Formulating Middle Phase Microemulsions Using Extended Anionic Surfactant Combined with Cationic Hydrotrope

Kayali, Ibrahim; Qamhieh, Khawla; Olsson, Ulf

doi:10.1080/01932690903543303

Cited by 9 publications

(9 citation statements)

References 25 publications

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“…There are few cationic hydrotropes known, 1 and only in the past few years some sparse studies using quaternary ammonium-based salts were reported. 70–72 In summary, the results obtained here clearly support that ILs may constitute a novel series of cationic hydrotropes.…”

Section: Resultssupporting

confidence: 73%

The magic of aqueous solutions of ionic liquids: ionic liquids as a powerful class of catanionic hydrotropes

et al. 2015

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Hydrotropes are compounds able to enhance the solubility of hydrophobic substances in aqueous media and therefore are widely used in the formulation of drugs, cleaning and personal care products. In this work, it is shown that ionic liquids are a new class of powerful catanionic hydrotropes where both the cation and the anion synergistically contribute to increase the solubility of biomolecules in water. The effects of the ionic liquid chemical structures, their concentration and the temperature on the solubility of two model biomolecules, vanillin and gallic acid were evaluated and compared with the performance of conventional hydrotropes. The solubility of these two biomolecules was studied in the entire composition range, from pure water to pure ionic liquids, and an increase in the solubility of up to 40-fold was observed, confirming the potential of ionic liquids to act as hydrotropes. Using dynamic light scattering, NMR and molecular dynamics simulations, it was possible to infer that the enhanced solubility of the biomolecule in the IL aqueous solutions is related to the formation of ionic-liquid-biomolecules aggregates. Finally, it was demonstrated that hydrotropy induced by ionic liquids can be used to recover solutes from aqueous media by precipitation, simply by using water as an anti-solvent. The results reported here have a significant impact on the understanding of the role of ionic liquid aqueous solutions in the extraction of value-added compounds from biomass as well as in the design of novel processes for their recovery from aqueous media.

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Section: Resultssupporting

confidence: 73%

The magic of aqueous solutions of ionic liquids: ionic liquids as a powerful class of catanionic hydrotropes

et al. 2015

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“…IFT using spinning drop tensiometer, between brine and heptane, and between brine and middle phase for a system 0.5% AOT: TEAC (1:1) molar ratio, WOR = 1. of polyethylene-polypropylene oxide of extended surfactants give special properties of ultralow IFT and high solubilization capacity, and low CMC, such information is promising for detergency and EOR where concentrated amount of surfactant is needed. While studying Phase behavior of extended surfactant L123-4S with cationic hydrotropes Variquat-cc9 (1:1) molar ratio at low concentration reached 0.5% with water: heptane (1:1) weight ratio, the system produced ultralow IFT close to 0.00075 mN/m at optimum salinity, which are compatible with Kayali et al study [15]. The system meets winsor premises transition from winsor I to winsor III to winsor II Figure 13, it shows that it has optimal salinity at 3.25% NaCl concentration.…”

Section: Phase Behavior Of L123-4s/variquat-cc9 (1:1) Molar Ratio Worsupporting

confidence: 88%

Nanostructured Microemulsion Phase Behavior Using AOT or Extended Surfactant Combined with a Cationic Hydrotrope

Kanan¹,

Yousef²,

Kayali³

2012

JSEMAT

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The phase behavior for systems containing sodium bis (2-ethylhexyl sulfosuccinate) (AOT), with the cationic hydro-trope tetraethyl ammonium chloride (TEAC), in the presence of water and heptane were studied. Formulations of mi-croemulsion for such systems and for systems containing the so called “extended surfactant” were carried out at different salt concentrations. Anisotropy was detected using cross polarizers and polarized microscopy. Ultralow interfacial tension for microemulsion was measured, first theoretically using the Chun-Huh equation, and then experimentally using spinning drop experiments. The presence of short chain hydrotropes (TEAC) was found to destabilize the liquid crystalline region, observed in the AOT/water/heptane phase diagram. Ultralow interfacial tensions were observed for microemulsions formulated with surfactant concentrations as low as 0.5%, for both AOT and “extended surfactant” systems. The effect of temperature on the phase behavior of a microemulsion formed with AOT system was studied and found to behave in an opposite manner compared to the nonionic surfactant

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“…[11] These results demonstrate that we can make use of a synergistic effect resulting from the interaction of cationic and anionic head groups in formulating alcohol free microemulsion without risking the formation of crystalline precipitates or liquid crystals. Introducing a branched and short chain cationic hydrotrope like TBAB and variquat cc-9, will increase the spacing between the long tails of anionic surfactant leading to enhanced solubilization.…”

Section: Resultsmentioning

confidence: 90%

“…Alcohol free microemulsion using extended anionic surfactant combined with polypropylene oxide ammonium chloride was formulated, yielding ultra low IFT with a critical microemulsion concentration of 0.2 wt% surfactant. [11] In the present contribution, we investigate ternary phase diagram for the association structures formed by the extended surfactant C 12 (PO) 4 SO 4 , water and decane. The effect of adding the cationic hydrotrope, tetrabutylammonium bromide (TBAB) on the phase behavior is examined.…”

Section: Introductionmentioning

confidence: 99%

Phase Behavior of Microemulsions Formulated with Sodium Alkyl Polypropylene Oxide Sulfate and a Cationic Hydrotrope

Kayali

Qamhieh

Habjoqa

et al. 2012

Journal of Dispersion Science and Technology

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The partial ternary phase diagram of anionic extended surfactant of alkyl polypropylene oxide sulfate C 12 (PO) 4 SO 4 alone and combined with the cationic hydrotrope, tetrabutyl ammonium bromide with water and decane were determined under ambient conditions. Middle phase microemulsion was formulated using salinity scans in the dilute region of surfactant/brine/decane. Visual inspection as well as cross polarizer and optical microscopy were used to detect anisotropy. Spinning drop tensiometer was used to measure interfacial tension (IFT). The first ternary phase diagram using the extended surfactant alone showed three one phase regions, the anisotropic lamellar liquid crystalline phase, L a and the isotropic L 1 micellar liquid and L 3 sponge phase. In the second ternary phase diagram using the extended surfactant combined with tetra butyl ammonium bromide, an isotropic micellar region, L 1 , appeared in the diluted area of the phase diagram. Meanwhile the L a phase disappeared completely and the three phase region has a bluish transparent middle phase. Interfacial tension measurements between middle phase and brine, and between decane and brine yielded ultra low values. Calculated IFT values using the characteristic length obtained using De Gennes approximation gave almost half the measured values. The interfacial rigidity was also calculated and compared to values obtained from the literature.

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Formulating Middle Phase Microemulsions Using Extended Anionic Surfactant Combined with Cationic Hydrotrope

Cited by 9 publications

References 25 publications

The magic of aqueous solutions of ionic liquids: ionic liquids as a powerful class of catanionic hydrotropes

The magic of aqueous solutions of ionic liquids: ionic liquids as a powerful class of catanionic hydrotropes

Nanostructured Microemulsion Phase Behavior Using AOT or Extended Surfactant Combined with a Cationic Hydrotrope

Phase Behavior of Microemulsions Formulated with Sodium Alkyl Polypropylene Oxide Sulfate and a Cationic Hydrotrope

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