Accueil
Détail de l'auteur
Auteur Emilie Munnier |
Documents disponibles écrits par cet auteur
Ajouter le résultat dans votre panier Affiner la recherche
Efficiency of emulsifier-free emulsions in delivering caffeine and a-tocopherol to human skin / Hichem Kichou in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 45, N° 3 (06/2023)
[article]
Titre : Efficiency of emulsifier-free emulsions in delivering caffeine and a-tocopherol to human skin Type de document : document électronique Auteurs : Hichem Kichou, Auteur ; Amanda C. Caritá, Auteur ; Guillaume Gillet, Auteur ; Lahcen Bougassaa, Auteur ; Xavier Perse, Auteur ; Martin Soucé, Auteur ; Laurianne Gressin, Auteur ; Igor Chourpa, Auteur ; Franck Bonnier, Auteur ; Emilie Munnier, Auteur Année de publication : 2023 Article en page(s) : p. 329-344 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Caféine
Cosmétiques
Emulsions -- Stabilité
Emulsions sans émulsifiants
Formulation (Génie chimique)
Peau
Peau -- Soins et hygiène
Perméation
pH -- Mesure
Rhéologie
Taille des gouttelettes
Ultrasons
ViscositéIndex. décimale : 668.5 Parfums et cosmétiques Résumé : - Objective : Increasing consumer demand for natural and environmentally friendly products is driving the cosmetic industry to seek greener and safer processes. High-frequency ultrasound technology (HFUT) stabilizes emulsions without adding emulsifying surfactants (ES). In this work, the formulation characteristics of an HFUT-treated emulsion and a Reference emulsion were compared for both caffeine and α-tocopherol.
- Methods : A comparison was made between ES-free emulsions and the Reference emulsions based on droplet size, viscosity, pH and rheology behaviour for both active cosmetic ingredients. The permeation of caffeine and the skin retention of α -tocopherol were studied in vitro using Franz diffusion cells on human skin biopsies, considered the gold standard for permeation assays.
- Results : The formulations developed were stable and showed suitable droplet size distribution. In the case of ES-free emulsions, the average droplet size was inferior to 1.5 μm regardless of the polarity of the active. All formulations presented a shear-thinning pseudoplastic behaviour, an attribute usually desired for cosmetic products. The skin permeation studies showed that in the case of caffeine (model hydrophilic molecule), the ES-free emulsion presented a delivery capacity similar to that of the Reference emulsion. However, for α-tocopherol (highly lipophilic model molecule), differences were observed in the distribution of the active in the stratum corneum with an advantage for the Reference emulsion, probably due to the impact of surfactants on the SC lipids.
- Conclusion : This work demonstrates that HFUT is a reliable tool that is able to prepare stable ES-free emulsions loaded with hydrophilic or lipophilic active ingredients. Skin permeation studies confirm that the emulsions produced by HFUT promote the delivery of the actives to the human skin. In the case of α-tocopherol, the delivery efficiency was lower than with the Reference emulsion, especially in the SC layers, due to the absence of surfactants. Nevertheless, the ES-free emulsion still represents a good compromise between efficacy and the need for green cosmetics in the market.Note de contenu : - MATERIALS AND METHODS : Chemicals - ES-free emulsion preparation by HFUT - Reference emulsion preparation with ES - Droplets size measurement - Viscosity and pH measurement - Rheology measurements - Human skin biopsies - Human skin permeation experiments - Caffeine permeation experiment -
α-Tocopherol penetration experiment - HPLC analysis - Data analysis
- RESULTS AND DISCUSSION : Rheological behaviour - Emulsion stability - Caffeine permeation - α-Tocopherol SC penetration
- Table 1 : Composition (wt %) of tested ES-free emulsions
- Table 2 : Average particle size, D10, D50 and D90 for the caffeine and α-tocopherol ES-free emulsions
- Table 3 : Values of viscosity (in Pa.s) collected at different shear rates (in s−1) from the shear flow test for the four studied emulsions
- Table 4 : Viscosity, pH and average size of the droplets after 3 days (D3) and one month of storage for the caffeine and α-tocopherol ES-free emulsions and Reference emulsions
- Table 5 : Steady-state fluxes (Jss), lag times (tlag) and permeability coefficients (kp) obtained from cumulative amount profiles of caffeine from ES-free and Reference emulsion through human skin samples from three donorsDOI : https://doi.org/10.1111/ics.12837 En ligne : https://drive.google.com/file/d/1WalVHhYdSvayc4H8aer26tc2DlSBwEIK/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39564
in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE > Vol. 45, N° 3 (06/2023) . - p. 329-344[article]Exemplaires
Code-barres Cote Support Localisation Section Disponibilité aucun exemplaire Highlighting the efficiency of ultrasound-based emulsifier-free emulsions to penetrate reconstructed human skin / Hichem Kichou in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 44, N° 2 (04/2022)
[article]
Titre : Highlighting the efficiency of ultrasound-based emulsifier-free emulsions to penetrate reconstructed human skin Type de document : document électronique Auteurs : Hichem Kichou, Auteur ; Yuri Dancik, Auteur ; Christophe Eklouh-Molinier, Auteur ; Nicolas Huang, Auteur ; Martin Soucé, Auteur ; Laurianne Gressin, Auteur ; Guillaume Gillet, Auteur ; Igor Chourpa, Auteur ; Emilie Munnier, Auteur ; Franck Bonnier, Auteur Année de publication : 2022 Article en page(s) : p. 262-270 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Emulsions -- Emploi en cosmétologie
Emulsions -- Stabilité
Emulsions sans émulsifiants
Epiderme
Formulation (Génie chimique)
Peau reconstruite
Pénétration cutanée
UltrasonsIndex. décimale : 668.5 Parfums et cosmétiques Résumé : - Objective : The cosmetic industry endeavours to strengthen the greener and safer claims of processes to respond to the high demand from customers for natural and environmentally friendly products. High-frequency ultrasonication technology (HFUT) is a physical process enabling the stabilization of emulsions without requiring additional ingredients, such as emulsifying surfactants (ES) to be introduced into the formulations. In this study, key formulation characteristics of an emulsion synthesized by HFUT and a reference emulsion (RE) were compared, as well as the permeation kinetics of caffeine, used as a model active cosmetic ingredient, from both types of emulsions.
- Methods : The pH, droplet size and viscosity of emulsions prepared by the HFUT and the RE were determined and compared. The permeation of caffeine from the HFUT emulsion and the RE applied to the surface of reconstructed human epidermis (RHE) models was compared.
- Results : The ES-free formulations prepared by HFUT displayed a nearly 2-fold lower average droplet size and over 3-fold greater viscosity, compared to the RE. Despite these differences, the absence of ES in the HFUT emulsion did not significantly alter the permeation kinetics of caffeine through RHE. The caffeine steady-state flux, lag time and permeability coefficients differed by 20%–30% only.
- Conclusion : This study demonstrates the potential of the HFUT to yield topical cosmetic products with lower requirements ingredients-wise, without losing efficacy, supporting the possible implementation of the technology in the cosmetic industry.Note de contenu : - MATERIALS AND METHODS : Ingredients - Preparation of samples - Viscosity and pH measurement - Particle size measurement - Reconstructed human epidermis (RHE) - Skin permeation experiments - High-performance liquid chromatography (HPLC) analysis - Data analysis
- RESULTS AND DISCUSSION : Characterization of samples - In vitro caffeine permeation
- Table 1 : Composition (wt %) of the caffeine formulations studied
- Table 2 : Viscosity, pH, average particle size, D10, D50 and D90 for the ES-free emulsion and the reference emulsion
- Table 3 : Steady-state fluxes (Jss), lag times (tlag) and permeability coefficients (kp) obtained from cumulative amount profiles of caffeine through EpiSkin® RHE samplesDOI : https://doi.org/10.1111/ics.12772 En ligne : https://drive.google.com/file/d/1lFjiRKOEITkgH-9evR1GnTdiR9H6BvRV/view?usp=shari [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37727
in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE > Vol. 44, N° 2 (04/2022) . - p. 262-270[article]Exemplaires
Code-barres Cote Support Localisation Section Disponibilité aucun exemplaire Homogeneous distribution of fatty ester-based active cosmetic ingredients in hydrophilic thin films by means of nanodispersion / Emilie Munnier in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 42, N° 5 (10/2021)
[article]
Titre : Homogeneous distribution of fatty ester-based active cosmetic ingredients in hydrophilic thin films by means of nanodispersion Type de document : document électronique Auteurs : Emilie Munnier, Auteur ; Almar Al Assaad, Auteur ; Stephanie David, Auteur ; Frédéric Mahut, Auteur ; Marylène Vayer, Auteur ; Louise Van Gheluwe, Auteur ; Florent Yvergnaux, Auteur Année de publication : 2020 Article en page(s) : p. 512-519 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Alcool polyvinylique
Couches minces
Dispersions et suspensions
Formulation (génie chimique) -- Stabilité
Ingrédients cosmétiques
Nanotechnologie
Patchs cosmétiques
Pénétration (physique)
Systèmes de livraison (pharmacie)
VectorisationIndex. décimale : 668.5 Parfums et cosmétiques Résumé : - Objective : Cosmetic films and patches are interesting forms to promote skin penetration of active ingredients as they ensure their long stay on the treated zone of the skin. Nevertheless, currently developed films and patches are most of all hydrophilic and are not adapted to the hydrophobic molecules. The aim of this study was to establish whether nanodispersion of fatty acid-based active cosmetic ingredients (ACI) could be a manner to introduce high concentrations of those ACI in hydrophilic films.
- Methods : Punica granatum seed oil hydroxyphenethyl esters (PHE) constitute a commercialized lipolytic cosmetic ingredient obtained by enzymatic conjugation of tyrosol to long-chain fatty acids and to enhance its skin diffusion. Nanodispersions of PHE were prepared by a green emulsion-solvent evaporation process and dispersed in polyvinyl alcohol films. Raman imaging coupled to multivariate analysis was used to study the distribution of PHE in the films.
- Results : Nanodispersions of PHE combined with antioxidant vitamin E and stabilized by Pluronic® F127 were successfully prepared. The nanodispersions show a spherical shape and a hydrodynamic diameter close to 100 nm. Raman images analysis with multivariate approaches showed a very homogeneous distribution of PHE nanodispersions in the films compared to free PHE introduced as an ethanol solution.
- Conclusion : Nanodispersions of hydrophobic fatty acid-based ingredients seem to be relevant method to introduce this type of ingredient in hydrophilic film matrix. The co-suspension with vitamin E limits their degradation in time.Note de contenu : - MATERIALS AND METHODS : Chemicals - Preparation of NanoPHE - Characterization of NanoPHE - Preparation and characterization of PHE-loaded PVA films - Raman imaging
- RESULTS AND DISCUSSION : Preparation of nanodispersion of Punica granatum seed oil hydroxyphenethyl esters - Dispersion of PHE in polyvinyl alcohol films
- Table : Physicochemical characteristics of NanoPHE, initially or after 3 months of shelf life at room temperatureDOI : https://doi.org/10.1111/ics.12652 En ligne : https://drive.google.com/file/d/1k0Z6a3kYNsXkJubOl3IrA6v3tOQoUyIp/view?usp=shari [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35416
in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE > Vol. 42, N° 5 (10/2021) . - p. 512-519[article]Exemplaires
Code-barres Cote Support Localisation Section Disponibilité aucun exemplaire Lipid-based submicron capsules as a strategy to include high concentrations of a hydrophobic lightening agent in a hydrogel / H. T. P. Nguyen in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 39, N° 4 (08/2017)
[article]
Titre : Lipid-based submicron capsules as a strategy to include high concentrations of a hydrophobic lightening agent in a hydrogel Type de document : texte imprimé Auteurs : H. T. P. Nguyen, Auteur ; M. Soucé, Auteur ; X. Perse, Auteur ; F. Vial, Auteur ; T. Perrier, Auteur ; Florent Yvergnaux, Auteur ; I. Chourpa, Auteur ; Emilie Munnier, Auteur Année de publication : 2017 Article en page(s) : p. 450-456 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Agents de blanchiment
Analyse spectrale
Chimie analytique
Encapsulation
Formulation (Génie chimique)
Membranes lipidiques
NanocapsulesIndex. décimale : 668.5 Parfums et cosmétiques Résumé : - OBJECTIF : La présente étude vise à augmenter la concentration d'un agent éclaircissant hydrophobe, Omegalight®, dans un produit cosmétique hydrophile par encapsulation dans des capsules submicroniques à base de lipides. Le noyau de ces capsules est entièrement constitué de l'agent éclaircisseur commercial.
- METHODES : Les systèmes de nanocapsules lipidiques (LNC) ont été préparés par la méthode PIT. Leurs propriétés physico-chimiques ont été suivies pendant 6 mois par diffusion dynamique de la lumière et mesures du potentiel zêta, et en parallèle, la dégradation potentielle de l'ingrédient actif a été surveillée par HPLC. La stabilité des capsules dans un gel cosmétique a été étudiée par spectrofluorimétrie et mesures de rhéologie. L'analyse sensorielle a été utilisée pour déterminer l'influence de la présence de capsules dans le gel pour le consommateur.
- RESULTATS : Les nanocaspules lipidiques Omegalight® ont été préparées à l’échelle d'essai laboratoire, puis sur une échelle semi-pilote. Leurs diamètres hydrodynamiques sont d'environ 230 nm. La concentration d'Omegalight® dans les capsules atteint environ 84% p / p, ce qui correspond à 42% d'ingrédient actif. Les LNC peuvent être dispersés sans dégradation à des concentrations allant jusqu’à 20% p / p dans un hydrogel sans modification des propriétés physico-chimiques ou sensorielles du gel.
- CONCLUSION : Les nanocapsules lipidiques (LNC), un système d'encapsulation utile pour la libération épidermique de composés hydrophobes, ont été adaptés à l'encapsulation d'un agent éclaircissant commercial. L'encapsulation permet la dispersion de manière stable d'une concentration très élevée d'une molécule active hydrophobe dans un hydrogel tout en maintenant les propriétés physico-chimiques et sensorielles du gel.Note de contenu : - MATERIALS AND METHODS : Chemicals - Preparation of OL-loaded lipid-based capsules - Characterization of LNC-OL suspensions - Preparation and characterization of LNC-OL-loaded hydrogels
- RESULTS AND DISCUSSON : LNC-OL preparation - Stability of SP-LNC-OL over 6 months - LNC-OL inclusion in a model cosmetic productDOI : 10.1111/ics.12397 Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28864
in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE > Vol. 39, N° 4 (08/2017) . - p. 450-456[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 19159 - Périodique Bibliothèque principale Documentaires Disponible