Influence of ionic surfactants on the viscoelastic properties of zwitterionic surfactant solutions

Hoffmann, H.; Rauscher, Anna Á.; Gradzielski, Michael; Schulz, Susann

doi:10.1021/la00045a013

Cited by 103 publications

(77 citation statements)

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“…These results are analogous to the effects observed for single surfactantss the first case corresponding to the salt effect and the second to the concentration effect. Hoffmann et al 31 reported similar findings for mixtures of a zwitterionic surfactant with either a cationic or anionic surfactant. The data in the above studies were not analyzed using the Cates framework.…”

Section: Introductionmentioning

confidence: 69%

Microstructure and Dynamics of Wormlike Micellar Solutions Formed by Mixing Cationic and Anionic Surfactants

2000

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Small-angle neutron scattering (SANS) and rheology are used to probe the wormlike micelles formed in mixtures of a cationic (cetyl trimethylammonium tosylate, CTAT) and an anionic surfactant (sodium dodecyl benzene sulfonate, SDBS). For a fixed composition of 97/3 CTAT/SDBS, the zero-shear viscosity η 0 initially increases rapidly with surfactant concentration, but decreases beyond an intermediate concentration φ max . The solutions show a scattering peak in SANS and the height of the scattering peak also exhibits a maximum around φ max . These results are interpreted in terms of a maximum in the linear micellar contour length L h at φ max , and suggest that the hydrodynamic and electrostatic correlation lengths reach an optimal ratio at this point. For a fixed total surfactant concentration, the viscosity η 0 also reaches a maximum at an intermediate SDBS fraction. The decrease in η 0 at high SDBS fractions is interpreted in terms of the polyelectrolyte nature of the micelles and the increased chain flexibility caused by the rising ionic strength of the solutions. An alternate possibility may involve a progression from linear to branched micelles with increasing SDBS content.

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Section: Introductionmentioning

confidence: 69%

Microstructure and Dynamics of Wormlike Micellar Solutions Formed by Mixing Cationic and Anionic Surfactants

2000

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“…In these systems the formations of large rodlike micelles were reported at a relatively low total surfactant concentration [5]. Rosen and Zhu [20] explained the significant intermolecular attractions between anionic and betaine surfactants by the strong electrostatic attractions between them.…”

Section: Introductionmentioning

confidence: 97%

“…These properties are attributed to the existence of an entangled network of micelles [2,3]. Wormlike micelle are formed in a mixture of anionic/cationic [4] and anionic/zwitterionic surfactants [5].…”

Section: Introductionmentioning

confidence: 99%

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Rheology of wormlike micelles in mixed solutions of cocoamidopropyl betaine and sodium dodecylbenzenesulfonate

Różańska

2015

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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“…The driving force in this selfassembling process is the elimination of the contact between water and hydrophobic tail. Micelle generation can start at certain surfactant concentrations called critical micelle concentration (CMC) (Hoffmann et al 1992, Israelachvili 2011. Critical micelle concentration is determined by two opposing forces between the surfactant molecules; the repulsive forces between the polar head groups and the attractive forces between the hydrophobic tail groups.…”

Section: Viscoelastic Surfactantsmentioning

confidence: 99%

Rheological Study of a Novel Sulfobetaine Surfactant-Based Acid System

Çetin¹,

Nasr‐El‐Din

2017

SPE Middle East Oil &Amp; Gas Show and Conference

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Acid stimulation is a widely used well treatment technique applied to enhance oil production by creating conductive channels through the formation, resulting an improved flow property. Viscoelastic surfactant (VES)-based acids have been employed for acidizing jobs due to their ability to build up sufficient viscosity for acid diversion and fluid loss reduction, and to break into low viscosity after the treatment is completed. This work studied rheological properties of a new zwitterionic viscoelastic surfactant-based stimulation fluid. Impacts of many variables on the rheological characteristics of the VES-based live and spent acids were examined.Rheological experiments were conducted using a high pressure/high temperature (HPHT) viscometer. Viscosity measurements were performed between the temperatures of 78 to 350• F and shear rates of 10 to 935 s −1 at 300 psi. Examined acid additives included: corrosion inhibitor, formic acid, methanol, demulsifier, H 2 S scavenger, iron control agents, and mutual solvent. As a contaminant, the effect of Fe(III) was investigated. In addition, the impacts of surfactant concentration, salt type and salt concentration on the viscosity of the VES-based acid systems were tested.Experimental results indicated that the new VES-based acid system exhibits a sufficient viscosity for acid diversion at temperatures up to 270 This study showed that the new VES-based acid has the ability to build and maintain sufficient viscosity at higher temperatures than the currently used VES types. The acid system yielded higher tolerance to corrosion inhibitor than many other VES-based acids, and showed compatibility with a wide range of salt types.On the basis of the results obtained, optimum conditions to achieve the desired rheological profile for a successful well stimulation operation are presented.

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Influence of ionic surfactants on the viscoelastic properties of zwitterionic surfactant solutions

Cited by 103 publications

References 0 publications

Microstructure and Dynamics of Wormlike Micellar Solutions Formed by Mixing Cationic and Anionic Surfactants

Microstructure and Dynamics of Wormlike Micellar Solutions Formed by Mixing Cationic and Anionic Surfactants

Rheology of wormlike micelles in mixed solutions of cocoamidopropyl betaine and sodium dodecylbenzenesulfonate

Rheological Study of a Novel Sulfobetaine Surfactant-Based Acid System

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