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Sustainable dyeing of nylon with disperse dyes in Decamethylcyclopentasiloxane waterless dyeing system
Journal of Cleaner Production ( IF 9.7 ) Pub Date : 2020-07-28 , DOI: 10.1016/j.jclepro.2020.123258
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.



中文翻译:

十甲基环五硅氧烷无水染色系统中分散染料对尼龙的可持续染色

由于普遍存在缺水问题,在化学纤维的染色和洗涤过程中使用了非水介质十甲基环五硅氧烷(D5)。已经进行了共聚焦激光扫描显微镜(CLSM)和X射线光电子能谱(XPS)分析,以分析D5在尼龙纤维内部的渗透及其在纤维截面中的分布。已测量纯分散染料在D5中的溶解度,以检查从染色配方中排除分散剂的可行性。为了开发尼龙的溶剂染色和洗涤方法,将尼龙织物用纯分散染料在D5溶剂中染色,然后用D5洗涤,而无需任何工艺助剂。从CLSM和XPS光谱中发现,D5可以在添加和不添加促进剂的情况下扩散到尼龙织物表面。促进剂不会影响D5渗透并均匀分布在纤维结构内的能力。与水性染色相比,使用D5作为染色介质,偶氮和蒽醌染料的K / S分别提高了30%和43%。此外,可以回收或回收超过99%的溶剂。在D5溶剂染色介质中,在常规染色条件下用商业染料进行的均染证明了该染色技术的商业可行性。通过使用D5作为染色介质,偶氮和蒽醌染料的K / S分别提高了30%和43%。此外,可以回收或回收超过99%的溶剂。在D5溶剂染色介质中,在常规染色条件下用商业染料进行的均染证明了该染色技术的商业可行性。通过使用D5作为染色介质,偶氮和蒽醌染料的K / S分别提高了30%和43%。此外,可以回收或回收超过99%的溶剂。在D5溶剂染色介质中,在常规染色条件下用商业染料进行的均染证明了该染色技术的商业可行性。

更新日期:2020-07-28
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