Interfacial Properties and Emulsification of Biocompatible Liquid-Liquid Systems

A comparative study is reported on the interfacial properties of a set of surfactants and is discussed in terms of the effects on the features of the corresponding oil-water emulsions. The surfactants are saponin, Tween 80 and citronellol glucoside (CG), while the oil is Miglyol 812N—A Medium Chain Triglyceride (MCT) oil. Due to their high biocompatibility, all these compounds are variously utilized in food, cosmetic or pharmaceutical products. Among the surfactants, which are all soluble in water, CG presents also an important solubility in oil, as shown by the measured partition coefficient. For these systems, dynamic and equilibrium interfacial tensions and dilational viscoelasticity are measured as a function of the surfactant concentration and analyzed according to available adsorption models. In order to compare these results with the time evolution of the corresponding emulsions, the actual surfactant concentration in the matrix phase of the emulsion is accounted for. This may differ significantly from the nominal concentration of the solutions before dispersing them, because of the huge area of droplets available for surfactant adsorption in the emulsion. Using this approach allows the derivation of the correlations between the observed emulsion behavior and the actual surfactant coverage of the droplet interface.

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Carbon Nanotubes and Polydopamine Modified Poly(dimethylsiloxane) Sponges for Efficient Oil–Water Separation

Materials ◽

10.3390/ma14092431 ◽

2021 ◽

Vol 14 (9) ◽

pp. 2431

Author(s):

Wen Zhang ◽

Juanjuan Wang ◽

Xue Han ◽

Lele Li ◽

Enping Liu ◽

...

Keyword(s):

Carbon Nanotubes ◽

Large Scale ◽

Absorption Capacity ◽

Potential Candidate ◽

Hard Template ◽

Water Separation ◽

Industrial Oil ◽

The Matrix ◽

Oil Water Separation ◽

Oil Water

In this paper, effective separation of oil from both immiscible oil–water mixtures and oil-in-water (O/W) emulsions are achieved by using poly(dimethylsiloxane)-based (PDMS-based) composite sponges. A modified hard template method using citric acid monohydrate as the hard template and dissolving it in ethanol is proposed to prepare PDMS sponge composited with carbon nanotubes (CNTs) both in the matrix and the surface. The introduction of CNTs endows the composite sponge with enhanced comprehensive properties including hydrophobicity, absorption capacity, and mechanical strength than the pure PDMS. We demonstrate the successful application of CNT-PDMS composite in efficient removal of oil from immiscible oil–water mixtures within not only a bath absorption, but also continuous separation for both static and turbulent flow conditions. This notable characteristic of the CNT-PDMS sponge enables it as a potential candidate for large-scale industrial oil–water separation. Furthermore, a polydopamine (PDA) modified CNT-PDMS is developed here, which firstly realizes the separation of O/W emulsion without continuous squeezing of the sponge. The combined superhydrophilic and superoleophilic property of PDA/CNT-PDMS is assumed to be critical in the spontaneously demulsification process.

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Microencapsulation of Flaxseed Oil—State of Art

Processes ◽

10.3390/pr9020295 ◽

2021 ◽

Vol 9 (2) ◽

pp. 295

Author(s):

Asma Yakdhane ◽

Sabrine Labidi ◽

Donia Chaabane ◽

Anita Tolnay ◽

Arijit Nath ◽

...

Keyword(s):

Fatty Acids ◽

Gum Arabic ◽

Tween 80 ◽

Flaxseed Oil ◽

Review Article ◽

Wall Material ◽

Physico Chemical ◽

Comprehensive Information ◽

The Matrix

Microencapsulation is a well-known technology for the lipid delivery system. It prevents the oxidation of fatty acids and maintains the quality of lipid after extraction from oil seed and processing. In flaxseed oil, the amount of ω-3 and ω-6 polyunsaturated fatty acids are 39.90–60.42% and 12.25–17.44%, respectively. A comprehensive review article on the microencapsulation of flaxseed oil has not been published yet. Realizing the great advantages of flaxseed oil, information about different technologies related to the microencapsulation of flaxseed oil and their characteristics are discussed in a comprehensive way, in this review article. To prepare the microcapsule of flaxseed oil, an emulsion of oil-water is performed along with a wall material (matrix), followed by drying with a spray-dryer or freeze-dryer. Different matrices, such as plant and animal-based proteins, maltodextrin, gum Arabic, and modified starch are used for the encapsulation of flaxseed oil. In some cases, emulsifiers, such as Tween 80 and soya lecithin are used to prepare flaxseed oil microcapsules. Physico-chemical and bio-chemical characteristics of flaxseed oil microcapsules depend on process parameters, ratio of oil and matrix, and characteristics of the matrix. As an example, the size of the microcapsule, prepared with spray-drying and freeze-drying ranges between 10–400 and 20–5000 μm, respectively. It may be considered that the comprehensive information on the encapsulation of flaxseed oil will boost the development of functional foods and biopharmaceuticals.

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Adsorption Kinetics and Rheological Interfacial Properties of Plant Proteins at the Oil−Water Interface

Biomacromolecules ◽

10.1021/bm049739h ◽

2004 ◽

Vol 5 (6) ◽

pp. 2088-2093 ◽

Cited By ~ 36

Author(s):

V. Ducel ◽

J. Richard ◽

Y. Popineau ◽

F. Boury

Keyword(s):

Adsorption Kinetics ◽

Interfacial Properties ◽

Water Interface ◽

Plant Proteins ◽

Oil Water

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Effect of alkali on Daqing crude oil/water interfacial properties

Petroleum Science ◽

10.1007/bf03186576 ◽

2007 ◽

Vol 4 (1) ◽

pp. 66-69 ◽

Cited By ~ 2

Author(s):

Guo Jixiang ◽

Li Mingyuan ◽

Lin Meiqin ◽

Wu Zhaoliang

Keyword(s):

Crude Oil ◽

Interfacial Properties ◽

Oil Water

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Study of the Activity of 3-benzyl-5-(4-chloro-arylazo)-4-thioxo-imidazolidin-2-one against Schistosomiasis Mansoni in Mice

The Scientific World JOURNAL ◽

10.1100/2012/520524 ◽

2012 ◽

Vol 2012 ◽

pp. 1-8 ◽

Cited By ~ 2

Author(s):

Andréa Cristina Apolinário da Silva ◽

Juliana Kelle de Andrade Lemoine Neves ◽

João Inácio Irmão ◽

Vláudia Maria Assis Costa ◽

Valdênia Maria Oliveira Souza ◽

...

Keyword(s):

Specific Antigen ◽

Tween 80 ◽

Histopathological Analysis ◽

Second Phase ◽

No Production ◽

Potential Candidate ◽

Treatment Regimens ◽

Morphological Aspects ◽

Oil Water

Previous studies conducted with the imidazolidinic derivative 3-benzyl-5-(4-chloro-arylazo)-4-thioxo-imidazolidin-2-one (LPSF-PT05) show outstanding activity against adultSchistosoma mansoniwormsin vitro. In the first phase of this study,S. mansoni-infected mice were treated, orally, with 100 mg/Kg of the LPSF-PT05 in three formulations: Tween 80 and saline solution, oil/water (70 : 30) emulsion, and solid dispersion with polyethylene glycol (PEG). In the second phase, three other doses of the LPSF-PT05 in PEG were tested: 3, 10, 30 mg/kg. These treatment regimens significantly reduced the number of recovered worms due to increases in the solubility of the compound in this formulation; the greatest reduction (70.5%) was observed at the dose of 100 mg/kg. There was no changes in the pattern of mature egg compared to immature eggs; however there was a significant increase in the number of dead eggs. Histopathological analysis of liver tissue showed changes in morphological aspects of the hepatic parenchyma with decrease exudative-productive hepatic granuloma stages, although we found no significant differences in IFN-γ, IL-4, IL-10, or NO production in response to the specific antigen SEA. The results show the derivative LPSF-PT05 to be a potential candidate in the etiological treatment of schistosomiasis with a possible dampening effect of the granulomatous process.

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