Surface concentrations and molecular interactions in binary mixtures of surfactants

Rosen, Milton J.; Hua, Xi Yuan

doi:10.1016/0021-9797(82)90052-2

Cited by 405 publications

(323 citation statements)

References 6 publications

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“…3. The figure shows that one of the prepared polymers (PC 12 ) is amorphous while the polymers PC 6 and PC 10 give peak at 2-Theta equal to 19.835 degree with d-spacing (4.4726) and the peak intensity in case of PC 6 is higher than that of polymer PC 10 has a small portion of crystallinity which are also confirmed by the electron microscopic picture represented in Fig. 4 .…”

Section: The X-ray Diffraction Analysis and Electron Microscopysupporting

confidence: 67%

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Improvement of the Surface Activity and the Solubility for Some Synthesized Polyaniline Surfactants

2012

Egypt. J. Chem.

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OME monomeric surfactants namely, 3(6-sodium sulfonate hexacyloxy) aniline (MC 6 ), 3(10-sodium sulfonate decyloxy) aniline (MC 10 ) and 3(12-sodium sulfonate dodecyloxy) aniline (MC 12 ) and their analogous polymers were synthesized. Different techniques were used to characterize the synthesized monomeric and their analogous polymeric surfactants such as ultraviolet-visible (UV), thermal gravimetric analysis (TGA), X-ray and scanning electron microscopy (SEM) techniques. The surface tension technique was used to investigate the surface properties of these surfactants at different temperatures. The critical micelle concentration (CMC) results showed the improvement in the solubility of the synthesized polymeric surfactants according to the effect of the hydrophobic and hydrophilic moieties in their chemical structure. The surface parameters showed the ability of monomeric and their analogous polymeric surfactants for adsorption at the air / water interfaces and decreased the surface tension. The thermodynamic parameters revealed that the micellization process is spontaneous for all investigated surfactants as a result of the improvement of the solubility of these surfactants.Keywords: Monomeric and polymeric aniline surfactants, Solubility, Surface properties and Thermodynamic parameters.Polyaniline as an electrically conductive polymer has attracted considerable attention. Because of its excellent environmental stability in the electroconducting form, it has many potential applications; unique electrical and optical properties )1 ( . Conducting polymers are salts of inorganic acceptors and organic donors consisting of large, cyclically conjugated electron systems )2 ( . A common feature of conducting polymer is conjugation of π-electrons extending over the length of the polymer backbone. The applications of polyaniline have been limited due to its poor solubility )3 ( . Several studies have been done in order to improve the solubility of polyaniline, such as the polymerization of aniline derivatives. The most studied aniline derivatives are alkyl (4) , alkyloxy )5-6) , S

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Section: The X-ray Diffraction Analysis and Electron Microscopysupporting

confidence: 67%

“…3-(6-Bromohexayloxy) aniline, 3-(10-bromodecane) aniline and 3-(12-bromododecane) aniline were reacted with sodium sulfite to produce 3(6-sodium sulfonate hexacyloxy) aniline (MC 6 ), 3(10-sodium sulfonate decyloxy) aniline (MC 10 ) and 3(12-sodium sulfonate dodecyloxy) aniline (MC 12 ) .…”

Section: Synthesis Of Monomeric 3-alkyloxy Anilines Sodium Sulfonatementioning

confidence: 99%

Improvement of the Surface Activity and the Solubility for Some Synthesized Polyaniline Surfactants

2012

Egypt. J. Chem.

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“…Regular solution analysis on the basis of experimental surface tension data has suggested that the mixing of polyoxyethylene alkyl ether surfactants in aqueous solutions yields an ideal mixture, although negative interaction parameters are usually obtained in such systems 11 . For example, in earlier work by Rosen and Hua 11 , the mixtures of trioxyethylene dodecyl ether C 12 EO 3 and octaoxyethylene dodecyl ether C 12 EO 8 give the interaction parameter 0.39, which is negatively smaller than the values calculated for our systems.…”

Section: Resultsmentioning

confidence: 99%

Nonionic Surfactant Mixtures in an Imidazolium-Type Room-Temperature Ionic Liquid

et al. 2011

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INTRODUCTIONRoom-temperature ionic liquids RT-ILs are a relatively new class of organic solvents. Their unique physicochemical properties such as excellent thermal stability up to 300 or more, negligible volatility, and non-flammability make them ideal green solvents for many reactions of industrial importance. In the field of colloid and interface chemistry, RT-ILs have also received much attention 1, 2 . For example, a wide range of research papers on RT-ILs were reviewed and categorized by Inoue from the perspective of surfactant chemistry 3 . These categories comprised the following: i RT-ILs as a new type of surfactant, ii the effects of RT-ILs on the aqueous solution properties of surfactants, iii the formation of microemulsions using RT-ILs as polar solvents, and iv the self-assembly of surfactants in RT-ILs. Our interest lies in the fourth category 4, 5 . One of the key fi ndings we reported in a previous paper 4 is that phytosterol ethoxylates BPS-n, where n is an oxyethylene chain length of 5, 10, 20, and 30 exhibit excellent surface activity in an aprotic, imidazolium-type RT-IL 1-butyl-

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“…1) were analyzed by the NIBM model developed by Rosen et al [1,6,7]. According to this model, the composition of the adsorption layers for a two-component mixture can be determined by Eq.…”

Section: Nibm Model Of Rosenmentioning

confidence: 99%

“…According to [1][2][3][4]6,7] the molecular interaction parameters in binary surfactant mixtures could be determined from equilibrium surface tension isotherms by using the theory of nonideal interactions in binary surfactant mixtures (NIBM). Based on this theory, approaches for determination of the composition of mixed adsorption layers and mixed micelles were proposed in [1,8].…”

Section: Introductionmentioning

confidence: 99%

Composition of mixed adsorption layers and micelles in solutions of sodium dodecyl sulfate and dodecyl acid diethanol amide

Angarska¹,

Tachev²,

Denkov³

2004

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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The surface tension isotherms of dodecyl acid diethanole amide (DADA), sodium dodecyl sulfate (SDS) and their mixtures at different molar ratios are measured by the Wilhelmy-plate method. The isotherms are analyzed by the theory of nonideal interactions in binary surfactant mixtures (NIBM) and by the nonideal multicomponent mixed micelle model (NMMM). The molecular interaction parameters (MIP) on the interface, β S , and in the micelles, β M , are determined by the NIBM method. By using the Ingram's modification of this method, we calculate the compositions of the mixed adsorption layers and of the micelles, as functions of DADA and SDS concentrations both below and above the critical micelle concentration (CMC). It is shown that the DADA molecules prevail on the surface and in the micelles (>50%) at concentrations around CMC even when DADA presents a small fraction in the surfactant mixture (5 mol%). This result is explained by the much higher surface activity of DADA in comparison with SDS. At concentrations, which are about 1 order of magnitude above the CMC, the composition of the micelles approaches the composition of the total surfactant mixture. The composition of the surfactant adsorption layer also becomes much closer to the composition of the total surfactant mixture at concentrations well above the CMC. The results for the micelles composition at moderate and high molar fractions of DADA in the surfactant mixture (above 10 mol%), obtained by NMMM and by NIBM methods, agree well with each other. A discrepancy between the results obtained by these two models is found at low DADA fraction in the mixture, and this discrepancy is explained by the presence of traces of dodecanol (DOH) in the used SDS sample.

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Surface concentrations and molecular interactions in binary mixtures of surfactants

Cited by 405 publications

References 6 publications

Improvement of the Surface Activity and the Solubility for Some Synthesized Polyaniline Surfactants

Improvement of the Surface Activity and the Solubility for Some Synthesized Polyaniline Surfactants

Nonionic Surfactant Mixtures in an Imidazolium-Type Room-Temperature Ionic Liquid

Composition of mixed adsorption layers and micelles in solutions of sodium dodecyl sulfate and dodecyl acid diethanol amide

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