Effect of temperature on pseudoternary system Tween-80–butanol–hexane–water

Mukherjee, Partha; Padhan, Susanta Kumar; Dash, Sukalyan; Patel, Sabita; Mohapatra, P. Κ.; Mishra, Bijay K.

doi:10.1016/j.jcis.2010.12.021

Cited by 19 publications

(11 citation statements)

References 44 publications

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“…The larger the micelle size, the greater the viscosity of the mixture, promoting the growth of the emulsion area and the gel-like appearance. This effect was also observed by other authors who reported that the replacement of water by brine provoked the appearance of gel-like structures in the low emulsifier and higher oil proportion domain [27].…”

Section: Effect Of Brinesupporting

confidence: 85%

“…The water/n-hexane system with the non-toxic, biodegradable, and non-ionic surfactant, Tween 80, was studied according to phase behaviour and structure, broadening previous researches made in a similar system, which were concentrated in temperature effect and molecular structure, respectively [27,35]. In our study concretely, the effect of additives such as alcohols (1-butanol and ethanol) and brine was considered as well as their combined influence with temperature.…”

Section: Resultsmentioning

confidence: 99%

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Performance of the Biocompatible Surfactant Tween 80, for the Formation of Microemulsions Suitable for New Pharmaceutical Processing

Prieto

Calvo

2013

Journal of Applied Chemistry

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The aim of this work was to investigate the phase behaviour and the structure of the n-hexane/water emulsions based on a nonionic, nontoxic and biocompatible surfactant, Tween 80. This system is of interest for new pharmaceutical techniques based on supercritical fluids to form nano- and encapsulated particles. However, it showed a lack of stability denoted by large areas of macroemulsion. For this reason, the effect of additives (alcohols and brine) and external variables (temperature) were explored. The replacement of water by brine caused negligible impact due to the nonionic character of Tween 80. On the contrary, the presence of an alcohol (ethanol or 1-butanol) enhanced the solubility of the surfactant in the oil phase and decreased the mixture viscosity, resulting in improved surface activity. Similar results were obtained by raising the temperature until the cloud point was reached (60°C). With these modifications, microemulsions at relatively low concentrations of surfactant (around 30%) and within a broad interval of compositions could be obtained, widening their possible use in pharmaceuticals manufacturing (such as controlled drug delivery, enzymatic reactions, or excipient processing). The understanding of the surfactant performance could be further used to substitute the n-hexane by a greener solvent, such as supercritical CO2.

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Section: Effect Of Brinesupporting

confidence: 85%

Section: Resultsmentioning

confidence: 99%

Performance of the Biocompatible Surfactant Tween 80, for the Formation of Microemulsions Suitable for New Pharmaceutical Processing

Prieto

Calvo

2013

Journal of Applied Chemistry

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“…Analogous observations were seen during clouding phenomena of microemulsion formed from Tween-80-n-butanol-hexane-water [21] and Tween-80-n-butanol-kerosenewater [22] systems. However, the maximum temperature required for obtaining three-phase separation depends on the types of oil present in the systems: hexane (58 C), kerosene (78 C), and diesel (93 C).…”

Section: Temperature Induced Three-phase Separationsupporting

confidence: 68%

Tween-80–n-Butanol–Diesel–Water Microemulsion System—A Class of Alternative Diesel Fuel

Acharya

Guru

Dash

2014

Journal of Dispersion Science and Technology

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Tween-80-n-butanol-diesel-water microemulsion systems with various surfactant:cosurfactant (S:C) ratio have been reported as a class of alternative diesel fuel from their phase behavior, clouding phenomena, conductivity, turbidity, and inflammation studies. Temperature induced clouding of microemulsion containing 2% brine at an S:C ratio of 1:1 from a suitable turbid zone has been examined to see the stability of the diesel-water microemulsion systems. Regression models have been proposed to understand the impact of various components of the microemulsion on their cloud point (CP) values. Conductivity of the microemulsions at various S:C ratio increases with the volume of brine having two cut points depicting the presence of three microheterogenous phases within the system, whereas turbidity shows a linear increase. Dye-probed investigation of water-rich and oil-rich zones of the microemulsions indicates the involvement of a dynamic mass transfer process within the various zones. The intensities of flames produced during burning of the microemulsions with various O:E:W weight percentages selected from the isotropic regions of the phase diagrams have been estimated using MATLAB image processing method and the impacts of various components on the fuel use of the microemulsions have been analyzed.

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“…The role of the cosurfactant in formulation of the ME is to stabilize the surfactant at its wider surface. [16,17] The pseudoternary phase diagram containing Tween 80=Span 80=ethanol=soybean oil=H 2 O was formulated as in Figure 2.…”

Section: Determination Of Me Systemmentioning

confidence: 99%

“…The addition of NaCl may have promoted the spontaneous curvature of the surfactant monolayer and increased the free energy of the system, which could have destabilized the ME system. [17] The ternary phase diagram of the Tween 80= Span 80=ethanol=soybean oil=H 2 O system at varying pH values of 4.0, 5.0, and 7.0 is shown in Figure 3b. The ME regions reduced slightly with decrease in pH, but this change was not marked.…”

Section: Effects Of Ph Salinity and Temperature On Mementioning

confidence: 99%

Application of Tea Polyphenols to Edible Oil as Antioxidant by W/O Microemulsion

Sun

Liu

Wang

2015

Journal of Dispersion Science and Technology

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The lipophilic properties of tea polyphenols have restricted their application as a natural antioxidant in oils. In order to increase the weight percentage of tea polyphenols in edible oil, a water-in-oil (W/O) microemulsion (ME) of Tween 80/Span 80/ethanol/soybean oil/H 2 O for envelopment of tea polyphenols was prepared. The ternary phase diagram, electrical conductivity, particle size, viscosity, rheological behavior, and oxidation resistance potential of the ME were investigated. The results showed that (1) the W/O ME formed when water content was below 30%; (2) the mean particle size of the ME system was about 8.40 nm and basically remained stable for 45 days; (3) the ME was characterized as pseudoplastic at low shear rate and as Newtonian viscous fluid at high shear rate; moreover, it had acceptable salinity and pH tolerance; and (4) peroxide value determination indicated the antioxidant effect of the ME was enhanced by the addition of tea polyphenols.

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Effect of temperature on pseudoternary system Tween-80–butanol–hexane–water

Cited by 19 publications

References 44 publications

Performance of the Biocompatible Surfactant Tween 80, for the Formation of Microemulsions Suitable for New Pharmaceutical Processing

Performance of the Biocompatible Surfactant Tween 80, for the Formation of Microemulsions Suitable for New Pharmaceutical Processing

Tween-80–n-Butanol–Diesel–Water Microemulsion System—A Class of Alternative Diesel Fuel

Application of Tea Polyphenols to Edible Oil as Antioxidant by W/O Microemulsion

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