Materials based on solid-stabilized emulsions

Arditty, S.; Schmitt, Véronique; Giermańska, Joanna; Leal-Calderón, Fernando

doi:10.1016/j.jcis.2004.03.001

Cited by 246 publications

(216 citation statements)

References 13 publications

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“…The same holds for foams, as particles can accommodate at the water-air interface [28,29]. Pickering emulsions are of interest in a number of areas outside the realm of the oil industry [30,31]. This type of emulsions exhibits original rheological properties as well as considerable kinetic stability.…”

Section: Solid-stabilized Emulsions: Pickering Emulsionsmentioning

confidence: 99%

“…The wettability (three-phase contact angle) of the solids is a key factor in their potential to stabilize emulsions. Arditty et al [30] show that silica particles, with surfaces treated for wettability alteration, can be used to stabilize either O/W (partially hydrophilized silica) or W/O emulsions (hydrophobized silica). As a rule of thumb, the continuous phase of the emulsion is normally the one in which the particles are preferentially dispersed [31].…”

Section: Solid-stabilized Emulsions: Pickering Emulsionsmentioning

confidence: 99%

“…The removal of particles requires restoring fluid-fluid interfaces that demand thermodynamic work. The rheology of high concentration emulsions reflects the rigidity of the surface, which is not controlled by interfacial tension [30].…”

Section: Solid-stabilized Emulsions: Pickering Emulsionsmentioning

confidence: 99%

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Stability Proxies for Water-in-Oil Emulsions and Implications in Aqueous-based Enhanced Oil Recovery

2011

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Several researchers have proposed that mobility control mechanisms can positively contribute to oil recovery in the case of emulsions generated in Enhanced-Oil Recovery (EOR) operations. Chemical EOR techniques that use alkaline components or/and surfactants are known to produce undesirable emulsions that create operational problems and are difficult to break. Other water-based methods have been less studied in this sense. EOR processes such as polymer flooding and LoSal TM injection require adjustments of water chemistry, mainly by lowering the ionic strength of the solution or by decreasing hardness. The decreased ionic strength of EOR solutions can give rise to more stable water-in-oil emulsions, which are speculated to improve mobility ratio between the injectant and the displaced oil. The first step toward understanding the connection between the emulsions and EOR mechanisms is to show that EOR conditions, such as salinity and hardness requirements, among others, are conducive to stabilizing emulsions. In order to do this, adequate stability proxies are required. This paper reviews commonly used emulsion stability proxies and explains the advantages and disadvantage of methods reviewed. This paper also reviews aqueous-based EOR processes with focus on heavy oil to contextualize in-situ emulsion stabilization conditions. This context sets the basis for comparison of emulsion stability proxies.

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Section: Solid-stabilized Emulsions: Pickering Emulsionsmentioning

confidence: 99%

Section: Solid-stabilized Emulsions: Pickering Emulsionsmentioning

confidence: 99%

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Stability Proxies for Water-in-Oil Emulsions and Implications in Aqueous-based Enhanced Oil Recovery

2011

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“…[15][16][17][18][19][20][21][22][23][24] These emulsions that use solid materials as emulsifiers are called Pickering emulsions. Thus, we thought that the n-alkanol/ water emulsions using a-CD were a kind of Pickering emulsion.…”

Section: Fig 6 Microphotograph Of N-octanol/water Emulsion Using A-cdmentioning

confidence: 99%

Study on Preparation and Formation Mechanism of n-Alkanol/Water Emulsion Using .ALPHA.-Cyclodextrin

Hashizaki

Kageyama

Inoue

et al. 2007

CHEMICAL & PHARMACEUTICAL BULLETIN

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“…polysaccharides) or finely divided inert solids (such as silica and bentonite clays) (Tadros, 2004). Various authors have studied the effect of finely divided solids on the rheology and stability of emulsions (Pichot et al, 2009;Lagaly et al, 1999;Torres et al, 2007;Arditty et al, 2004). As was previously observed by Lagaly and co-workers (1999), clay mineral particles remaining in the external phase increase the apparent viscosity, which reduces the mobility of droplets and improves the stability of emulsions.…”

Section: Resultsmentioning

confidence: 94%

Characterization and stability studies of emulsion systems containing pumice

Estanqueiro

Conceição

Amaral

et al. 2014

Braz. J. Pharm. Sci.

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Emulsions are the most common form of skin care products. However, these systems may exhibit some instability. Therefore, when developing emulsions for topical application it is interesting to verify whether they have suitable physical and mechanical characteristics and further assess their stability. The aim of this work was to study the stability of emulsion systems, which varied in the proportion of the emulsifying agent cetearyl alcohol (and) sodium lauryl sulfate (and) sodium cetearyl sulfate (LSX), the nature of the oily phase (decyl oleate, cyclomethicone or dimethicone) and the presence or absence of pumice (5% w/w). While maintaining the samples at room temperature, rheology studies, texture analysis and microscopic observation of formulations with and without pumice were performed. Samples were also submitted to an accelerated stability study by centrifugation and to a thermal stress test. Through the testing, it was found that the amount of emulsifying agent affects the consistency and textural properties such as firmness and adhesiveness. So, formulations containing LSX (5% w/w) and decyl oleate or dimethicone as oily phase had a better consistency and remained stable with time, so exhibited the best features to be used for skin care products.Uniterms: Emulsions/topical use/stability study. Emulsions/topical use/characterization. Pumice/presence in emulsions. Emulsions/texture. Emulsions/rheology. Emulsions/spreadability.Emulsões são a forma de apresentação mais comum dos produtos para aplicação na pele. No entanto estes sistemas podem exibir alguma instabilidade. Por esta razão, quando do desenvolvimento de emulsões para aplicação tópica é importante verificar se estas apresentam propriedades físicas ou mecânicas adequadas e avaliar a sua estabilidade. O objetivo deste trabalho consistiu no estudo da estabilidade de emulsões, cujas variações entre elas foi a proporção de agente emulsificante álcool estearílico (mais) laurilsulfato de sódio (mais) estearilsulfato de sódio (LSX), a natureza da fase oleosa (decil oleato, ciclometicona ou dimeticona) e a presença ou ausência de pedra-pomes (5% m/m). Mantendo as amostras à mesma temperatura, realizaram-se o estudo da reologia, a análise de textura e observação microscópica das formulações com e sem pedra-pomes. Amostras foram, também, submetidas a estudo de estabilidade acelerada por centrifugação e a ensaio de estresse térmico. Através dos testes realizados, constatou-se que a quantidade de agente emulsificante influencia a consistência e as propriedades de textura, como a firmeza e a adesividade. As formulações contendo LSX (5% m/m) e decil oleato ou dimeticona como fase oleosa exibiram melhores caraterísticas como produtos para aplicação na pele, uma vez que estas formulações apresentaram menor firmeza e consistência e permaneceram estáveis com o tempo.

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Materials based on solid-stabilized emulsions

Cited by 246 publications

References 13 publications

Stability Proxies for Water-in-Oil Emulsions and Implications in Aqueous-based Enhanced Oil Recovery

Stability Proxies for Water-in-Oil Emulsions and Implications in Aqueous-based Enhanced Oil Recovery

Study on Preparation and Formation Mechanism of n-Alkanol/Water Emulsion Using .ALPHA.-Cyclodextrin

Characterization and stability studies of emulsion systems containing pumice

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