Synergisms in binary surfactant mixtures

Jošt, F.; Leiter, H.; Schwuger, M. J.

doi:10.1007/bf01420767

Cited by 62 publications

(56 citation statements)

References 12 publications

(13 reference statements)

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“…Mixtures of different surfactant types often exhibit synergism in their effects on the properties of the system (6)(7)(8)(9)(10)(11)(12)(13)(14). The observed synergism can be attributed to nonideal mixing effects in the aggregates, and results in substantially lower CMCs and interfacial tensions than would be expected based on the properties of the unmixed surfactants alone.…”

Section: General Description Of Mixed Surfactant Solutionsmentioning

confidence: 99%

“…The observed synergism can be attributed to nonideal mixing effects in the aggregates, and results in substantially lower CMCs and interfacial tensions than would be expected based on the properties of the unmixed surfactants alone. This situation has lead to both theoretical and practical interest in developing a quantitative understanding of the behavior of mixed surfactant systems, and can be exploited in applications such as detergency (14)(15)(16), enhanced oil recovery (17) and mineral flotation (18). We begin with the topic of mixed micelles, since monomer-micelle equilibrium exerts a key controlling influence on the behavior of the overall mixed surfactant system.…”

Section: General Description Of Mixed Surfactant Solutionsmentioning

confidence: 99%

“…Over the years, this binary nonideal mixed micelle model has been used to model a wide variety of different micellar solutions (9)(10)(11)(12)(19)(20)25,(96)(97)(98)(99), including situations as unusual as mixtures of cationic surfactants in concentrated sulfuric acid (99). The model has also been used as the basis for developing treatments of synergism in binary mixed systems (7)(8)(9)(10)(11)(12)(13)(14). A basic introduction to the form of this model is presented elsewhere in this volume (27).…”

Section: Modeling Mixed Micellar Systemsmentioning

confidence: 99%

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Mixed Surfactant Systems

Holland¹,

Rubingh

1992

Mixed Surfactant Systems

251

329

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The properties and behavior of mixed surfactant systems are discussed in the context of experimental techniques and modeling. The overview begins with a general description of mixed surfactant solutions, followed by a more detailed examination of mixed micelles, surfactant mixtures at interfaces, and the phase behavior of mixed systems. Topics include experimental measurements, approaches to modeling, nonideality, unusual surfactant types, micellar demixing, adsorption at various interfaces, chemical reactions in micelles, precipitation, cloud point phenomena and perspectives on the direction of future research on mixed surfactant systems.Mixed surfactant systems are encountered in nearly all practical applications of surfactants. These mixtures arise from several sources. First is the natural polydispersity of commercial surfactants which results from impurities in starting materials and variability in reaction products during their manufacture. These are less expensive to produce than isomerically pure surfactants and often provide better performance. Second is the deliberate formulation of mixtures of different surfactant types to exploit synergistic behavior in mixed systems or to provide qualitatively different types of performance in a single formulation (e.g. cleaning plus fabric softening). Finally, practical formulations often require the addition of surfactant additives to help control the physical properties of the product or improve its stability.

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Section: General Description Of Mixed Surfactant Solutionsmentioning

confidence: 99%

Section: General Description Of Mixed Surfactant Solutionsmentioning

confidence: 99%

Section: Modeling Mixed Micellar Systemsmentioning

confidence: 99%

See 1 more Smart Citation

Mixed Surfactant Systems

Holland¹,

Rubingh

1992

Mixed Surfactant Systems

251

329

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“…Mixtures of different surfactant types always found to have lowerCMCs and interfacial tensions than would be expected based on the properties of the pure surfactants. 22 This situation leads to an increase in both theoretical and practical interest in developing a quantitative understanding of mixed surfactant behavior, and couldbe exploited in applications such as detergency, 23 enhanced oil recovery 24 and mineral flotation. 25 However, it is found that the correlation between the ability of a surface-active compound to lower surface tension and its ability to prevent microbial adhesion.…”

Section: Resultsmentioning

confidence: 99%

Micellar Properties and Antimicrobial Activityof a Mixed Surfactant System Constituted by Sodium Dodecyl Sulfate and Cetylpyridinium Chloride

Taş¹,

Çete²

2017

IJPER

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Objective: Micellar properties of sodium dodecyl sulfate (NaDS) was examined in the presence of cetylpyridinium chloride (CPC) by means of surface tension, viscosity, dye solubilization, cloud point (CP) measurements.Antimicrobial activities of single and binary systems were also investigated. Results: A decrease in critical micelle concentration (CMC) and increase in solubilizing power for NaDS was observed with increasing CPC concentration. At the highest CPC concentration studied (0.1 M), the surface tension decreased up to 51 mN / m.Also, viscosity results showed growth in NaDS micelles (50 mM) up to the 0.1 M CPC concentration. Antimicrobial activity of NaDS, CPC and NaDS in presence of CPC was investigated against ten different strains of bacteria and ayeast which was not investigated up to now. The susceptibilities of the microorganism were determined by the agar diffusion method. The results showed that NaDS and CPC have a antimicrobial activity but NaDS in presence of CPC has not antimicrobial activity on the bacterial and yeast.

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“…Ми вважаємо, що на межі поділу фаз рідина-рідина вуглеводневі радикали молекул ПАР розташовані не зовсім перпендикулярно площині кордону розділу фаз, а переплі-таються між собою, що добре узгоджується з відомими літературними даними [13].…”

Section: рис 1 ізотерма поверхневого натягу нпав (1) та апав (2)unclassified