Thermodynamics in Surfactant Solutions: Determination of the Micellization Enthalpy and Entropy of Alcohol/Surfactant Mixed Micelles. A Comparison of Calorimetric Methods with Temperature Differentiation of the ln Xcmc Values

Burrows, Jeffrey C.; Flynn, D. Justin; Kutay, S.M.; Leriche, Tammy G.; Marangoni, D. Gerrard

doi:10.1021/la00009a020

Cited by 28 publications

(26 citation statements)

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“…These variations in the CMC and the thermodynamic parameters are expected because it was demonstrated by previous works that the presence of an organic cosolvent alters dramatically the manner in which the surfactant self-assembles to form micelles [48][49][50][51][52]. Many research works reported that the solvent tends to interact with surfactant and may alter the structure of the micelle.…”

Section: Effect Of Propanediol-12 On the Micellization Of F127mentioning

confidence: 88%

A concise analysis of the effect of temperature and propanediol-1, 2 on Pluronic F127 micellization using isothermal titration microcalorimetry

Bouchemal

Agnely

Akpadza

et al. 2009

Journal of Colloid and Interface Science

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Section: Effect Of Propanediol-12 On the Micellization Of F127mentioning

confidence: 88%

A concise analysis of the effect of temperature and propanediol-1, 2 on Pluronic F127 micellization using isothermal titration microcalorimetry

Bouchemal

Agnely

Akpadza

et al. 2009

Journal of Colloid and Interface Science

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“…[1,2] The micellization of low-molecular weight surfactants is a thermodynamic process where the water structure around hydrophobic parts of the molecules plays a significant role. [1,[4][5][6][7][8] The driving force of micellization is related to the classical hydrophobic effect, based on the cohesive energy of water around hydrophobes, and where enthalpy and entropy contributions to water structuring compensate each other. [9] This is counterbalanced by electrostatic repulsion or interfacial tension, resulting in micelles with low dispersity in aggregation number.…”

Section: Introductionmentioning

confidence: 99%

Nonclassical Hydrophobic Effect in Micellization: Molecular Arrangement of Non‐Amphiphilic Structures

Uchman

Abrikosov

Lepšı́k

et al. 2017

Advcd Theory and Sims

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Micellization brought about by nonclassical hydrophobic effect invokes enthalpy as the driving force. Thus, the underlying molecular phenomena differ from the entropically dominated hydrophobic effect. In quest for a molecular-scale understanding, we report on the molecular arrangement of nonamphiphilic structures of an anionic boron cluster compound, COSAN. We synergistically combine experimental (NMR and calorimetry) and theoretical (molecular dynamics and quantum chemical calculations) approaches. The experimental data support the mechanism of closed association of COSAN, where the self-assembly is driven by the enthalpy contribution to the free energy. Molecular dynamics simulations in explicit solvent show that water molecules form a patchy network around COSAN molecules, giving rise to the strong hydrophobic self-association. In the second solvation shell, water forms a slightly hydrophilic "spot" close to the C-H segments of the cluster.

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“…However, as a function of increasing alcohol concentration, the enthalpic values obtained using two separate methods are not comparable [4]. Not all studies have focused on the use of SDS based surfactants, for example, in the same year results were published for other surfactants as a function of temperature, determining values for the CMC, ∆H mic , ∆G mic and ∆S mic [5].…”

Section: Introductionmentioning

confidence: 99%

Thermodynamics of micellisation: Sodium dodecyl sulfate/sodium deoxycholate with polyethylene glycol and model drugs

Waters

Hussain

Parkes

2014

The Journal of Chemical Thermodynamics

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Variations in the critical micelle concentration (CMC) have been determined for sodium dodecyl sulfate and sodium deoxycholate (NaDC) in the presence of five drugs and polyethylene glycol (PEG) at 298.2, 304.2 and 310.2 K. From these data, thermodynamic parameters associated with the micellisation process (∆G mic , ∆H mic and ∆S mic ) were calculated. In the presence of some drug-based compounds the CMC of SDS was affected, for example the presence of PEG dramatically reduced the CMC in all cases. Furthermore, PEG appeared to reduce the enthalpy of micellisation for all scenarios with only comparatively minor variations in the change in Gibbs free energy for the processes observed. For NaDC, the calorimetric results were far less predictable. A primary aggregation event recorded at a comparatively low concentration failed to appear for NaDC in the presence of a secondary compound, such as a drug or PEG. For NaDC, the presence of PEG had little effect on the CMC and corresponding thermodynamic data.

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Thermodynamics in Surfactant Solutions: Determination of the Micellization Enthalpy and Entropy of Alcohol/Surfactant Mixed Micelles. A Comparison of Calorimetric Methods with Temperature Differentiation of the ln Xcmc Values

Cited by 28 publications

References 0 publications

A concise analysis of the effect of temperature and propanediol-1, 2 on Pluronic F127 micellization using isothermal titration microcalorimetry

A concise analysis of the effect of temperature and propanediol-1, 2 on Pluronic F127 micellization using isothermal titration microcalorimetry

Nonclassical Hydrophobic Effect in Micellization: Molecular Arrangement of Non‐Amphiphilic Structures

Thermodynamics of micellisation: Sodium dodecyl sulfate/sodium deoxycholate with polyethylene glycol and model drugs

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