Effect of tetrabutylammonium bromide on the micelles of sodium dodecyl sulfate

Mata, Jitendra; Varade, Dharmesh; Ghosh, Goutam; Bahadur, Pratap

doi:10.1016/j.colsurfa.2004.07.009

Cited by 103 publications

(86 citation statements)

References 19 publications

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“…As discussed in the Introduction, cloud point phenomena, i.e., phase separation upon heating, is quite rare for ionic micellar fluids. In light of existing reports, [9][10][11][12][13][14][15][16] there appear to be two key requirements for clouding to occur in solutions containing an ionic surfactant Figure 8. SANS scattering at 25°C from NaOA solutions containing quarternary and tertiary ammonium salts.…”

Section: Discussionmentioning

confidence: 99%

“…Subsequently, a range of similar quarternary ammonium salts (R 4 N + ) was investigated by others in conjunction with anionic surfactants such as SDS. [11][12][13][14][15][16] Cloud points were found when the alkyl moiety (R) was quite large (e.g., butyl and above). The viscosities of these micellar solutions were reported to be at most 5 times that of water, suggesting that the micelles are quite small (ellipsoids, short rods, or spheres).…”

Section: Introductionmentioning

confidence: 99%

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Anionic Wormlike Micellar Fluids that Display Cloud Points: Rheology and Phase Behavior

2005

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We report our investigations into the self-assembly of sodium oleate (NaOA) in the presence of a binding salt (triethylammonium chloride, Et 3 NHCl) simple salt (potassium chloride, KCl). Both salts promote the growth of long, wormlike micelles in NaOA solutions, thereby increasing the fluid viscosity. The significant difference with the Et 3 NHCl salt is that it also modifies the phase behavior of NaOA solutions. Specifically, NaOA/Et 3 NHCl solutions display cloud points upon heating, followed by phase separation into two liquid phases. Such cloud point behavior is rarely observed in ionic surfactant systems, although it is common in nonionic surfactant solutions. Interestingly, while cloud points are not observed with KCl, the addition of KCl to NaOA/Et 3 NHCl solutions further lowers the cloud point temperature. Also, in the case of tetraethylammonium halide salt, neither a cloud point nor an increase in viscosity is observed. The clouding in the case of Et 3 NHCl is attributed to the temperature-induced aggregation of anionic micelles whose surface is covered by bound counterions.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Anionic Wormlike Micellar Fluids that Display Cloud Points: Rheology and Phase Behavior

2005

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“…The degrees of micelle ionization along with the free energies associated with aggregation, micellization and transfer have been discussed. Mata et al [61] have reported the surface activity and solution behavior of Pluronic P105 (PEO-PPO-PEO), the anionic surfactant SDS, cationic DTAB and their binary mixtures in the absence and presence of NaBr. P105 interacted more strongly with SDS than DTAB.…”

Section: Polymer-amphiphile Interactionsmentioning

confidence: 99%

Polymer-Amphiphile Interactions: An Overview

Panda

Kamil

2017

Eurasian Chem. Tech. J.

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Interactions between the polymers and amphiphiles in aqueous solutions have generated considerable interest among researchers because of the widespread applications, relatively complex behavior and improved physicochemical properties of the mixtures. Numerous studies on the surfactant-polymer systems have been carried out in recent years and the number of scientific reports has considerably increased. Various applications of polymers in different areas and many works concerning the amphiphiles are being published every year. Usually, the mixed systems containing polymers and amphiphiles show solution properties different from those of individual solutions due to interaction between the components. The present review article mainly focuses on the behaviour of polymers in aqueous solutions, in the absence or presence of amphiphiles, such as surfactants, drugs, etc. It also summarizes effect of the nature of amphiphiles on aggregation properties of polymers in aqueous solution, and interaction of conventional as well as gemini surfactants with polymers.

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“…An important property of micelles that has particular significance in pharmacy is their ability to increase the solubility of sparingly soluble substances (Mitra et al, 2000, Kelarakis et al, 2004, Mata et al, 2004, 2005. A number of approaches have been taken to measure the solubilizing behavior of amphiphiles in which the solubilization of a water insoluble dye in the surfactant micelles was studied.…”

Section: Dye Solubilization Measurementsmentioning

confidence: 99%