Supercritical carbon dioxide (SC-CO₂) dyeing technique is a powerful alternative method to conventional ones. In this work, the uptake behavior and the build-up performance of a special dye SCF-AOL2 involving a potential reactive group of β-ethylsulfone sulfate on cotton in SC-CO₂ was investigated. Particularly, a phase transfer catalytic method, involving series of reactions and a supposed mechanism in a supercritical fixation system was introduced for the special dye fixation by employing a phase transfer catalyst. The results show that the uptake behaviors of the special dye were significantly improved with temperature, pressure and duration in both pure and cosolvent involved SC-CO₂ systems. Moreover, the fixation efficiency and the color fastness of the uptake dye on the substrate were notably improved by employing the catalytic fixation method. Furthermore, the dye uptake and catalytic fixation behaviors were also verified with color measurement, dye fixation efficiency, FT-IR analysis and color fastness evaluation.

超临界二氧化碳（SC-CO ₂）染色技术是传统染色技术的强大替代方法。在这项工作中，研究了一种特殊染料 SCF-AOL2在 SC-CO _{2中的吸收行为和增染性能，该染料涉及棉花上的潜在活性基团}β-乙基砜硫酸盐。特别介绍了一种相转移催化方法，涉及一系列反应和超临界固定体系中的假设机制，用于采用相转移催化剂进行特殊染料固定。_{结果表明，在纯溶剂和共溶剂SC-CO 2}中，该特殊染料的吸收行为随着温度、压力和持续时间的增加而显着提高。系统。此外，采用催化固色法显着提高了上染染料在基材上的固色效率和色牢度。此外，还通过颜色测量、染料固色效率、FT-IR 分析和色牢度评价验证了染料的吸收和催化固色行为。