Hydroxypropylmethylcellulose at the oil-water interface. Part II. Submicron-emulsions as affected by pH

The emulsifying behavior of four different commercial types of hydroxypropylmethylcellulose (HPMC) was studied and correlated with the properties of the interfacial films. Emulsions resulted multimodal when made by a high speed blender (Ultraturrax, UT), with droplets higher than 10 μm. The average...

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Autores principales: Camino, N.A., Pilosof, A.M.R.
Formato: JOUR
Materias:
Emulsions
High intensity ultrasound
Hydroxypropylmethylcellulose
Interface
Stability
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_0268005X_v25_n5_p1051_Camino
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling todo:paper_0268005X_v25_n5_p1051_Camino2023-10-03T15:13:40Z Hydroxypropylmethylcellulose at the oil-water interface. Part II. Submicron-emulsions as affected by pH Camino, N.A. Pilosof, A.M.R. Emulsions High intensity ultrasound Hydroxypropylmethylcellulose Interface Stability The emulsifying behavior of four different commercial types of hydroxypropylmethylcellulose (HPMC) was studied and correlated with the properties of the interfacial films. Emulsions resulted multimodal when made by a high speed blender (Ultraturrax, UT), with droplets higher than 10 μm. The average diameters D32 resulted higher for UT emulsions stabilized by the higher molecular weight HPMC (E4M and E50LV). However, E4M emulsions presented the highest variation in D32 with pH. Emulsions made by high intensity ultrasound, presented a monomodal population with the majority of the droplets around 0.3 μm. In all cases, the droplets sizes were smaller than 0.5 μm. As for UT emulsions, higher average diameters (D32 and D43) were obtained for all HPMCs at pH3.Emulsions at pH3 destabilized quicker than emulsions at pH6, mainly when made by Ultraturrax. At pH3 hydrophobic interactions are impeded thus elastic films are not formed upon emulsification, resulting in droplets with higher initial diameters than at pH6. © 2010 Elsevier Ltd. Fil:Camino, N.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Pilosof, A.M.R. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_0268005X_v25_n5_p1051_Camino
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Emulsions
High intensity ultrasound
Hydroxypropylmethylcellulose
Interface
Stability
spellingShingle Emulsions
High intensity ultrasound
Hydroxypropylmethylcellulose
Interface
Stability
Camino, N.A.
Pilosof, A.M.R.
Hydroxypropylmethylcellulose at the oil-water interface. Part II. Submicron-emulsions as affected by pH
topic_facet Emulsions
High intensity ultrasound
Hydroxypropylmethylcellulose
Interface
Stability
description The emulsifying behavior of four different commercial types of hydroxypropylmethylcellulose (HPMC) was studied and correlated with the properties of the interfacial films. Emulsions resulted multimodal when made by a high speed blender (Ultraturrax, UT), with droplets higher than 10 μm. The average diameters D32 resulted higher for UT emulsions stabilized by the higher molecular weight HPMC (E4M and E50LV). However, E4M emulsions presented the highest variation in D32 with pH. Emulsions made by high intensity ultrasound, presented a monomodal population with the majority of the droplets around 0.3 μm. In all cases, the droplets sizes were smaller than 0.5 μm. As for UT emulsions, higher average diameters (D32 and D43) were obtained for all HPMCs at pH3.Emulsions at pH3 destabilized quicker than emulsions at pH6, mainly when made by Ultraturrax. At pH3 hydrophobic interactions are impeded thus elastic films are not formed upon emulsification, resulting in droplets with higher initial diameters than at pH6. © 2010 Elsevier Ltd.
format JOUR
author Camino, N.A.
Pilosof, A.M.R.
author_facet Camino, N.A.
Pilosof, A.M.R.
author_sort Camino, N.A.
title Hydroxypropylmethylcellulose at the oil-water interface. Part II. Submicron-emulsions as affected by pH
title_short Hydroxypropylmethylcellulose at the oil-water interface. Part II. Submicron-emulsions as affected by pH
title_full Hydroxypropylmethylcellulose at the oil-water interface. Part II. Submicron-emulsions as affected by pH
title_fullStr Hydroxypropylmethylcellulose at the oil-water interface. Part II. Submicron-emulsions as affected by pH
title_full_unstemmed Hydroxypropylmethylcellulose at the oil-water interface. Part II. Submicron-emulsions as affected by pH
title_sort hydroxypropylmethylcellulose at the oil-water interface. part ii. submicron-emulsions as affected by ph
url http://hdl.handle.net/20.500.12110/paper_0268005X_v25_n5_p1051_Camino
work_keys_str_mv AT caminona hydroxypropylmethylcelluloseattheoilwaterinterfacepartiisubmicronemulsionsasaffectedbyph
AT pilosofamr hydroxypropylmethylcelluloseattheoilwaterinterfacepartiisubmicronemulsionsasaffectedbyph
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