Utilisation of Tectona grandis (teak) leaf extracts as natural hair dyes / Natthawadee Tibkawin in COLORATION TECHNOLOGY, Vol. 138, N° 4 (08/2022)  

[article]  inCOLORATION TECHNOLOGY > Vol. 138, N° 4 (08/2022) . - p. 355-367 Titre : Utilisation of Tectona grandis (teak) leaf extracts as natural hair dyes Type de document : texte imprimé Auteurs : Natthawadee Tibkawin, Auteur ; Nungruthai Suphrom, Auteur ; Nitra Nuengchamnong, Auteur ; Nantaka Khorana, Auteur ; Pensri Charoensit, Auteur Année de publication : 2022 Article en page(s) : p. 355-367 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Anthraquinone Caractérisation Cheveux -- Teinture Colorants -- Solubilité Colorants végétaux Extraction (chimie) Extraits de plantes Flavonoïdes Ingrédients cosmétiques Plantes tinctoriales Stabilité chimique Teck et constituants Index. décimale : 668.5 Parfums et cosmétiques Résumé : There is now a preference for hair dye products containing natural dyes because they are safer for human use. Teak leaves contain flavonoids, anthraquinones and naphthoquinones, and their extracts can be used as natural dyes. The objective of this research was to evaluate the use of teak leaf extracts as natural hair dyes. This research was carried out on both young and mature teak leaves that were extracted either with water or with ethanol-water mixtures using the decoction method. The colour substances in the extracts were studied by quantifying the flavonoid and anthraquinone content, and identified using liquid chromatography-mass spectrometry (LC-MS); the colour values were measured with the CIELab system. The solubility, stability and hair dyeing efficacy of the extracts were assessed. The results showed that young leaf extract is redder with a higher total flavonoid content than mature leaf extract. Fifty percent ethanol was the best solvent for extracting the high flavonoids from teak leaves. Polysorbate 20 significantly increased the water solubility of both young and mature leaf extracts. Hair dyed with young leaf extract became reddish brown, while hair dyed with mature leaf extract became brown. Stability testing found some flavonoid degradation of the extracts, but only slight colour changes occurred in the extracts. The LC-MS profiles showed high-intensity flavonoid peaks that could be applied to control the colour quality of the extracts with other parameters. These results demonstrate that teak leaf extracts are effective natural hair dyes that can be used in the development of hair dye products. Note de contenu : - EXPERIMENTAL : Materials - Plant extraction - Characterisation of teak leaf extracts - Dyeing ability of teak leaf extracts - RESULTS AND DISCUSSION : Effect of leaf maturity and extraction solvent on the quantitative colour substances of teak leaf extracts - Identified colour substances of teak leaf extracts - Solubility of teak leaf extracts - Stability of teak leaf extracts - Dyeing ability of teak leaf extracts - Table 1 : Effects of leaf maturity and extraction solvent on the colour substances associated with the colour properties of teak leaf extracts - Table 2 : Effect of type and concentration of solubiliser on the solubility in water of young and mature teak leaf extracts - Table 3 : Stability of young and mature teak leaf extracts - Table 4 : Colour of hair dyed with young and mature teak leaf the extracts at a concentration of 75 g/L and dyeing time of 60 minutes DOI : https://doi.org/10.1111/cote.12594 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12594 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37887 [article]

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