Popa Simona, Radulescu-Grad Maria Elena, Perdivara Alina, Mosoarca Giannin
Faculty of Industrial Chemistry and Environmental Engineering, Politehnica University of Timisoara, V. Parvan Bd. No. 6, 300223, Timisoara, Romania.
"Coriolan Dragulescu" Institute of Chemistry, Romanian Academy, Mihai Viteazul Bd. No. 24, 300223, Timisoara, Romania.
Sci Rep. 2021 Mar 15;11(1):5889. doi: 10.1038/s41598-021-85452-7.
The aim of this study was the colour fastness investigation of the new synthetized direct symmetrical azo-stilbene dye, using two of the film field domain reference tests, namely the wet-scrub and the UV tests. The dye was incorporated in a water-based resin, and then was applied on a PCV foil. The film colour parameters were determined before and after 200 wet-scrub cycles. Further, the dye was mixed with an acrylo-polyurethanic resin and then was applied on an aluminium plate, which was exposed to UV radiation for 414 h. The film colour parameters were recorded periodically. The maxima of the reflectance spectra depend on the UV time exposure. The quality of the film was analysed by the degree of gloss. A second focus was the elimination of the dye's traces from wastewaters (these may be resulted from the industries which apply surface coating methods), using the active carbon powder. The main operational adsorption process parameters influence were investigated. Equilibrium, kinetic and thermodynamic studies were performed. The adsorption process was confirmed by the CIELab* colour space analysis. All colour studies were investigated using UV-Vis spectroscopy.
本研究的目的是使用两种薄膜领域参考测试方法，即湿擦洗和紫外线测试，对新合成的直接对称偶氮 - 芪染料的色牢度进行研究。将该染料掺入水基树脂中，然后涂覆在聚氯乙烯箔上。在200次湿擦洗循环前后测定薄膜颜色参数。此外，将该染料与丙烯酸 - 聚氨酯树脂混合，然后涂覆在铝板上，铝板暴露于紫外线辐射414小时。定期记录薄膜颜色参数。反射光谱的最大值取决于紫外线照射时间。通过光泽度分析薄膜质量。第二个重点是使用活性炭粉末从废水中去除染料痕迹（这些痕迹可能来自应用表面涂层方法的行业）。研究了主要操作吸附过程参数的影响。进行了平衡、动力学和热力学研究。通过CIELab*颜色空间分析证实了吸附过程。所有颜色研究均使用紫外 - 可见光谱法进行。
