Rheology of emulsions

Derkach, Svetlana R.

doi:10.1016/j.cis.2009.07.001

Cited by 418 publications

(264 citation statements)

References 154 publications

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“…The rheology of emulsions has been discussed by Derkach [27] and Barnes [28]. The viscosities of emulsions depend strongly on the volume fraction of the dispersed phase, the viscosity ratio of the two phases and the Capillary number, Ca which is the ratio of the driving force for deformation (the shear stress) to the interfacial resistance.…”

Section: Emulsions Inspection Of the T-t G Values Inmentioning

confidence: 99%

Low shear rheological behaviour of two-phase mesophase pitch

Ramjee

Rand

Focke

2015

Carbon

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Section: Emulsions Inspection Of the T-t G Values Inmentioning

confidence: 99%

Low shear rheological behaviour of two-phase mesophase pitch

Ramjee

Rand

Focke

2015

Carbon

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“…The rheological properties of microemulsions are often crucial in their application because they will affect the processability, and kinetics, and stability under various conditions [19]. Microemulsions show varying rheology depending on the phase point.…”

Section: Rheologymentioning

confidence: 99%

Introductory Chapter: Microemulsions

Karunaratne¹,

Pamunuwa²,

Ranatunga³

2017

Properties and Uses of Microemulsions

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Section: Emulsifying Properties Of Sepiplus 400 and Emulsions On Its mentioning

confidence: 99%

“…Colloidal particles of the micelles accumulate at the oil-water interface, form mechanically firm structured films and thus stabilize the emulsion. The composition and the structure of such films are diverse and depend on the chemical structure of a stabilizer-emulsifier [6,7].One of the new promising emulsifiers for production of medicinal and cosmetic emulsions is the substance with a commercial name of Sepiplus 400 (Sepiplus™ 400, Seppic, France) and international unlicensed name of Polyacrylate -Polyisobutene -Polysorbate-20 (INCI).Sepiplus 400 is a liquid polyanionic surface-active agent, which does not require any preliminary operations for its preparation: heating, neutralization, dispersion, etc. This is a ready-made emulsifying mixture, which is an invert emulsion where polymer chains are tightly convoluted in the internal aqueous phase.…”

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confidence: 99%

The study of the properties of emulsions based on Sepiplus 400

Kovalyova

Polovko

2015

Vìsn. farm.

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Emulsifying properties of Sepiplus 400 and emulsions on its basis obtained by the method of cold emulsification have been studied. It has been found that the given emulsifier being in the concentration of 1-5% without adding co-emulsifiers and structure-forming agents allows to obtain stable emulsions within the range of the oil phase concentrations of physicochemical, technological, structural Currently polyanionic surface-active agents are widely used in manufacture of medicinal and cosmetic products. They are especially interesting as effective emulsion stabilizers [4,9,10].One of the methods of emulsion stabilization is the use of micelles of block copolymers colloidally dispersed in oil and having high emulsifying properties. Colloidal particles of the micelles accumulate at the oil-water interface, form mechanically firm structured films and thus stabilize the emulsion. The composition and the structure of such films are diverse and depend on the chemical structure of a stabilizer-emulsifier [6,7].One of the new promising emulsifiers for production of medicinal and cosmetic emulsions is the substance with a commercial name of Sepiplus 400 (Sepiplus™ 400, Seppic, France) and international unlicensed name of Polyacrylate -Polyisobutene -Polysorbate-20 (INCI).Sepiplus 400 is a liquid polyanionic surface-active agent, which does not require any preliminary operations for its preparation: heating, neutralization, dispersion, etc. This is a ready-made emulsifying mixture, which is an invert emulsion where polymer chains are tightly convoluted in the internal aqueous phase. The mechanism of the emulsifying action of Sepiplus 400 is explained by the theory of "unwrapping drops". The essence of this phenomenon consists in the phase inversion during which the polymer chains of Sepiplus 400 are unwrapping into the external aqueous phase, generating a stabilizing gel structure [5,8].The aim of our work was to study the emulsifying properties of Sepiplus 400, prepare the experimental samples of emulsions on its basis and study the organoleptic, structural and mechanical, as well as technological properties of the emulsions obtained. Materials and MethodsThe sets of experimental samples with different consistency were prepared by the method of cold emulsification with mineral and vegetable (corn) oil, their concentration varied between 5 and 50%. Sepiplus 400 was introduced as a monoemulsifier within the range of concentrations of 0.5-5% recommended by the manufacturer [2,11]. The finished emulsions were tested by the following characteristics: appearance, colloidal and thermal stability, pH value, type of emulsion, some rheological properties, sensory characteristics (the rate of absorption, subjective sensations, stickiness, the absence of white traces when applying).Colloidal and thermal stability were determined in accordance with the methodology of GOST "Cosmetic creams" [3]. The pH values of the experimental samples were determined potentiometrically in 10% water extraction of the cream with the help of a pH 15...

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Rheology of emulsions

Cited by 418 publications

References 154 publications

Low shear rheological behaviour of two-phase mesophase pitch

Low shear rheological behaviour of two-phase mesophase pitch

Introductory Chapter: Microemulsions

The study of the properties of emulsions based on Sepiplus 400

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