Cheng Yu-Wen, Benas Jean-Sebastien, Liang Fang-Cheng, Lin Shang-Ming, Sun Ting-Wang, Liu Fu-Chieh, Yu Yang-Yen, Kuo Chi-Ching
Institute of Organic and Polymeric Materials, Research and Development Center of Smart Textile Technology, National Taipei University of Technology, No. 1, Sec. 3, Chung-Hsiao East Road, Taipei 10608, Taiwan.
Department of Materials and Textiles, Asia Eastern University of Science and Technology, New Taipei City 220303, Taiwan.
Polymers (Basel). 2022 Jul 26;14(15):3020. doi: 10.3390/polym14153020.
Supercritical carbon dioxide dyeing (SCDD) not only enables strong dyeing performance for a versatile range of polymer material but is also regarded as a green chemical media due to its low environmental impact as well as low risk of product denaturation. Over the decades, azo disperse dyes have been revealed to be efficient dyes and represent the wide majority of dyeing material. Azo dyes possess a wide variety of functional groups to optimize dye synthesis and tune the light absorption properties. Using SCDD, end-chain of different lengths, and functional group exhibiting various electronic affinity, six disperse red azo dyes were synthesized to investigate dyeing performances as woven fabric type, color strain, and color fastness after dyeing are discussed. Dye structure synthesized through a coupling reaction was confirmed by H NMR and mass spectroscopy. We found that the light absorption wavelength and absorption coefficient value variation are associated to the nature of the functional group. From the color strength values of the polyethylene terephthalate woven after dyeing, we find that the fiber host and dye dopant chemical structure greatly influence the dyeing process by providing enhanced woven, color strain, and color fastness. In comparison with commercial products, our approach not only improves the dyeing process but also guarantees a strong resistance of the dyed product against water, detergent, perspiration, abrasion, and friction.
超临界二氧化碳染色（SCDD）不仅对多种聚合物材料具有出色的染色性能，还因其对环境影响小以及产品变性风险低而被视为一种绿色化学介质。几十年来，偶氮分散染料已被证明是高效染料，并且占染色材料的绝大部分。偶氮染料拥有各种各样的官能团，可优化染料合成并调节光吸收特性。利用SCDD，合成了不同长度的端链以及具有各种电子亲和力的官能团的六种分散红偶氮染料，以研究其染色性能，并讨论了织物类型、色变和染色后的色牢度。通过偶联反应合成的染料结构通过核磁共振氢谱（H NMR）和质谱进行了确认。我们发现光吸收波长和吸收系数值的变化与官能团的性质有关。从染色后的聚对苯二甲酸乙二酯织物的色强度值来看，我们发现纤维主体和染料掺杂剂的化学结构通过提供增强的织物性能、色变和色牢度，极大地影响了染色过程。与商业产品相比，我们的方法不仅改善了染色过程，还确保了染色产品对水、洗涤剂、汗液以及磨损和摩擦具有很强的抵抗力。
