Ostwald ripening of nanoemulsions stopped by combined interfacial adsorptions of molecular and macromolecular nonionic stabilizers

Chebil, Asma; Desbrières, Jacques; Nouvel, Cécile; Six, Jean‐Luc; Durand, Alain

doi:10.1016/j.colsurfa.2013.02.028

Cited by 39 publications

(26 citation statements)

References 34 publications

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“…This process could also be explained by the classical disperse system instability theory: Ostwald ripening. According to this theory, smaller drops have higher chemical potential, and larger droplets will grow at the cost of the smaller ones to reduce the potential energy of the whole system [22,23,24,25,26]. Asma Chebil et al have reported similar results [26].…”

Section: Resultsmentioning

confidence: 97%

“…According to this theory, smaller drops have higher chemical potential, and larger droplets will grow at the cost of the smaller ones to reduce the potential energy of the whole system [22,23,24,25,26]. Asma Chebil et al have reported similar results [26]. The droplet growth rate (ω) can be calculated using the following equation [25,26]:ω=drc3dt=8DC∞Vm2γ9RT where ω is the ripening rate, C∞ is the solubility of the dispersed phase at the planar interface, r c is the number average radius of the particles at a given time, V m is the molar volume of the dispersed phase material, D is the translational diffusion coefficient of the dissolved dispersed phase in the continuous phase, γ is the interfacial tension between the dispersed and the continuous phases, ρ is the density of the oil (kg/m 3 ), R is the universal gas constant, and T is the absolute temperature.…”

Section: Resultsmentioning

confidence: 99%

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Preparation and Property of Perfluoropolyether Emulsions

Zhang

Zhang²,

Bai³

et al. 2019

Polymers

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Perfluoropolyether (PFPE) glycerol emulsions were prepared. Three different green surfactants (AES (sodium laureth sulfate), APG (alkyl polyglycoside), and SDS (sodium dodecyl sulfate)) were chosen to emulsify the PFPE. Their properties and performance in shampoo were also investigated. Centrifuge stability measurements show that three PFPE emulsions have good stability. They are stable for 60 min when the centrifugal speed is 6000 r/min. In addition, a change of droplet size was observed with time. Moreover, its rheological properties and application performance was studied. The AES emulsion was the most stable emulsion and it was found to improve the slip and lubricity performance of the cotton, so it has potential applications in shampoo.

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Section: Resultsmentioning

confidence: 97%

Section: Resultsmentioning

confidence: 99%

Preparation and Property of Perfluoropolyether Emulsions

Zhang

Zhang²,

Bai³

et al. 2019

Polymers

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“…Additionally, recent studies suggest that the use of nonionic surfactants associated with amphiphilic polymers could contribute to the formation of a viscoelastic (and therefore more resistant) interfacial film at the oil/water interface and thus prevent the occurrence of this phenomenon. Such strategy can be used in later studies to improve this nanoemulsified system (Figures 8 and 9) [17,[23][24][25][26][27].…”

Section: Stability Testsmentioning

confidence: 99%

Characterization and Stability Studies on Vegetable Nanoemulsions Obtained by Low Energy Process

Maruno¹

2017

J Nanomed Nanotechnol

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Background: The use of vegetable oils in the pharmaceutical and cosmetic industry is becoming increasingly attractive worldwide. Native to Cerrado biome of Brazil, we can mention baru seeds, which oil has a high degree of unsaturation. Its major constituents are the fatty acids oleic and linoleic, and, besides that it contains significant amounts of tocopherols and phytosterols. Emulsified systems are the most common form presentation of industrial products. Its excellent ability to solubilize hydrophilic and lipophilic compounds explains its scientific and commercial importance. The design of these systems requires knowledge of the main factors that influence their formation, consequently, stability and performance. The objective of this research was the development and characterization of a nanoemulsion with baru oil using an economic process. The steps involved in the planning process of development of the systems were: 1) choice of emulsification methodology 2) development and characterization of formulations; 3) stability studies. Results: The use of low energy emulsification methodology so, a low-cost process, allow obtention of stable nanoemulsion having particle size distribution between 100.67 ± 8.39 and 111.45 ± 5.44 nm. The study of the physicochemical properties of the formulations showed no signs of instability of the formulations during the storage period under specific temperature conditions and the nanoemulsion has fine appearance, translucent aspect and bluish reflect, which are in accordance with the concept of nanoemulsions. Conclusions: The optimization of composition variables to minimize droplet size and polydispersity index allowed the obtention of a stable nanoemulsion by using a classic and low cost methodology. The developed system may be a good alternative delivery system, particularly because the use of vegetable oil follows a global trend of using renewable resources for sustainable development in cosmetic and pharmaceutical industry.

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“…This happens due to the capacity of Brownian motion to reduce the force of gravity [ 4 ]. Ostwald ripening is the main instability process on nanoemulsions, because the small droplet size results in a higher driving force (Laplace pressure) [ 5 , 6 ]. The preparation method is very important for the formation and stability of nanoemulsions [ 7 , 8 , 9 ].…”

Section: Introductionmentioning

confidence: 99%

Production and Characterization of Cosmetic Nanoemulsions Containing Opuntia ficus-indica (L.) Mill Extract as Moisturizing Agent

et al. 2015

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This study aimed to produce and characterize an oil in water (O/W) nanoemulsion containing Opuntia ficus-indica (L.) Mill hydroglycolic extract, as well as evaluate its preliminary and accelerated thermal stability and moisturizing efficacy. The formulations containing 0.5% of xanthan gum (FX) and 0.5% of xanthan gum and 1% of Opuntia ficus-indica MILL extract (FXE) were white, homogeneus and fluid in aspect. Both formulations were stable during preliminary and accelerated stability tests. FX and FXE presented a pH compatible to skin pH (4.5–6.0); droplet size varying from 92.2 to 233.6 nm; a polydispersion index (PDI) around 0.200 and a zeta potential from −26.71 to −47.01 mV. FXE was able to increase the water content of the stratum corneum for 5 h after application on the forearm. The O/W nanoemulsions containing 1% of Opuntia ficus-indica (L.) Mill extract presented suitable stability for at least for 60 days. Besides, this formulation was able to increase the water content of stratum corneum, showing its moisturizing efficacy.

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Ostwald ripening of nanoemulsions stopped by combined interfacial adsorptions of molecular and macromolecular nonionic stabilizers

Cited by 39 publications

References 34 publications

Preparation and Property of Perfluoropolyether Emulsions

Preparation and Property of Perfluoropolyether Emulsions

Characterization and Stability Studies on Vegetable Nanoemulsions Obtained by Low Energy Process

Production and Characterization of Cosmetic Nanoemulsions Containing Opuntia ficus-indica (L.) Mill Extract as Moisturizing Agent

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