Comparative study of titanium dioxide to improve the quality of finished cosmetic products / Dominika Swiatczak in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 45, N° 3 (06/2023)  

[article]  inINTERNATIONAL JOURNAL OF COSMETIC SCIENCE > Vol. 45, N° 3 (06/2023) . - p. 315-328 Titre : Comparative study of titanium dioxide to improve the quality of finished cosmetic products Type de document : document électronique Auteurs : Dominika Swiatczak, Auteur ; Sylwia Belica-Pacha, Auteur ; Anna Zawisza, Auteur ; Aneta Kisielewska, Auteur ; Agata Swiatly-Blaszkiewicz, Auteur ; Bogumila Kupcewicz, Auteur ; Bartosz Bartosewicz, Auteur ; Bartlomiej J. Jankiewicz, Auteur ; Magdalena Malecka, Auteur Année de publication : 2023 Article en page(s) : p. 315-328 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Couleur Dioxyde de titane Ingrédients cosmétiques Pigments inorganiques -- Analyse Index. décimale : 668.5 Parfums et cosmétiques Résumé : - Objective : Titanium dioxide (TiO2) pigments (pure) or with a hydrophobic coating of triethoxycaprylylsilane (TECSi) used in cosmetics. Using different methods, we studied properties of commercially available pure and coated pigment. We determined the elemental composition of pigments that differ in their behaviour in a cosmetic formulation. The significant differences in the coating composition were revealed. - Methods : UV–Vis absorption spectroscopy allowed us to investigate the pigment purity and determined the polymorph form in pigments. FTIR was employed to identify functional groups present in the samples with the modified surface. XRD, DLS, TEM and DCS were applied to characterize particle size and morphology. The experiment of ED-XRF method was used to determine the elemental composition of pigments that differ in their behaviour in a cosmetic formulation. - Results : UV-Vis spectroscopy was used to detect organic pollutants in particular batches, which were not detected in the cases of the tested samples. Solid UV-Vis spectroscopy and XRD revealed which crystalline form of TiO2 is present in pigments. TEM and DLS methods were used to characterize particle size and morphology as well as DCS method, which provide more accurate information about form (separated or clustered particles) of pigments' particles in suspensions. Based on FTIR spectra, the presence of a coating in the raw material was identified, and the tell-tale signal of the silane group. On the contrary, spectroscopy of washed-out product can identify the well or poorly modified pigment. Applying ED-XRF, it turned out that the content of silicon (and consequently of the TECSi) was lower than that declared by the manufacturer. - Conclusion : Our data indicate how we can recognize poorly coated pigments in raw material. The results show that ED-XRF method is nondestructive, effective and fast, hence, can be successfully introduced into preproduction pigment control in cosmetic industry. Note de contenu : - MATERIALS AND METHODS : Materials and its characteristics - UV–vis spectrophotometry in solution and solid - NMR spectroscopy - X-ray powder diffractometry - FTIR spectroscopy - Energy-dispersive X-ray fluorescence (ED-XRF) - Microscope image - DLS-Dynamic light scattering - Transmission electron microscopy - Differential centrifugal sedimentation - RESULTS : UV–vis spectrophotometry - H NMR spectroscopy - Structural Characteristics - FTIR spectroscopy - Energy-dispersive X-ray fluorescence (ED-XRF) - Microscopic image - TEM-Transmission electron microscopy and DLS-dynamic light scattering - DCS-differential centrifugal sedimentation - Table 1 : Composition of raw materials listed in the publication - Table 2 : Composition of triethoxycaprylylsilane (C14H32O3Si) - Table 3 : Content of silicon and TECSi in the tested samples calculated based on the calibration curve DOI : https://doi.org/10.1111/ics.12836 En ligne : https://drive.google.com/file/d/1THkm0Of9SKNx8ZIGyjpC07hMkmc9yEcF/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39563 [article]

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