistent with Langmuir adsorption isotherm model, by involving saturation adsorption values ([ S ] f ) over 11.63 mol kg −1 to 19.39 mol kg −1 at different system temperatures. The affinity of the dye ( -Δμ °) for silk coloration in SCF-CO 2 decreased with increased temperature by accompanying with the highest value of 18.13 kJ mol at 80°C. The calculated dyeing enthalpy ( ΔH °) and entropy ( ΔS °) were −35.83 kJ moL −1 and −0.20 kJ K −1 ·moL −1 , respectively, indicating that the silk coloration in SCF-CO 2 was an exothermic and entropy decrease process. This basic study about the coloration kinetics and thermodynamics in this work is instrumental in disclosing and enriching the coloration theory and mechanism in SCF-CO 2 , which also promotes the development and application of this green and sustainable coloration method in practice to avoid heavy pollutions.
研究领域:
纺织化学
·
绿色染整技术
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超临界流体化学
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纤维材料科学
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环境友好工艺
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2023
·
IF 8.2
Qiuyu Zhu,Youping Yu,Hanchang Hu,Lei Wang,Xiang Mi
In this work, a salt-free and low alkali dyeing process was developed through cationic modification of cotton fabric with a series of quaternary ammonium salts (QAS). The dyeing performance indicated that the cationic cotton fabric treated with 3-chloro-2-hydroxypropyldimethyloctane ammonium chloride (CT-8) achieved better K/S value (8.87) and dye fixation (90.47 %) compared to the conventional dyeing process. Notably, the CT-8 treated fabric performed exceptionally under salt-free conditions and with a Na 2 CO 3 concentration of 5 g/L. The rationale behind the adoption of a salt-free and low-alkali dyeing process was attributed to the positive charge of quaternary ammonium groups, which had an augmenting impact on the hydroxyl reaction activity of cotton fabrics. The condensed Fukui function, atomic charge, and HOMO orbital calculations showed that the QAS structure could regulate the hydroxyl reactivity of cationic cotton fabric. Our salt-free and low alkali dyeing process not only achieved the aim of reducing chemical consumption and emissions, but also contributed to better understand the effect of hydroxyl reactivity of cationic cotton on the fixation reaction with reactive dye, and provided a new direction to achieve the require of sustainable development and clean production for a variety of industrial crops and products.
研究领域:
纺织科学
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材料化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Research and Technology-JMR&T
·
2023
·
IF 6.4
Yingjie Cai,Lexin Xiao,Mohammad Nazmul Ehsan,Tiancheng Jiang,Md Nahid Pervez,Lina Lin,Xiaorong Xiong,Vincenzo Naddeo
This investigation reported a mixture of natural dyes by employing the D5 solvent as a green penetration dyeing system for wool fiber. The ideal dyeing conditions were determined by conducting an in-depth analysis of the following variables: AEO-3 concentration, aqueous pick-up rate, solution pH, dyeing time, temperature, dye mass, and dye fixation percentage. Tensile strength and elongation were measured to learn more about the mechanical characteristics of the wool yarn after it was dyed in D5 solvent and water. The suggested dyeing parameters for wool yarn are 2% of AEO-3, 400% of the wool aqueous pick-up rate at pH 3, 90 °C temperature, and 90-min duration. This was determined by calculating the K/S value and the dye fixing rate. A washfastness of 4–5 on the fading scale and a stainfastness of 5 across the board were acquired. MR and GB dyes obtained a high dye fixation rate within 90–100%; however, GY dye achieved about 50% dye fixation rate. X-ray diffraction (XRD) patterns and thermogravimetric analysis (TGA) verified that the original and dyed wool fiber showed no change in interplanar distance in crystallinity and stable thermal tendency due to the dyeing process. The morphology of the wool's surface was not altered throughout the dyeing process, and the colors were spread uniformly over the fiber in SEM pictures and cross-sections. Finally, natural dyes in a D5 solvent media may be used to produce a ternary color, laying the groundwork for natural dyes to be further industrialized.
研究领域:
纺织科学
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材料科学
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染整工程
✓ 已验证
DOI
高影响因子
RSC Advances
·
2022
·Vol. 12
·期 46
·29767-29776
·
IF 4.036
Lina Lin,Lexin Xiao,Le Li,Cong Zhang,Md. Nahid Pervez,Vincenzo Naddeo,Youqing Zhang,Md. Shahinoor Islam,Yingjie Cai,Mohammad Mahbubul Hassan
Traditional grass cloth has been used in China for a long time for the manufacturing of various household furnishing textiles and ladieswear. However, traditionally the grass cloth is dyed with reactive dyes in an aqueous medium, but the dyeing process is not sustainable because of high energy and water usage and the production of coloured effluent. In this work, the possibility of palm oil/water dual-phase dyeing of traditional grass cloth with a reactive dye, C.I. Reactive Blue 194 (Reactive Blue 194), was explored. The grass cloth soaked in an alkaline solution with 80–140% pick-up was dyed in a palm oil dyebath containing dye powder dispersed in a palm oil medium. The initial study confirmed that the pre-treatment of the fabric with an alkaline solution with 140% pick-up was beneficial for the uniform distribution of the dye in the fibres. The dyeing process parameters (e.g., fixation temperature, solution pH, and fixation time) for the grass cloth dyeing with the Reactive Blue 194 were optimised by using the Taguchi method. The pH of the alkali pre-treatment solution was found to be the most influential factor, as confirmed by the analysis of variance in terms of the percentage of contribution (94.41%), which was statistically significant (P < 0.05). The confirmation tests were carried out under optimal settings, and a higher K/S (24.06) was found compared with the initial condition (21.51). X-ray diffraction analysis indicated that the dyeing process did not affect the crystallinity of the grass cloth fibres. Furthermore, the recovery of palm oil from the spent dyebath was around 99%, and up to five times recycling and reuse of palm oil were studied for the dyeing of grass cloth. The colour strength of the grass cloths dyed in the palm oil recycled up to five times was similar to the cloth dyed in fresh palm oil. The results show that palm oil can be used as a dyeing medium for the sustainable dyeing of grass cloth with effluent reduction, which can be extended to the dyeing of other textile fibres.
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
DOI
高影响因子
GREEN CHEMISTRY
·
2022
·Vol. 24
·期 15
·5904-5917
·
IF 11.034
Zhe Jiang,Yifan Cui,Guolin Zheng,Yimin Wei,Qiang Wang,Man Zhou,Ping Wang,Yuanyuan Yu
With the increase in environmental protection awareness, the development of strategies to reduce effluent and lower the cost of the chemical reagents used in the textile wetting process has attracted wide attention. Wool is a representative natural protein fiber with good warmth retention and durability. However, owing to the presence of a dense and chemically inert scale layer on the surface, woolen fabric has poor dye absorption ability, and the wool dyeing process is generally accomplished under the conditions of high dye concentration, salt and an appropriate boiling temperature. Therefore, the development of a novel dyeing approach is important to overcome these limitations to some extent. In this study, a new water-free recyclable dyeing process that uses natural and an acidic deep eutectic solvent as the water-free medium was established for dyeing woolen fabric. The process could be completed by using only the dye and the deep eutectic solvent without other assistant reagents. The wool samples dyed in the acidic deep eutectic solvents had higher color strength (K/S value), similar colorfastness, satisfactory leveling properties, and acceptable mechanical behavior compared with those dyed using the conventional aqueous method. The deep eutectic solvent also could be used as a cleaning solvent to remove the excess dye adhering to the fabric surface after the dyeing process, and the dye-containing solvent could be reused at least 10 times. Thus, the cost, chemical reagent consumption, and waste production of the developed dyeing process were low. Several dyes and acidic hydrogen-bonding ligands of deep eutectic solvents were successfully applied to dyeing wool using this deep eutectic solvent dyeing method. This favorable result indicates that this method has satisfactory universality and the potential for industrial application. Together, the results indicate that this method meets the 3R principles of reducing waste, recycling resources and reusing. This investigation broadens the application field of deep eutectic solvents in the textile industry and can contribute to the further development of green approaches for textile dyeing and finishing.
研究领域:
纺织科学
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环境科学
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材料化学
✓ 已验证
DOI
高影响因子
AATCC Journal of Research
·
2021
·
IF 1.127
Wencheng Tang,Liujun Pei,Hongjuan Zhang,Lei Zhu,Jiping Wang
To investigate the influence of cotton wettability on its dyeing properties in a silicone non-aqueous dyeing system, alkali pretreatment was performed before dyeing. The dyeing properties and dyeing kinetics of reactive dyes in the non-aqueous system and a conventional dyeing system were compared. Alkali pretreatment significantly improved the wettability of cotton fiber by removing wax and pectin. The adsorption rate of dye increased with increased cotton fiber wettability using the non-aqueous system, while it barely changed using the conventional system. Pseudo-second-order kinetics fit well with dye adsorption for both systems. Dye fixation improved by 30% at a concentration of 2% owf, along with better levelness and color depth of the dyed cotton fiber, using the silicone non-aqueous system without salts and dispersants.
研究领域:
纺织科学
·
环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
European Journal of Wood and Wood Products
·
2025
·Vol. 83
·期 2
·1-11
·
IF 2.5
Liu Wensheng,Yu Fanjun,Gui Chengsheng,Shen Yunfang,Qiu Zhe,Xiao Zefang,Zhang Tianpeng,Xie Yanjun
Currently, wood dyeing technology plays an important role in its enhancing aesthetics and market competitiveness. However, still facing the dual challenges of insufficient color fastness of dyeing and environmental pollution caused by dye wastes generated during the dyeing process. Herein, an efficient and environmentally friendly dyeing method was proposed to improve color fastness utilizing chemisorption and electrostatic adsorption in low concentration dyeing solution. The chemical modification of Ayous wood using 2,3-epoxypropyltrimethylammonium chloride was carried out by introducing the cationic groups to reduce the dyeing resistance and increase the binding force of dye molecules on the wood. Kinetic and thermodynamic analyses revealed that the adsorption behavior between cation-modified bleached wood (CBW) and acid dyes adheres to the quasi second-order kinetic model (R 2 = 0.98) and Freundlich isothermal model (R 2 = 0.91), suggesting an adsorption process in which chemical adsorption dominated. Therefore, there was a significant increase in color fastness. Compared to the traditional dyeing method, the quantity of dyes consumed in this method can be reduced by 40%, significantly diminishing the environmental load of dyeing waste liquid. This study offers an efficient and environmentally friendly modification strategy for wood dyeing, highlighting a potential of CBW for practical applications.
研究领域:
木材科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Linjie You,Weiguo Chen,Dongming Qi,Zhihua Cui,Sateesh Bandaru
Cotton fabrics, as both a polysaccharide and a high-molecular-weight polymer, are typically dyed with reactive dyes, which require a high amount of salt and produce significant colored effluent, increasing treatment complexity. This paper presents a novel and revolutionary reactive dyeing technique based on diazo pre-activation and coupling coloration of cotton fibers, which is distinct from conventional reactive dyeing methods. It demonstrates a room-temperature, salt-free reactive dyeing method to address problems like high energy consumption, significant salt usage, wastewater treatment challenges, the long duration from dye preparation to application, and the difficulty of recycling cotton fibers in reactive dyeing processes. This method combines dye preparation and dyeing by amination, diazotization, and coupling. It produces salt-free, room-temperature dyeing in <4 h, which is substantially less time than a standard reactive dyeing procedure that requires both dye synthesis and application. Furthermore, cotton fabrics can be endowed with bright, deep, and diverse colors, achieving superior colorfastness with ratings of 3–4 or more and K / S values exceeding 12. Moreover, dyed cotton fabrics can be easily decolorized by alkaline washing, producing alkaline washed cotton (AWC), while preserving their good whiteness and recyclable nature.
研究领域:
纺织科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Science Advances
·
2025
·Vol. 11
·期 35
·
IF 12.5
Juan Bai,Hanhan Wei,Siling Hu,Yi Guo,Qifan Zhang,Xiaokun Liu,Chenhuan Xu
The measurement of three-dimensional genome folding in the nucleus, mostly through Hi-C methods, is expressed as contact frequencies between genomic segments, without anchoring to physical axes of the spherical nucleus. Here, we mapped the chromatin contacts along nuclear radial axis and built radial score by factoring in contact frequencies. The chromatin high-order structures exhibit rich diversity along radial axis. Furthermore, the proximal trans contacts retrieved by radial score reveal conserved active/inactive chromatin segregation across intra- and interchromosomal interactions. Ablation of CTCF proteins disrupts chromatin loops with mild changes to chromatin radial positioning. By acutely perturbing multiple transcription factor (TF) occupancy, chromatin loop dissolutions are often accompanied by radial dissociations between two anchors. Our work provides a genome architecture reference map adhering to nuclear physical axis and suggests that multiple architectural TFs collectively shape nuclear positioning of chromatin and their contacts, with contacts serving as forces on chromatin positioning as well.
研究领域:
分子生物学
·
基因组学
·
细胞生物学
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表观遗传学
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生物信息学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 139
·期 47
·e53178
·
IF 3.057
Fenghua Li,Man Liu,Dexiang Yan,Zonggong Yin,Jiahong Xiao,Bin Sun,Yuhong Shen,Tingting Gao,Qinze Liu,Guowei Zhou
With the current situation of high-energy consumption and high pollution in the textile industry, developing an eco-friendly and universal dyeing technology is urgently required. Towards this goal, in this study, the dyeing technology with room temperature, salt-free, zero release, and rapid cycle dyeing for 20 min was realized using a polymer of catechol and polyethyleneimine as a dye. The dyed fabrics exhibited washing, rubbing, and perspiration fastness characteristics for practical needs, mainly attributing to the hydrogen bonding and π–π interaction between the dye molecules and the fabrics. Benefiting from the unique dyeing technology, the dyed fabrics show excellent leveling properties and adjustable chromaticity. Importantly, the mussel-inspired coating strategies are universally applicable, so the dyeing technology can be applied to various fabrics. Consequently, the environmentally friendly dyeing process based on low-cost catecholamine polymers as a dye will have a broad application prospect in the printing and dyeing industry. Moreover, the antibacterial tests showed that dyed cotton cloth, mulberry silk, and polyester fabrics all have favorable antibacterial properties, especially dyed mulberry silk fabrics have a greater than 90% bacterial reduction rate for both Escherichia coli and Staphylococcus aureus .
研究领域:
纺织科学
·
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
DYES AND PIGMENTS
·
2024
·
IF 4.1
Lei Qian,Xiyu Song,Shuaijun Fang,Yu Wang,Hongfei Qian
We previously synthesized a group of carbamate-linked disazo disperse dyes that showed excellent fastness properties on polyester fabric by using the thermosol dyeing process. However, the color yield of the dyed fabric was not sufficiently high to be accepted by users, especially when using a high-temperature dyeing process. To further optimize the structures of disazo disperse dyes and observe the effect of the linking groups on the dyeing properties, in this work, we used p -phenylene diisocyanate or terephthaloyl chloride as crosslinking agents and aniline derivatives containing hydroxyl or amino groups as reactants to synthesize four disazo disperse dyes containing various characteristic groups, including ester, carbamate , amide , and urea groups. The structures of these new dyes were characterized by nuclear magnetic resonance, mass spectrometry , and Fourier-transform infrared spectroscopy analyses . The spectral properties in an N,N-dimethylformamide solvent were measured, the structural parameters of the dyes were calculated using the density functional theory method, and the dyeing properties were investigated by using high-temperature and thermosol dyeing processes, and also compared with these for the commercial dye, C·I.Disperse Red 153. The results showed that there were slight differences in the molar extinction coefficients and maximum absorbance wavelengths between the new dyes, but the effects of characteristic groups on the structural features and the dyeing properties of the new dyes were significant. The ester-linked dye (D1) had the highest color depth when a high-temperature process was used in the presence of 50 mL/L of methyl salicylate because of its highest ClogP (N-octanol/water partition coefficient) value, corresponding to its more hydrophobic nature, while all the other dyes produced lower color yields. When used in the thermosol dyeing process, the carbamate-linked dye (D2) yielded the highest color depth, followed by the ester-linked dye (D1) and amide-linked dye (D3), and the urea-linked dye (D4) produced the lowest color depth due to its highest hydrophilic properties. Finally, it was demonstrated that the new dyes had excellent color fastnesses except for the urea-linked dye (D4), which exhibited a slightly lower light fastness, While the commercial dye used as the control showed a relatively poor sublimation and light fastness although its color depth and chroma value performed slightly better than the new dyes as used by the thermosol dyeing process.
研究领域:
化学工程
·
材料科学
·
纺织科学
✓ 已验证
DOI
高影响因子
DYES AND PIGMENTS
·
2021
·
IF 4.889
Mengke Jia,Haina Hu,Xiaoqing Xiong,Lihua Lyu,Hongjuan Zhao,Shubiao Zhang,Jun Hou
Technology of supercritical carbon dioxide (scCO 2 ) dyeing has been used in dyeing synthetic and natural fibers . It is important to understand the scCO 2 dyeing mechanism owing to the possibility of using this knowledge to design dyes that are suitable for scCO 2 dyeing. Here, using the N-site and 4-site modification of 1,8-naphthalimide matrix, six fluorescent dyes ( 1 , 2 , 3 , 4 , 5 , and 6 ) with fluorescent properties were synthesized; dyeing performance and fluorescent images indicate that all the synthesized dyes can be utilized for scCO 2 dyeing wool fibers . Therefore, the dyed wool fibers possess not only conventional dyeing characteristics but also luminescent properties. Especially, the dyed wool fibers with solid free fluorescent dye 2 exhibit strong yellow-green fluorescence. Owing to the lack of proper fixation process, the fixation rate of these six fluorescent dyes on wool fibers was not relatively high. Thus, the dye 7 with an active group N-hydroxysuccinimide (NHS) was synthesized to improve the binding force between dyes and wool fibers and it can react with the –NH 2 group in wools, which results in that the fixation rate of the synthesized dye 7 reaches approximately 91% through chemical combination. Mass spectra prove that the byproduct of 7 reacting with the amino group of wool fibers is not corrosive to dyeing equipment, which realizes the eco-friendly fluorescent dyeing of wool fibers in scCO 2 . Our results proved that the fluorescent dyes with conjugated system can overcome the problem of fluorescence quenching in natural fibers. Meanwhile, our strategy of constructing fluorescent dyes and the proposed dyeing mechanism will be helpful to develop reactive disperse dyes that are suitable for scCO 2 dyeing.
研究领域:
化学
·
材料科学
·
纺织工程
✓ 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）