Physicochemical and electrochemical methods for determination of critical micelle concentrations of surfactants: a comprehensive review

Mabrouk, Mokhtar M.; Hamed, Nouran A.; Mansour, Fotouh R.

doi:10.1007/s00706-022-02891-2

Cited by 30 publications

(7 citation statements)

References 98 publications

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“…By using these differences, responsive molecular probes can be designed to sensitively detect the formation of micelles, enabling the determination of the CMC and imaging of micelles. [31][32][33] In this review, the strategies of CMC measurement by means of fluorescent probes were classified into four main categories. A comprehensive summary of the design strategies and applicability of fluorescent probes is provided, which can help researchers in the fields of surfactants and aggregates to easily follow up and can also help scholars in non-related fields to get a quick overview.…”

Section: Introductionmentioning

confidence: 99%

Determination of the critical micelle concentration of surfactants using fluorescence strategies

Tian

Chen

et al. 2022

Soft Matter

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Section: Introductionmentioning

confidence: 99%

Determination of the critical micelle concentration of surfactants using fluorescence strategies

Tian

Chen

et al. 2022

Soft Matter

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“…The effect of aggregation in aqueous solutions is the formation of micelles. This concentration, called the critical micelle concentration (CMC), is a measure of micelle stability [6][7][8]. The CMC values estimated for the tested 2-EH derivatives based on the analysis of the course of experimentally determined surface tension isotherms are presented in Table 2.…”

Section: Adsorption Properties 221 Equilibrium Surface Tension Isothermsmentioning

confidence: 99%

“…where R (J/(mol•K)) is a gas constant, T (K) is the temperature of the system, and γ (mN/m) is the surface tension of the system [36]. The Szyszkowski isotherm, as shown in Equation ( 8), was applied to the experimental data of the surface tension as a function of the bulk concentration of the compound (Figure 10) [8].…”

Section: Diffusion Coefficientsmentioning

confidence: 99%

“…A sz describes a measure of the tendency toward interfacial adsorption, and B sz characterizes the orientation of the adsorbed molecule. The values of Γeq and Γ∞ of the considered system were determined using Equations ( 7) and (8). A novel approach proposed in this research for the approximation of adsorption dynamics is the use of cubic splines as an alternative to the power function commonly used in the literature.…”

Section: Diffusion Coefficientsmentioning

confidence: 99%

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Adsorption Properties and Wettability of Ethoxy- and Propoxy- Derivatives of 2-Ethylhexanol as Sterically Specific Surfactant Structures

Hreczuch,

Konopczyńska,

Stasiak

et al. 2024

Molecules

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2-ethylhexanol, an oxo alcohol competitively priced on the global market, has not been explored intensively as a raw material for surfactants, due to its weak hydrophobic character. However, its sequenced propoxylation and ethoxylation yield an innovative amphiphilic structure, which exhibits unique interfacial activity. The paper presents the differences in the fractional composition of innovative surfactants derived from 2-EH alcohol prepared using alkali and dimetalcyanide catalysts, as well as examples of excellent adsorption and interfacial properties of the latter. The adsorption behavior of the synthesized compounds was explored using equilibrium surface tension (the du Noüy ring method), dynamic surface tension (the maximum gas bubble pressure method) and static/dynamic contact angle (the sessile drop method). The results from the adsorption tests conducted at the air/aqueous surfactant solution interface underwent comprehensive qualitative and quantitative analyses. Moreover, based on the experimentally obtained dynamic surface tension isotherms and the developed algorithm, the diffusion coefficients for these preparations were estimated, and it was shown that the diffusivity of these surfactants is higher compared to the commercial formulations. The study’s outcomes in the testing of wettability indicate that new synthesized nonionic and anionic surfactants constitute an interesting group of amphiphiles with a wide application potential as effective wetting agents, especially in relation to the polymer surface. It should therefore be emphasized that the innovative surfactants described in this article, derived from 2-EH alcohol and prepared using dimetalcyanide catalysts, can successfully compete with conventional preparations such as ABS (Dodecylbenzenesulfonic Acid) or AES (Alcohol Ethoxysulphate) acid salts.

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“…have been reported. Several reviews on the determination of CMC using various methods have been published. , While all the existing protocols for estimating CMC have been shown to be equally reliable, each has its own advantages and limitations in terms of safety, ease of execution, feasibility, and cost factor and, most importantly, in unveiling the various mechanistic, kinetic, implied basic, and applied aspects of self-aggregation behavior of surfactants. Very recently, many innovative protocols for the estimation of CMC via the use of easily accessible and easy-to-operate instruments have been reported in the literature. − Alkawareek et al demonstrated the use of a USB digital microscope to capture the images of the droplets and, subsequently, used ImageJ software to measure the contact angle values of the droplets .…”

Section: Introductionmentioning

confidence: 99%

Smartphone-Assisted Contact Angle Measurements: A Simple Approach to Determine the Critical Micelle Concentration of Surfactants

Khan,

Wani,

Jan

et al. 2024

J. Chem. Educ.

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We present a simple smartphone-based protocol for the estimation of the critical micelle concentration (CMC) of surfactants. The protocol is based on contact angle measurements from the smartphone-captured images of differently concentrated surfactant solution droplets mounted over a naturally existing or chemically synthesized superhydrophobic surface. A scatter plot of contact angle vs surfactant concentration is constructed for the determination of CMC. The described laboratory experiment, besides providing a simple, reliable, safe, cost-effective, and reproducible method for the estimation of CMC, will provide students with a fresh perspective on many fundamental and practical aspects of superhydrophobic surfaces, solid/liquid interfaces, and the self-aggregation of amphiphilic molecules.

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Physicochemical and electrochemical methods for determination of critical micelle concentrations of surfactants: a comprehensive review

Cited by 30 publications

References 98 publications

Determination of the critical micelle concentration of surfactants using fluorescence strategies

Determination of the critical micelle concentration of surfactants using fluorescence strategies

Adsorption Properties and Wettability of Ethoxy- and Propoxy- Derivatives of 2-Ethylhexanol as Sterically Specific Surfactant Structures

Smartphone-Assisted Contact Angle Measurements: A Simple Approach to Determine the Critical Micelle Concentration of Surfactants

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