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Crystal morphology of hydrogenated castor oil in the crystallization of oil - in - water emulsions / Dingzheng Yang in Industrial & engineering chemistry research, Vol. 50 N° 20 (Octobre 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 20 (Octobre 2011) . - pp. 11594-11600 Titre : Crystal morphology of hydrogenated castor oil in the crystallization of oil - in - water emulsions : part II. effect of shear Type de document : texte imprimé Auteurs : Dingzheng Yang, Auteur ; Andrew N. Hrymak, Auteur ; Musa R. Kamal, Auteur Année de publication : 2011 Article en page(s) : pp. 11594-11600 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Shear  Emulsion  Crystallization  Crystal  morphology Résumé : Crystallization of hydrogenated castor oil-in-water emulsions has been studied by polarized light microscopy under controlled shear. Shear rates from 0 to 100 s-1 have been applied at cooling rates from 1 to 5 °C/min. Emulsions have been redispersed by shear before crystals formed. The higher the shear rate, the smaller the droplet size. Nucleation has been promoted with the increase of shear rate. Morphology analysis indicates that crystals in the form of fibers favor gentle shear, i.e., 1 s-1, but fibers can be broken up with the increase of shear time. Crystals as rosettes tend to become elongated in the flow direction. At lower cooling rate (<2 °C/min), mean crystal size decreases with shear rate. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24612383 [article] Crystal morphology of hydrogenated castor oil in the crystallization of oil - in - water emulsions : part II. effect of shear [texte imprimé] / Dingzheng Yang, Auteur ; Andrew N. Hrymak, Auteur ; Musa R. Kamal, Auteur . - 2011 . - pp. 11594-11600. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 20 (Octobre 2011) . - pp. 11594-11600 Mots-clés : Shear  Emulsion  Crystallization  Crystal  morphology Résumé : Crystallization of hydrogenated castor oil-in-water emulsions has been studied by polarized light microscopy under controlled shear. Shear rates from 0 to 100 s-1 have been applied at cooling rates from 1 to 5 °C/min. Emulsions have been redispersed by shear before crystals formed. The higher the shear rate, the smaller the droplet size. Nucleation has been promoted with the increase of shear rate. Morphology analysis indicates that crystals in the form of fibers favor gentle shear, i.e., 1 s-1, but fibers can be broken up with the increase of shear time. Crystals as rosettes tend to become elongated in the flow direction. At lower cooling rate (<2 °C/min), mean crystal size decreases with shear rate. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24612383