Impact of polyelectrolyte-surfactant interactions on the rheology and wet lubrication performance of conditioning shampoo / Adeline Maria Benhur in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 43, N° 2 (04/2021)  

[article]  inINTERNATIONAL JOURNAL OF COSMETIC SCIENCE > Vol. 43, N° 2 (04/2021) . - p. 246-253 Titre : Impact of polyelectrolyte-surfactant interactions on the rheology and wet lubrication performance of conditioning shampoo Type de document : document électronique Auteurs : Adeline Maria Benhur, Auteur ; Jangelis Diaz, Auteur ; Samiul Amin, Auteur Année de publication : 2021 Article en page(s) : p. 246-253 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cheveux -- Soins et hygiène Cosmétiques Lubrification Polyélectrolytes Rhéomètres shampooings Surfactants Viscoélasticité Viscosité Index. décimale : 668.5 Parfums et cosmétiques Résumé : - Objective : The purpose of this study is to understand the impact of the cationic polymer merquat on the rheological behavior of the mixed surfactant system of sodium lauryl ether sulfate (SLES) and cocamidopropyl betaine (CapB) as well as the impact of varying formulation conditions on the wet lubrication performance of the SLES-CapB-Merquat system. - Methods : Rotation mechanical Rheometry was used to study the rheological response of the SLES-CapB-Merquat systems. Frequency sweeps were conducted to analyze the rheological properties of the system at low frequency ranges and bulk viscosity of the system was studied at high shear rates at varying salt and polymer concentrations. Wet combing tests and hair friction tests were run on the Dia-stron MTT175 flexible miniature tensile tester in order to evaluate the conditioning effects of the different formulations. - Results : The SLES-CapB system on its own exhibits very little viscosity. The bulk rheology results show that the addition of Merquat enhances the viscosity and viscoelastic properties of the SLES-CapB-Merquat system indicating the presence of electrostatic interactions between the surfactant and polyelectrolyte. Addition of salt had a significant impact on the system’s rheological response due to the charge screening effect of salt. Wet combing force data indicate that the charged polyelectrolyte binds to the hair substrate resulting in reduced combing force values after the product was applied. The addition of silicone oil to the formulation seemed to greatly enhance the conditioning effect of the formulation. - Conclusion : The charge interactions between SLES, CapB and Merquat results in the formation of an integrated gel like network, thus building the viscosity of the system. Variation of parameters like polymer and salt concentration has the potential to modify the bulk rheological properties and consequently the wet lubrication properties of the system. Note de contenu : - MATERIALS AND METHODS : Effect of polymer concentration - Effect of salt - Wet lubrication performance - Technique - RESULTS AND DISCUSSION : Rheological properties - Table 1 & 2 : Percentage reduction in wet combing force for the different formulations with varying polymer and silicone oil concentrations - Table 3 : Percentage reduction in coefficient of friction values for the different formulations with varying polymer, salt and silicone oil concentrations DOI : https://doi.org/10.1111/ics.12689 En ligne : https://drive.google.com/file/d/1KhJn1czcTPMjtiTFkzLWBGzanEmExWSk/view?usp=shari [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35876 [article]

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