Molecularly engineered alkyl-anthraquinone dyes for sustainable textile dyeing in supercritical carbon dioxide

IF 4.4 3区工程技术 Q2 CHEMISTRY, PHYSICAL

Journal of Supercritical Fluids Pub Date : 2025-09-12 DOI:10.1016/j.supflu.2025.106782

Jinglong Li , Meiyu Zhen , Yutao Feng , Ziyi Lu , Chang Wang , Xiaoqing Xiong

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引用次数: 0

Abstract

Alkyl-chain anthraquinone dyes have promising performance but face application constraints due to hydrophobicity and pollution in conventional water-based dyeing. This study developed an eco-friendly synthesis and dyeing approach. Six dyes (AQ-5 to AQ-7, CAQ-5 to CAQ-7) were synthesized in supercritical carbon dioxide (scCO₂) via reactions of 1-chloroanthraquinone/1,5-dichloroanthraquinone with n-alkylamines. They showed good light absorption and thermal stability (5 % weight loss at 245–298°C, suitable for scCO₂ dyeing). Meanwhile, scCO₂ dyeing regularity was revealed through the synergistic regulation of multiple parameters. Optimal scCO₂ dyeing conditions for polyester were determined: 16 MPa, 130°C, 90 min for AQ-5–AQ-7; the optimal dyeing conditions for CAQ-5–CAQ-7 were determined and these were included in the range of 120–135 °C, 16 MPa, 70–100 min. Dyed fabrics had uniform fixation with excellent washing, dry, and wet rubbing over than grade 4, and good light fastness. This work establishes a green scCO₂ system, overcoming traditional limitations, and provides a theoretical basis for eco-friendly dyes/technologies.

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分子工程烷基蒽醌染料在超临界二氧化碳环境下的可持续染色

烷基链蒽醌染料具有良好的应用前景，但在传统的水基染色中存在疏水性和污染等问题。本研究开发了一种环保的合成和染色方法。以1-氯蒽醌/1,5-二氯蒽醌与正烷基胺为原料，在超临界二氧化碳（scCO₂）中合成了6种染料（AQ-5 ~ AQ-7、CAQ-5 ~ CAQ-7）。它们具有良好的吸光性和热稳定性（在245-298°C时失重5 %，适合scCO₂染色）。同时，通过多参数的协同调控，揭示了scCO₂的染色规律。涤纶的最佳scCO₂染色条件为：AQ-5-AQ-7为16 MPa， 130℃，90 min；确定了CAQ-5-CAQ-7的最佳染色条件为120 ~ 135℃，16 MPa, 70 ~ 100 min。染色织物固色均匀，洗涤、干湿摩擦均优于4级，耐光牢度好。该研究突破了传统的局限性，建立了绿色scCO₂体系，为环保染料技术提供了理论基础。

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来源期刊

Journal of Supercritical Fluids 工程技术-工程：化工

CiteScore

7.60

自引率

10.30%

发文量

236

审稿时长

56 days

期刊介绍： The Journal of Supercritical Fluids is an international journal devoted to the fundamental and applied aspects of supercritical fluids and processes. Its aim is to provide a focused platform for academic and industrial researchers to report their findings and to have ready access to the advances in this rapidly growing field. Its coverage is multidisciplinary and includes both basic and applied topics. Thermodynamics and phase equilibria, reaction kinetics and rate processes, thermal and transport properties, and all topics related to processing such as separations (extraction, fractionation, purification, chromatography) nucleation and impregnation are within the scope. Accounts of specific engineering applications such as those encountered in food, fuel, natural products, minerals, pharmaceuticals and polymer industries are included. Topics related to high pressure equipment design, analytical techniques, sensors, and process control methodologies are also within the scope of the journal.