Diffusion-controlled adsorption kinetics of aqueous submicellar and micellar solution at air/solution interface in the limit of short time

Liu, Junji; Zhang, Ying

doi:10.1007/bf02705914

Cited by 7 publications

(3 citation statements)

References 17 publications

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“…Amphiphilic molecules such as surfactants, drugs, hydrotropes, and polymers self-associate in aqueous solution to form micelles or related structures above a certain concentration known as critical micelle concentration (CMC) [1][2][3][4][5][6][7]. These micelles are of widespread use in pharmaceutical applications besides food, detergency, cosmetic industries and enhanced oil recovery and range of applications [8].…”

Section: Introductionmentioning

confidence: 99%

Micellization behavior of mixtures of amphiphilic promazine hydrochloride and cationic aniline hydrochloride in aqueous and electrolyte solutions

Rub

Azum

Khan

et al. 2015

Korean J. Chem. Eng.

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We studied the influence of cationic hydrotrope aniline hydrochloride on the micellization behavior of cationic amphiphilic phenothiazine drug promazine hydrochloride in the presence and absence of 50 mmol kg −1 NaCl. The experimental critical micelle concentration (CMC) values came out to be lower than ideal CMC (CMC id ) values, signifying attractive interactions between the two components in mixed micelles. NaCl further decreases the CMC of pure PMZ and aniline hydrochloride as well as their mixture due to screening of the electrostatic repulsion among the polar head groups. The bulk properties of solution were examined by using different theoretical models for justification and comparison of results. The micellar mole fraction of aniline hydrochloride (X 1 Rub , X 1 M , X 1Rod and X 1 id ) was evaluated by different proposed models, showing greater contribution of hydrotrope in mixed micelle. The negative values of interaction parameter (β) indicate synergistic interactions and negative values of β further decrease by the addition of salt in mixed systems. From the CMC values as a function of temperature, various thermodynamic properties have been evaluated and discussed in detail.

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Section: Introductionmentioning

confidence: 99%

Micellization behavior of mixtures of amphiphilic promazine hydrochloride and cationic aniline hydrochloride in aqueous and electrolyte solutions

Rub

Azum

Khan

et al. 2015

Korean J. Chem. Eng.

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“…This unified enhancement behavior (Fig. 7 b) can be explained by the fact that and do not vary within an order of magnitude for many surfactants 20 , 41 . As a result, the dependence on molar concentration should be similar for many types of surfactants.…”

Section: Boiling Resultsmentioning

confidence: 84%

“… , , and are molecular properties that change with surfactant type (see Table S.2 , SI, for property values). However, both and do not vary within an order of magnitude for many surfactants 20 , 41 ; thus, given a particular surfactant, the diffusion time is almost solely dependent on the bulk concentration. From Eq.…”

Section: Boiling Resultsmentioning

confidence: 99%

How dynamic adsorption controls surfactant-enhanced boiling

Mata

Ortiz

Luhar

et al. 2022

Sci Rep

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Improving boiling is challenging due to the unpredictable nature of bubbles. One way to enhance boiling is with surfactants, which alter the solid–liquid and liquid–vapor interfaces. The conventional wisdom established by previous studies suggests that heat transfer enhancement is optimized near the critical micelle concentration (CMC), which is an equilibrium property that depends on surfactant type. However, these studies only tested a limited number of surfactants over small concentration ranges. Here, we test a larger variety of nonionic and anionic surfactants over the widest concentration range and find that a universal, optimal concentration range exists, irrespective of CMC. To explain this, we show that surfactant-enhanced boiling is controlled by two competing phenomena: (1) the dynamic adsorption of surfactants to the interfaces and (2) the increase in liquid dynamic viscosity at very high surfactant concentrations. This dynamic adsorption is time-limited by the millisecond-lifetime of bubbles on the boiling surface—much shorter than the timescales required to see equilibrium behaviors such as CMC. At very high concentrations, increased viscosity inhibits rapid bubble growth, reducing heat transfer. We combine the effects of adsorption and viscosity through a simple proportionality, providing a succinct and useful understanding of this enhancement behavior for boiling applications.

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Colour stability of lutein esters in liquid and spray dried delivery systems based on Quillaja saponins

Tippel

Reim

Rohn

et al. 2016

Food Research International

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Diffusion-controlled adsorption kinetics of aqueous submicellar and micellar solution at air/solution interface in the limit of short time

Cited by 7 publications

References 17 publications

Micellization behavior of mixtures of amphiphilic promazine hydrochloride and cationic aniline hydrochloride in aqueous and electrolyte solutions

Micellization behavior of mixtures of amphiphilic promazine hydrochloride and cationic aniline hydrochloride in aqueous and electrolyte solutions

How dynamic adsorption controls surfactant-enhanced boiling

Colour stability of lutein esters in liquid and spray dried delivery systems based on Quillaja saponins

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