Kovalenko V. Determination of the applicability of Zn-Al layered double hydroxide, intercalated by food dye orange yellow S, as a cosmetic pigment = Визначення можливості застосування Zn-Al подвійно-шарового гідроксиду, інтеркальованого харчовим барвником Orange Yellow S, як косметичного пігменту / V. Kovalenko, V. Kotok // Вост.-Европ. журн. передовых технологий. - 2020. - № 5/12. - С. 81-89. - Бібліогр.: 58 назв. - англ.Nail polish, in particular gel nail polish, is the most used cosmetic product. The components of the gel polish, which determine both toxicity and consumer color properties, are pigments. Zn-Al layered double hydroxides intercalated with anionic food dyes are promising pigments for use in gel polish. The parameters of the samples of Orange Yellow S-intercalated Zn-Al (Zn:Al = 4:1 and Zn:Al = 2:1) hydroxides synthesized at pH = 8 and pH = 11 were studied. The crystal structure of the samples was studied by X-ray phase analysis and thermogravimetry, and the pigment properties - by the method of measuring and calculating color characteristics in the CIELab and XYZ systems. The color characteristics of gel nail polish samples prepared using synthesized pigments were studied in a similar way. X-ray phase analysis and thermogravimetry showed that Zn-Al-Orange Yellow S pigments synthesized at both Zn:Al ratios and pH were layered double hydroxides with the <$Ealpha>-Zn(OH)2 structure. The phenomenon of the decomposition of Zn-Al LDH to ZnO during the synthesis was revealed. As a result, all Zn-Al-Orange Yellow S pigment samples contained both layered double hydroxide and zinc oxide. It was shown that all samples of the Zn-Al-Orange Yellow S pigment obtained at pH 8 and 11 and the ratios Zn:Al = 4:1 and Zn:Al = 2:1 had high pigment characteristics and are promising for use in gel polish. The samples of gel nail polish with synthesized pigments have a red-orange color (сolor tone 595 - 604 nm) with high monochromaticity (color purity 63 - 75 %) and color saturation (48,7 - 58,3). Індекс рубрикатора НБУВ: Л745.42 + Л684/685-3
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