Accueil
Résultat de la recherche
3 résultat(s) recherche sur le tag 'Emulsification'
Ajouter le résultat dans votre panier Affiner la recherche Générer le flux rss de la recherche
Partager le résultat de cette recherche
Formation of lipid emulsions and clear gels by liquid crystal emulsification / Toshiyuki Suzuki in IFSCC MAGAZINE, Vol. 9, N° 3 (07-08-09/2006)
[article]
Titre : Formation of lipid emulsions and clear gels by liquid crystal emulsification Type de document : texte imprimé Auteurs : Toshiyuki Suzuki, Auteur ; Hidetaka Iwai, Auteur Année de publication : 2006 Article en page(s) : p. 183-194 Note générale : Bibliogr. Langues : Anglais (eng) Tags : Emulsion 'Cristal liquide' 'Gel lipide' Céramide Emulsification 'Structure lamellaire' Index. décimale : 668.5 Parfums et cosmétiques Résumé : Recently developed emulsion technologies for the formation of fine emulsions, lipid emulsions and clear gels by liquid crystal emulsification were reviewed. As a basic information on liquid crystal emulsification, the structures and characteristic behaviours of lyotropic liquid crystals were summarized. Formation of a liquid crystalline phase was often seen in emulsions and biological systems. The significance of liquid crystal formation during emulsification was analysed by comparing the states and stabilities of emulsions prepared by different processes. Then uses of liquid crystals for formation of the characteristic emulsions and gels were also discussed. In liquid crystal emulsification, an oil phase is dispersed directly into the lamellar liquid-crystalline phase composed of surfactant, glycerol and water to prepare a gel-like oil-in-liquid crystal emulsion. This is followed by dilution with the remaining water to produce an emulsion. From the phase behaviour during emulsification and analysis of the local motion of the liquid crystal membrane by fluorometry, it was confirmed that the interaction between surfactant and a polyol molecule such as glycerol promotes hydrogen bonding and enhances the strength of the lamellar liquid crystal membranes, which results in the formation of oil-in-liquid crystal emulsions. The interaction between the liquid crystal and oil was analysed from the changes in molecular motion of the membrane at the oil-liquid crystal interface using the spin label technique of electron spin resonance (ESR). The fluidity of the liquid crystal membrane did not change when oil was added, and therefore oil-in-liquid crystal emulsions of various oils were prepared by the identical process. This lack of dependence of the liquid crystal membrane on oil results in the unique properties of liquid crystal emulsification, which can be used for oils of various polarity and different molecular constituents. When a self-organizing artificial stratum corneum lipid containing pseudo-ceramide was used as a principal component of the oil, a multilamellar emulsion of concentric lamellar structure was formed. The multilamellar emulsion supplements the physiological function of stratum corneum by the identical mechanism as natural intercellular lipids. High-pressure treatment of the lipid emulsion produced a gel-like emulsion crystal, in which the homogeneous nanoemulsion droplets were arranged in a hexagonal array. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=10442
in IFSCC MAGAZINE > Vol. 9, N° 3 (07-08-09/2006) . - p. 183-194[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 008186 - Périodique Bibliothèque principale Documentaires Disponible Polymeric surfactants and their application in polymerisation and in coatings / A. Bouvy in PAINTINDIA, Vol. XLVI, N° 8 (08/1996)
[article]
Titre : Polymeric surfactants and their application in polymerisation and in coatings Type de document : texte imprimé Auteurs : A. Bouvy, Auteur Année de publication : 1996 Article en page(s) : p. 29-34 Note générale : Bibliogr. Langues : Anglais (eng) Tags : Peinture Adjuvant 'Agent surface' Polymère 'Alkyde résine' Emulsification Dispersant 'Effet stérique' Polymérisation 'Article synthèse' Index. décimale : 667.9 Revêtements et enduits Résumé : In recent years, there has been considerable interest in polymeric surfactants. EO/PO copolymers can be considered to be polymeric surfactants. Polyacrylic acid of low specular weight (<15.000), condensates of naphtalene sulphonate with formaldehyde and sulfonated styrene/maleic anhydride copolymers are often also included in descriptions of polymerics surfactants. The word polymeric suggests high molecular weight but there is no real justification for calling these materials as such. Although the term olipgomeric would be more appropriate, the word polymeric has now been firmly established. Note de contenu : STRUCTURE OF POLYMERIC SURFACTANTS
- APPLICATION OF POLYMERIC SURFACTANTS IN COATINGS : Emulsification of air-drying alkyd resins - Pigment dispersion
- APPLICATION OF POLYMERIC SURFACTANTS IN POLYMERISATIONPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=13508
in PAINTINDIA > Vol. XLVI, N° 8 (08/1996) . - p. 29-34[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 006506 - Périodique Bibliothèque principale Documentaires Disponible Polymeric surfactants and their use in industrial applications / A. Bouvy in PAINTINDIA, Vol. XLVIII, N° 3 (03/1998)
[article]
Titre : Polymeric surfactants and their use in industrial applications Type de document : texte imprimé Auteurs : A. Bouvy, Auteur ; P. Leversidge, Auteur Année de publication : 1998 Article en page(s) : p. 45-52 Note générale : Bibliogr. Langues : Anglais (eng) Tags : Peinture Adjuvant ‘Agent surface’ Polymère ‘Alkyde résine’ Emulsification Pigment Dispersion Index. décimale : 667.9 Revêtements et enduits Note de contenu : - Polymeric surfactants : structure/performance relationship
- Typical applications of polymeric surfactants
- Emulsification of air-drying alkyd resins
- Pigment dispersion
- Copolymerisation of acrylic monomers
- ‘Meta-stable’ (O/W) emulsion for cold rolling of steel
- Concentrated emulsions
Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=13124
in PAINTINDIA > Vol. XLVIII, N° 3 (03/1998) . - p. 45-52[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 006475 - Périodique Bibliothèque principale Documentaires Disponible