Explaining the growth behavior of surfactant micelles

Bergström, Magnus

doi:10.1016/j.jcis.2014.10.054

Cited by 30 publications

(25 citation statements)

References 60 publications

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“…15,16 By means of combining Eq. (2) with thermodynamics of self-assembly to form small systems the following relation has been deduced 15…”

Section: B the General Micelle Modelmentioning

confidence: 99%

“…In this way bending elasticity constants were estimated for two cationic surfactants (12, 6-Br and 12, 8-Br) previously studied with time-resolved fluorescence quenching (TRFQ), 31,32 mixed hexadecyltrimethyl ammonium bromide (CTAB)/sodium octyl sulfate (SOS) micelles studied with small-angle neutron scattering (SANS) 16 and two gemini esterquat surfactants (9E2Q-3-Q2E9 and 11E2Q-3-Q2E11) studied with SANS. 24 The results are summarized in Table I.…”

Section: A the Influence Of Bending Elasticity Constants On The Growmentioning

confidence: 99%

“…1,16 It has been demonstrated that CMC 2 can be rather accurately defined as the point where the aggregation number versus concentration curve switches from concave to convex behavior at the point of inflexion d 2 N/dc 2 = 0. 24 The existence of such a point of inflexion is predicted by the general micelle model (in agreement with experimental observations) but not by the conventional spherocylindrical micelle model.…”

Section: A the Influence Of Bending Elasticity Constants On The Growmentioning

confidence: 99%

“…14 In accordance, we have recently developed a novel theory (the general micelle model) from which it is possible to rationalize the growth behavior of surfactant micelles, including the rapid growth above a certain concentration usually referred to as the second critical micelle concentration (CMC 2 ). 15,16 According to the general micelle model, size, shape and growth behavior of micelles are primarily determined by the three bending elasticity constants spontaneous curvature, bending rigidity and saddle-splay constant. One obvious advantage of the bending elasticity approach is that it may account for the size of both ordinary micelles in a surfactant-solvent system and microemulsion droplets that form in presence of an additional solubilizate component.…”

Section: Introductionmentioning

confidence: 99%

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A theoretical investigation of the influence of the second critical micelle concentration on the solubilization capacity of surfactant micelles

Bergström

2018

AIP Advances

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The solubilization of hydrophobic components by surfactants that form microemulsion droplets has been investigated from a theoretical point of view. By means of combining thermodynamics of self-assembly to form small systems with bending elasticity theory, we have been able to demonstrate a strong correlation between the second critical micelle concentration (CMC 2 ) of surfactant micelles and their solubilization capacity (σ). The correlation may be rationalized as a consequence of all three bending elasticity constants spontaneous curvature (H 0 ), bending rigidity (k c ) and saddle-splay constant (k c ) showing similar trends with respect to the two quantities, i.e. σ increases and CMC 2 decreases with decreasing values of k c H 0 and increasing values of k c and k c , respectively. As a result, we demonstrate that the solubilization capacity is predicted to always be higher for a gemini surfactant with CMC 2 = 11 mM as compared with a gemini surfactant with CMC 2 = 18 mM. The predicted correlation between solubilization capacity and CMC 2 agrees with experimental observations showing that surfactants forming larger micelles in general have better solubilization capacity than surfactants forming smaller micelles. The theory also demonstrates, in agreement with experiments, that σ is raised in the entire range of surfactant concentrations, below as well as above CMC 2 , regardless of micelle size. Consequently, our theory predicts that small micelles formed below CMC 2 increase in size, whereas large rodlike or wormlike micelles formed above CMC 2 decrease in size, as a hydrophobic solubilizate is added to a micellar solution. © 2018 Author(s)

show abstract

“…15,16 By means of combining Eq. (2) with thermodynamics of self-assembly to form small systems the following relation has been deduced 15…”

Section: B the General Micelle Modelmentioning

confidence: 99%

Section: A the Influence Of Bending Elasticity Constants On The Growmentioning

confidence: 99%

Section: A the Influence Of Bending Elasticity Constants On The Growmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A theoretical investigation of the influence of the second critical micelle concentration on the solubilization capacity of surfactant micelles

Bergström

2018

AIP Advances

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show abstract

“…As a surfactant, it possesses a critical micelle concentration (CMC), this means that above this specific concentration micelles will form in solution [47][48]. Micelles are aggregates of surfactant particles and the micelle properties depend on the surfactant concentration as well as the surrounding medium [45].…”

Section: Synthesis Proceduresmentioning

confidence: 99%

Cobalt Ferrite Nanoparticles Fabricated via Co-precipitation in Air: Overview of Size Control and Magnetic Properties

Toledo¹

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A critical review on natural surfactants and their potential for sustainable mineral flotation

Oulkhir

Lyamlouli

Danouche

et al. 2022

Rev Environ Sci Biotechnol

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Explaining the growth behavior of surfactant micelles

Cited by 30 publications

References 60 publications

A theoretical investigation of the influence of the second critical micelle concentration on the solubilization capacity of surfactant micelles

A theoretical investigation of the influence of the second critical micelle concentration on the solubilization capacity of surfactant micelles

Cobalt Ferrite Nanoparticles Fabricated via Co-precipitation in Air: Overview of Size Control and Magnetic Properties

A critical review on natural surfactants and their potential for sustainable mineral flotation

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