Role of matching water affinities between oppositely charged headgroups in the rheological properties of aqueous mixed cationic/anionic surfactant systems

Nan, Yan‐Qing; Xu, Haimei; Yang, Ning; Liu, Qian; Jia, Yun-Feng; Hao, Li-Sheng

doi:10.1016/j.colsurfa.2015.04.030

Cited by 14 publications

(6 citation statements)

References 49 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…That is, the ionic radius of HCO 3 − is greater than that of Cl − . Nan et al 39 found that the viscosity of the solution decreases with the increase of the anion radius. Therefore, the viscosity of CTAC/NaSal +CaCl 2 solution is greater than that of CTAC/NaSal +NaHCO 3 solution.…”

Section: Resultsmentioning

confidence: 99%

Effects of oilfield injection water component on rheological characteristics of CTAC/NaSal aqueous solution

Jing

Yuan

Yin

et al. 2020

Asia-Pacific J Chem Eng

View full text Add to dashboard Cite

The additive drag reduction technology has wide application and high economic value in drag reduction of oilfield water injection system. With CTAC/NaSal (cetyltrimethyl ammonium chloride/sodium salicylate) aqueous solution as the research object, this paper explores the effects of oilfield water component on its rheological characteristics under the experimental condition of 10–60°C, .1–1 000 s−1, and 0.01–0.21 wt %. The experimental results reveal that the oil cannot inhibit the formation of shear‐induced structure in the solution and strengthen the temperature resistance of the solution; NaHCO3 and CaCl2, two types of salts, have similar effects on rheological characteristics of the CTAC/NaSal solution. The solution viscosity increases first and then decreases with the increase of salt concentration. And the viscosity peak gradually moves to the left lower with the increase of temperature, which means that the salt tolerance of the solution decreases with the increase of temperature. Moreover, the Giesekus model has the best performance for describing the rheological characteristics of surfactant solutions. Within the experimental concentration range, the relative error is ±25%.

show abstract

Section: Resultsmentioning

confidence: 99%

Effects of oilfield injection water component on rheological characteristics of CTAC/NaSal aqueous solution

Jing

Yuan

Yin

et al. 2020

Asia-Pacific J Chem Eng

View full text Add to dashboard Cite

show abstract

“…The results indicate that the cmc of the ionic surfactant is significantly reduced with the addition of oppositely charged ionic surfactant, and the minimum of cmc is obtained at α 1 = 0.5 (i.e., equimolar ratio). According to the regular solution approximation developed by Rubingh, , the micellar composition x 1 m and the micellar interaction parameter β m for mixed micelles have been calculated with eqs and . The calculated β m values for the studied CTA + Br – /Na + AS – and CTA + Br – /Na + L – systems are shown in Figure .…”

Section: Resultsmentioning

confidence: 99%

“…In addition to surfactant ions and their constituent counterions, how does the degree of matching water affinities between oppositely charged headgroups or that between the oppositely charged counterions influence the micellar selfassembly and properties of aqueous mixed cationic/anionic surfactant systems with various counterions? Our previous work 27 indicated that the degree of matching water affinities between the oppositely charged headgroups is a key influencing factor for the self-assembly of wormlike micelles and the synergism in rheological properties: compared with the CTAB/SL/H 2 O system, the CTAB/AS/H 2 O system with the same counterions exhibits a much stronger synergistic effect on zero-shear viscosity η 0 and stronger ability in the formation and elongation of wormlike micelles. The oppositely charged headgroups AS − and CTA + are matched in water affinities, while the oppositely charged headgroups L − and CTA + are mismatched in water affinities.…”

Section: ■ Introductionmentioning

confidence: 99%

Mixed Micellization of Cationic/Anionic Surfactants: Role of Matching Water Affinities between Oppositely Charged Headgroups and That between Oppositely Charged Constituent Counterions

et al. 2019

Self Cite

View full text Add to dashboard Cite

To explore the role of matching water affinities between the oppositely charged headgroups, the micellization of cetyltrimethylammonium bromide (CTA+Br–)/sodium dodecanoate (Na+L–) mixed system and the CTA+Br–/sodium dodecylsulfonate (Na+AS–) mixed system has been investigated by the surface tension method and molecular dynamic (MD) simulation. In comparison with the CTA+Br–/Na+L– system, the CTA+Br–/Na+AS– system shows stronger micelle formation ability, smaller critical micelle concentration (cmc), and stronger synergistic effect arising from the higher degree of matching water affinities between the headgroups CTA+ and AS–. To explore the role of matching water affinities between the oppositely charged constituent counterions, the micellization of CTA+X–/Y+L– mixed systems with various counterions has been investigated. The higher degree of matching water affinities between counterions X– and Y+ and the higher degree of mismatching water affinities between headgroups and counterions are unfavorable to the screening effect of counterions on the electrostatic attraction between headgroups CTA+ and L–, leading to stronger micelle formation ability and smaller cmc and vice versa. MD simulation results also indicate that, for the mixed micellization of cationic/anionic surfactants, the role of matching water affinities between oppositely charged headgroups is more important than that between oppositely charged constituent counterions.

show abstract

“…However, when the concentration of 1631 was 0.3%, a significant increase in the droplet diameter of nanoemulsions was observed. It can be attributed to the gradual addition of the oppositely charged ionic surfactant caused the systems containing more or less precipitate or floc form near equimolar composition [27]. The stability of nanoemulsions after storage for 4 weeks at room temperature showed that when the concentration of 1631 was 0.2% and 0.3%, the particle size was increased significantly.…”

Section: Particle Size and Stability Of Nanoemulsionsmentioning

confidence: 97%

Effect of Oil Type, Aliphatic Alcohol, and Ionic Surfactants on the Formation and Stability of Ceramide-2 Enriched Nanoemulsions

Tian

Guo²,

Zhang

2015

Journal of Dispersion Science and Technology

View full text Add to dashboard Cite

Oil-in-water nanoemulsions are finding increasing use as delivery systems to encapsulate lipophilic bioactive components in personal care and pharmaceutical. The aim of this study was to optimize the composition and stability of ceramide-2 nanoemulsions. The nanoemulsions were prepared by high pressure homogenizer emulsification method using sodium dilauramidoglutamide lysine (DLGL) as surfactant. Results showed that the oil type and concentration had an appreciable impact on the particle size and stability of the ceramide-2 enriched nanoemulsions. The presence of the aliphatic alcohol altered the curvature of the surfactant molecular and increased the stability of nanoemulsions. The zeta potential of nanoemulsions decreased with the addition of Cetyl trimethyl ammonium Chloride (1631), which weakens the electrostatic interactions between droplets and lowers the stability of the nanoemulsions. The particle size decreased with increasing concentrations of both sodium dodecyl sulfate (SDS) and Cocoamidopropyl Betaine (CAB). The variation of zeta potential with SDS and CAB was insignificant, which was attributed to the high zeta potential value resulted from anionic gemini surfactant DLGL. Downloaded by [University of Nebraska, Lincoln] at 22:58 26 August 2015 2The instability mechanism of nanoemulsions was the Ostwald ripening. This study demonstrated that the addition of aliphatic alcohol, SDS or CAB was beneficial to the stability of ceramide-2 nanoemulsions and decreased the Ostwald ripening rate.

show abstract

Role of matching water affinities between oppositely charged headgroups in the rheological properties of aqueous mixed cationic/anionic surfactant systems

Cited by 14 publications

References 49 publications

Effects of oilfield injection water component on rheological characteristics of CTAC/NaSal aqueous solution

Effects of oilfield injection water component on rheological characteristics of CTAC/NaSal aqueous solution

Mixed Micellization of Cationic/Anionic Surfactants: Role of Matching Water Affinities between Oppositely Charged Headgroups and That between Oppositely Charged Constituent Counterions

Effect of Oil Type, Aliphatic Alcohol, and Ionic Surfactants on the Formation and Stability of Ceramide-2 Enriched Nanoemulsions

Contact Info

Product

Resources

About