Interfacial composition, thermodynamic properties and structural parameters of water-in-oil microemulsions stabilized by 1-pentanol and mixed anionic + polyoxyethylene type nonionic surfactants

Kundu, Kaushik; Paul, Bidyut K.

doi:10.1007/s00396-012-2763-2

Cited by 18 publications

(14 citation statements)

References 82 publications

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“…Very recently, structural parameters for mixed ionic/ non-ionic surfactant microemulsions have been evaluated by our groups [49,50]. For mixed surfactant microemulsion systems, equations related to A s , V s and V s h were modified accordingly and those are presented as follows:…”

Section: Structural Parameters For Single and Mixed Surfactants Micromentioning

confidence: 99%

“…Earlier, Hait and Moulik observed that the b values for water/SDS or CPC or CTAB/butan-1-ol/IPM microemulsion systems were found to vary fairly linear with temperature, while the slopes and intercepts of the linear plots between n a /n s against n o /n s showed exponential dependence on the amount of surfactants [43]. Recently, we have extended the physicochemical concept of b-parameter to interpret it as an indicator of evaluation of K d , DG t 0 and n a o with regard to its temperature dependence from semiquantitative analysis [50]. It was revealed from the plot of b values versus X Brij-58 or Brij-78 (shown in Fig.…”

Section: Correlation Of the B Parameter With Process Thermodynamicsmentioning

confidence: 99%

“…Kundu and Paul [50] presented the mathematical relationship used to evaluate the b parameter as a function of K d (distribution constant) or DG t 0 (free energy of transfer of cosurfactant from interface to bulk oil) or n a o (the moles of cosurfactant in the bulk oil) or temperature.…”

Section: Correlation Of the B Parameter With Process Thermodynamicsmentioning

confidence: 99%

“…Recently, Kundu and Paul [50] emphasized on the role of oil penetration by the interfacial film of the microemulsions, which modified the packing geometry of the surfactant unit. The packing geometry of the surfactant unit was modified to describe a swollen chain volume; thus v c ?…”

Section: Packing Parameter For Single and Mixed Surfactant Microemulsmentioning

confidence: 99%

See 3 more Smart Citations

The Schulman Method of Cosurfactant Titration of the Oil/Water Interface (Dilution Method): A Review on a Well‐Known Powerful Technique in Interfacial Science for Characterization of Water‐in‐Oil Microemulsions

Bardhan

Kundu

Chakraborty

et al. 2015

J Surfact & Detergents

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Microemulsions are thermodynamically stable, isotropic transparent mixtures of two immiscible liquids (polar and nonpolar) and amphiphile(s) (usually surfactant and/or cosurfactant). The cosurfactant plays an important role by blending with surfactants, and partitioned between the coexisting aqueous and oleic phases to control the bending elasticity of the interfacial layer to render stability to the dispersion. The microheterogeneity of such dispersions makes them useful in biological and technological applications. Various techniques viz., conductance, interfacial tension, SANS etc. were applied to estimate the distribution of cosurfactant between the interface and the bulk oil. However, a simple but ingenious method comprising repetitively oil dilution with cosurfactant titration till attainment of stable microemulsions was also used to measure the distribution of cosurfactant. This review summarizes formation and characterization of water-in-oil microemulsions stabilized by single or mixed surfactants of different charge types and polar head groups or mixed surface active ionic liquid and surfactant, and cosurfactants of different lipophilicities in both hydrocarbons and long chain alkyl ester oil, emphasizing interfacial composition, thermodynamics of formation and structural parameters by the dilution method coupled with transport properties, microstructures and states of water organization inside the pool etc. using instrumental techniques. Applicability of the data obtained from dilution method in different areas, viz. nanomaterial synthesis, enzyme activity, etc. have been reported. Indeed, this article presented a journey of development and significant contribution in utilizing this elegant and inexpensive method to accomplish the formation of microemulsion through consistent motivation by researchers of different countries.

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Section: Structural Parameters For Single and Mixed Surfactants Micromentioning

confidence: 99%

Section: Correlation Of the B Parameter With Process Thermodynamicsmentioning

confidence: 99%

Section: Correlation Of the B Parameter With Process Thermodynamicsmentioning

confidence: 99%

Section: Packing Parameter For Single and Mixed Surfactant Microemulsmentioning

confidence: 99%

See 2 more Smart Citations

The Schulman Method of Cosurfactant Titration of the Oil/Water Interface (Dilution Method): A Review on a Well‐Known Powerful Technique in Interfacial Science for Characterization of Water‐in‐Oil Microemulsions

Bardhan

Kundu

Chakraborty

et al. 2015

J Surfact & Detergents

Self Cite

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show abstract

“…In kinetics and equilibrium studies, an extra thermodynamic linear correlation between the enthalpy and entropy changes is often reported for the process involved, called the enthalpy-entropy compensation effect [26]. The compensation effect is observed when a series of structurally related substrates undergo the same general process or when the process conditions for a single substrate are changed in a systematic way [27].…”

Section: Enthalpy-entropy Compensationmentioning

confidence: 99%

An Energetic Analysis of the Phase Separation in Non-Ionic Surfactant Mixtures: The Role of the Headgroup Structure

Hierrezuelo

Molina-Bolı́var

Ruiz

2014

Entropy

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Abstract:The main goal of this paper was to examine the effect of the hydrophilic surfactant headgroup on the phase behavior of non-ionic surfactant mixtures. Four mixed systems composed of an ethoxylated plus sugar-based surfactants, each having the same hydrophobic tail, were investigated. We found that the hydrophilicity of the surfactant inhibits the tendency of the system to phase separate, which is sensitive to the presence of NaCl. Applying a classical phase separation thermodynamic model, the corresponding energy parameters were evaluated. In all cases, the parameters were found to depend on the type of nonionic surfactant, its concentration in the micellar solution and the presence of NaCl in the medium. The experimental results can be explained by assuming the phase separation process takes place as a result of reduced hydration of the surfactant headgroup caused by a temperature increase. The enthalpy-entropy compensation plot exhibits excellent linearity. We found that all the mixed surfactant systems coincided on the same straight line, the compensation temperature being lower in the presence of NaCl.

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Interfacial composition and solubilization of microemulsion systems containing mixed surfactants C12mimBr and Brij35: effects of surfactant composition, temperature, and salinity

Pan

Chai

et al. 2018

Colloid Polym Sci

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Interfacial composition, thermodynamic properties and structural parameters of water-in-oil microemulsions stabilized by 1-pentanol and mixed anionic + polyoxyethylene type nonionic surfactants

Cited by 18 publications

References 82 publications

The Schulman Method of Cosurfactant Titration of the Oil/Water Interface (Dilution Method): A Review on a Well‐Known Powerful Technique in Interfacial Science for Characterization of Water‐in‐Oil Microemulsions

The Schulman Method of Cosurfactant Titration of the Oil/Water Interface (Dilution Method): A Review on a Well‐Known Powerful Technique in Interfacial Science for Characterization of Water‐in‐Oil Microemulsions

An Energetic Analysis of the Phase Separation in Non-Ionic Surfactant Mixtures: The Role of the Headgroup Structure

Interfacial composition and solubilization of microemulsion systems containing mixed surfactants C12mimBr and Brij35: effects of surfactant composition, temperature, and salinity

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