Synergistic performance of lecithin and glycerol monostearate in oil/water emulsions
The effects of the combination of two low-molecular weight emulsifiers (lecithin and glycerol-monostearate (GMS)) on the stability, the dynamic interfacial properties and rheology of emulsions have been studied. Different lecithin/GMS ratios were tested in order to assess their impact in the formati...
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2017
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09277765_v151_n_p68_MoranValero http://hdl.handle.net/20.500.12110/paper_09277765_v151_n_p68_MoranValero |
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paper:paper_09277765_v151_n_p68_MoranValero2023-06-08T15:52:04Z Synergistic performance of lecithin and glycerol monostearate in oil/water emulsions Pilosof, Ana María Renata Emulsion Glycerolmonostearate Lecithin Oil-water interface Drops Emulsification Emulsions Glycerol Phase interfaces Stearic acid Viscosity Emulsions viscosity Glycerolmonostearate Interfacial activity Interfacial pressure Interfacial property Low molecular weight Oil water interfaces Oil-in-water emulsions Lecithin emulsifying agent emulsion glycerol monoacylglycerol oil phosphatidylcholine polyglycerol monostearate surfactant water adsorption chemistry drug stability elasticity emulsion flow kinetics particle size pressure surface property viscosity Adsorption Drug Stability Elasticity Emulsifying Agents Emulsions Glycerol Lecithins Monoglycerides Oils Particle Size Pressure Rheology Surface Properties Surface-Active Agents Viscosity Water The effects of the combination of two low-molecular weight emulsifiers (lecithin and glycerol-monostearate (GMS)) on the stability, the dynamic interfacial properties and rheology of emulsions have been studied. Different lecithin/GMS ratios were tested in order to assess their impact in the formation and stabilization of oil in water emulsions. The combination of the two surfactants showed a synergistic behaviour, mainly when combined at the same ratio. The dynamic film properties and ζ-potential showed that lecithin dominated the surface of oil droplets, providing stability to the emulsions against flocculation and coalescence, while allowing the formation of small oil droplets. At long times of adsorption, all of the mixtures showed similar interfacial activity. However, higher values of interfacial pressure at the initial times were reached when lecithin and GMS were at the same ratio. Interfacial viscoelasticity and viscosity of mixed films were also similar to that of lecithin alone. On the other hand, emulsions viscosity was dominated by GMS. The synergistic performance of lecithin-GMS blends as stabilizers of oil/water emulsions is attributed to their interaction both in the bulk and at the interface. © 2016 Elsevier B.V. Fil:Pilosof, A.M.R. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2017 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09277765_v151_n_p68_MoranValero http://hdl.handle.net/20.500.12110/paper_09277765_v151_n_p68_MoranValero |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Emulsion Glycerolmonostearate Lecithin Oil-water interface Drops Emulsification Emulsions Glycerol Phase interfaces Stearic acid Viscosity Emulsions viscosity Glycerolmonostearate Interfacial activity Interfacial pressure Interfacial property Low molecular weight Oil water interfaces Oil-in-water emulsions Lecithin emulsifying agent emulsion glycerol monoacylglycerol oil phosphatidylcholine polyglycerol monostearate surfactant water adsorption chemistry drug stability elasticity emulsion flow kinetics particle size pressure surface property viscosity Adsorption Drug Stability Elasticity Emulsifying Agents Emulsions Glycerol Lecithins Monoglycerides Oils Particle Size Pressure Rheology Surface Properties Surface-Active Agents Viscosity Water |
| spellingShingle |
Emulsion Glycerolmonostearate Lecithin Oil-water interface Drops Emulsification Emulsions Glycerol Phase interfaces Stearic acid Viscosity Emulsions viscosity Glycerolmonostearate Interfacial activity Interfacial pressure Interfacial property Low molecular weight Oil water interfaces Oil-in-water emulsions Lecithin emulsifying agent emulsion glycerol monoacylglycerol oil phosphatidylcholine polyglycerol monostearate surfactant water adsorption chemistry drug stability elasticity emulsion flow kinetics particle size pressure surface property viscosity Adsorption Drug Stability Elasticity Emulsifying Agents Emulsions Glycerol Lecithins Monoglycerides Oils Particle Size Pressure Rheology Surface Properties Surface-Active Agents Viscosity Water Pilosof, Ana María Renata Synergistic performance of lecithin and glycerol monostearate in oil/water emulsions |
| topic_facet |
Emulsion Glycerolmonostearate Lecithin Oil-water interface Drops Emulsification Emulsions Glycerol Phase interfaces Stearic acid Viscosity Emulsions viscosity Glycerolmonostearate Interfacial activity Interfacial pressure Interfacial property Low molecular weight Oil water interfaces Oil-in-water emulsions Lecithin emulsifying agent emulsion glycerol monoacylglycerol oil phosphatidylcholine polyglycerol monostearate surfactant water adsorption chemistry drug stability elasticity emulsion flow kinetics particle size pressure surface property viscosity Adsorption Drug Stability Elasticity Emulsifying Agents Emulsions Glycerol Lecithins Monoglycerides Oils Particle Size Pressure Rheology Surface Properties Surface-Active Agents Viscosity Water |
| description |
The effects of the combination of two low-molecular weight emulsifiers (lecithin and glycerol-monostearate (GMS)) on the stability, the dynamic interfacial properties and rheology of emulsions have been studied. Different lecithin/GMS ratios were tested in order to assess their impact in the formation and stabilization of oil in water emulsions. The combination of the two surfactants showed a synergistic behaviour, mainly when combined at the same ratio. The dynamic film properties and ζ-potential showed that lecithin dominated the surface of oil droplets, providing stability to the emulsions against flocculation and coalescence, while allowing the formation of small oil droplets. At long times of adsorption, all of the mixtures showed similar interfacial activity. However, higher values of interfacial pressure at the initial times were reached when lecithin and GMS were at the same ratio. Interfacial viscoelasticity and viscosity of mixed films were also similar to that of lecithin alone. On the other hand, emulsions viscosity was dominated by GMS. The synergistic performance of lecithin-GMS blends as stabilizers of oil/water emulsions is attributed to their interaction both in the bulk and at the interface. © 2016 Elsevier B.V. |
| author |
Pilosof, Ana María Renata |
| author_facet |
Pilosof, Ana María Renata |
| author_sort |
Pilosof, Ana María Renata |
| title |
Synergistic performance of lecithin and glycerol monostearate in oil/water emulsions |
| title_short |
Synergistic performance of lecithin and glycerol monostearate in oil/water emulsions |
| title_full |
Synergistic performance of lecithin and glycerol monostearate in oil/water emulsions |
| title_fullStr |
Synergistic performance of lecithin and glycerol monostearate in oil/water emulsions |
| title_full_unstemmed |
Synergistic performance of lecithin and glycerol monostearate in oil/water emulsions |
| title_sort |
synergistic performance of lecithin and glycerol monostearate in oil/water emulsions |
| publishDate |
2017 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09277765_v151_n_p68_MoranValero http://hdl.handle.net/20.500.12110/paper_09277765_v151_n_p68_MoranValero |
| work_keys_str_mv |
AT pilosofanamariarenata synergisticperformanceoflecithinandglycerolmonostearateinoilwateremulsions |
| _version_ |
1768546167125180416 |