Interaction between Anionic Dye ECAB, Micelle of Triton X-100 in Aqueous Solution and Hemimicelie at Solid/Liquid Interface

Yueying, Gao; Yu, Chunsong; An, Guohong

doi:10.1080/01932690008913267

Cited by 5 publications

(2 citation statements)

References 9 publications

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“…A number of studies have been focused on to dye/conventional surfactant interaction which are important in understanding the chemical equilibria, mechanisms and kinetics of surfactant-sensitized color and/or fluorescence reactions [12][13][14] . The nature of interactions involved in aqueous ionic dyes and oppositely charged ionic surfactants have been reported previously 7,15,16 .…”

Section: Introductionmentioning

confidence: 99%

Spectrophotometric and Conductometric Studies on the Interaction of Anionic Dye Eosin-Y with Cationic Micelles

Erdinç¹,

Göktürk²

2014

Analytical Chemistry Letters

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In this paper, spectrophotometric and conductometric methods were used to study the interaction phenomenon between oppositely charged anionic Eosin-Y and cationic surfactants; dodecyltrimethylammonium bromide, tetradecyltrimethylammonium bromide, cetyltrimethylammonium bromide, cetylpyridinium bromide and cetylpyridinium chloride. Conductivity measurements of surfactants were performed and the degree of micellar ionization was determined in the absence and presence of Eosin-Y. The ionization degree and counterion binding parameter obtained from conductivity data are used to evaluate the interaction mechanism of Eosin-Y in wide range of different hydrophobic cationic microenvironments as well. The absorption spectra were used to quantify the binding constants by means of Benesi-Hildebrand equation. Comparison of the binding degree of Eosin-Y to micelles indicates a direct correlation between binding constant and hydrophobicity. The micellar properties of cationic surfactants at levels below and above their CMCs in aqueous and in the presence of Eosin-Y were also studied using conductivity and spectrophotometry. It was observed that the CMC values of cationic surfactants decreased in the presence of Eosin-Y. The spectrophotometric behavior of Eosin-Y in water-EOH mixture of varying composition was also monitored in order to gain more information about the localization of Eosin-Y in cationic micelles.

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Section: Introductionmentioning

confidence: 99%

Spectrophotometric and Conductometric Studies on the Interaction of Anionic Dye Eosin-Y with Cationic Micelles

Erdinç¹,

Göktürk²

2014

Analytical Chemistry Letters

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“…It is known that nonionic surfactants, such as Triton X-100, can adsorb on silica surface in aqueous solution (45)(46)(47)(48)(49)(50)(51)(52)(53). The oxyethylene groups of TX100 molecules attach onto silica surface through hydrogen bonding with the neutral silanol surface groups.…”

Section: Effect Of Ph On Silica Partition In the Dex/tx100 Systemmentioning

confidence: 99%

Aqueous Biphase Extraction for Processing of Fine Coal

Osseo‐Asare¹

2001

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Ever-stringent environmental constraints dictate that future coal cleaning technologies be compatible with micron-size particles. This research program seeks to develop an advanced coal cleaning technology uniquely suited to micron-size particles, i.e., aqueous biphase extraction. The partitioning behaviors of silica in the polyethylene glycol (PEG)/dextran (Dex) and dextran/Triton X-100 (TX100) systems have been investigated, and the effects of sodium dodecylsulfate (SDS) and dodecyltrimethylammonium bromide (DTAB) on solid partition have been studied. In both biphase systems, silica particles stayed in the top PEG-rich phase at low pH. With increase in pH, the particles moved from the top phase to the interface, then to the bottom phase. At very high pH, the solids preferred the top phase again. These trends are attributable to variations in the polymer/solid and nonionic surfactant/solid interactions. Addition of ionic surfactants into these two systems introduces a weakly charged environment, since ionic surfactants concentrate into one phase, either the top phase or the bottom phase. Therefore, coulombic forces also play a key role in the partition of silica particles because electrostatic attractive or repulsive forces are produced between the solid surface and the ionic-surfactant-concentrated phase. For the PEG/dextran system in the presence of SDS, SiO 2 preferred the bottom dextran-rich phase above its pH PZC . However, addition of DTAB moved the oxide particles from the top phase to the interface, and then to the bottom phase, with increase in pH. These different behaviors are attributable to the fact that SDS and DTAB concentrated into the opposite phase of the PEG/dextran system. On the other hand, in the dextran/Triton X-100 system, both ionic surfactants concentrated in the top surfactant-rich phase and formed mixed micelles with TX100. Therefore, addition of the anionic surfactant, SDS, moved the silica particles from top phase to the interface or bottom phase. On the other hand, DTAB, a cationic surfactant, attracted the particles to the top phase in the pH range form 4 to 11, where in the DTAB-free system the solids either stayed at the interface or in the bottom phase.

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