Surface Properties and Solubility Enhancement of Anionic/Nonionic Surfactant Mixtures Based on Sulfonate Gemini Surfactants

Wu, Juan; Mei, Ping; Chen, Wu; Li, Zhongbao; Tian, Qingfeng; Mei, Qi‐Xiang

doi:10.1002/jsde.12335

Cited by 16 publications

(5 citation statements)

References 47 publications

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“…For the MES/APG of 1:0, the average diameter of the aggregates was 8.32 nm. This is because the anionic sulfonate headgroups of MES may strongly repel each other, leading to an enlarged curvature per headgroup, thus resulting in the micelle aggregation forming small-sized micelles . As the volume fraction of APG increased, the aggregate diameter increased to as high as 113.74 nm in the entry of MES/APG-7:1.…”

Section: Resultsmentioning

confidence: 99%

Recognizing Functional Groups of MES/APG Mixed Surfactants for Enhanced Solubilization toward Benzo[a]pyrene

Wu,

Liu,

Wang

et al. 2024

Environ. Sci. Technol.

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Benzo[a]pyrene is difficult to remove from soil due to its high octanol/water partition coefficient. The use of mixed surfactants can increase solubility but with the risk of secondary soil contamination, and the compounding mechanism is still unclear. This study introduced a new approach using environmentally friendly fatty acid methyl ester sulfonate (MES) and alkyl polyglucoside (APG) to solubilize benzo[a]pyrene. The best result was obtained when the ratio of MES/APG was 7:1 under 6 g/L total concentration, with an apparent solubility (S w ) of 8.58 mg/L and a molar solubilization ratio (MSR) of 1.31 for benzo[a]pyrene, which is comparable to that of Tween 80 (MSR, 0.95). The mechanism indicates that the hydroxyl groups (−OH) in APG form "O−H•••OSO 2 − " hydrogen bonding with the sulfonic acid group (−SO 3 − ) of MES, which reduces the electrostatic repulsion between MES molecules, thus facilitating the formation of large and stable micelles. Moreover, the strong solubilizing effect on benzo[a]pyrene should be ascribed to the low polarity of ester groups (−COOCH 3 ) in MES. Functional groups capable of forming hydrogen bonds and having low polarity are responsible for the enhanced solubilization of benzo[a]pyrene. This understanding helps choose suitable surfactants for the remediation of PAH-contaminated soils.

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Section: Resultsmentioning

confidence: 99%

Recognizing Functional Groups of MES/APG Mixed Surfactants for Enhanced Solubilization toward Benzo[a]pyrene

Wu,

Liu,

Wang

et al. 2024

Environ. Sci. Technol.

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“…The specific components are shown in Table 1, and the seven solutions are numbered as S#, A#, F#, SA#, SF#, AF#, SAF#. The concentrations of Capstone FS‐50, APG0810, and SLG used in the experiment were higher than their critical micelle concentrations (CMC) (0.0126% (Sheng, Xue, Zhang, et al, 2021), 2 mM (Wu et al, 2019), and 0.944 mM to 1.02 mM (Chen et al, 2007), respectively). The addition of salts into the solution can promote interfacial adsorption of surfactants (Kostakis et al, 2006; Ravera et al, 2006), and hence 1 mM NaCl was added into all the solutions.…”

Section: Methodsmentioning

confidence: 99%

Comparative study on foaming and foam stability of multiple mixed systems of fluorocarbon, hydrocarbon, and amino acid surfactants

Sheng

Zhang

Song³

et al. 2023

J Surfact & Detergents

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This study focuses on the effect of amino acid surfactant (sodium lauroyl glutamate [SLG]) on foam properties of a mixture of fluorocarbon (FS‐50) and hydrocarbon (APG0810) surfactants. The molecular interactions, foamability, and foam stability of the surfactant solutions are systematically studied. The results show that SLG has stronger ability to lower surface tension of water compared to APG0810, but worse that than FS‐50, and to adsorb onto gas/liquid interface in mixed solutions with FS‐50 compared to APG0810. The addition of SLG increased foamability of APG0810/FS‐50 mixed solution, and decelerated foam drainage and coarsening of individual APG0810, individual FS‐50, and mixture of APG0810/FS‐50 solutions. The mixture of SLG/FS‐50 exhibited the higher foamability and foam stability than the frequently used critical component of the new developed AFFF, the mixture of APG0810/FS‐50. This study can provide guidance for the scientific application of amino acid surfactants in the development of environmentally friendly firefighting foams.

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“…The molecular formulas of FS-50 and APG0810 are shown in Figure 10 . APG0810 and FS-50 are present in the mixed dispersions at concentrations exceeding their own critical micelle concentrations of 2 mM [ 54 ] and 0.0126% [ 55 ], respectively. The APG0810, FS-50, NaCl, and NPs are added into the container sequentially under magnetic stirring for 10 min between each addition.…”

Section: Methodsmentioning

confidence: 99%

Study on Thermal Stability of Gel Foam Co-Stabilized by Hydrophilic Silica Nanoparticles and Surfactants

Sheng

Peng

Zhang

et al. 2022

Gels

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The combination of nanoparticles (NP) and surfactant has been intensively studied to improve the thermal stability and optimize the performance of foams. This study focuses on the influence of silica NPs with different concentration on the thermal stability of gel foams based on a mixture of fluorocarbon (FS-50) and hydrocarbon (APG0810) surfactants. The surface activity, conductivity, viscosity, and foaming ability of the APG0810/FS-50/NPs dispersions are characterized. The effects of NP concentration on coarsening, drainage, and decay, as well as of the gel foams under thermal action, are systematically studied. Results show that NP concentration has a significant effect on the molecular interactions of the APG0810/FS-50/NP dispersions. The surface tension and conductivity of the dispersions decrease but the viscosity increases with the increase in NP concentration. The foaming ability of APG0810/FS-50 solution is reduced by the addition of NPs and decreases with the increase in NP concentration. The coarsening, drainage, and decay of the gel foams under thermal action slow down significantly with increasing NP concentration. The thermal stability of the gel foams increases with the addition of NPs and further increases with the increase in NP concentration. This study provides a theoretical guidance for the application for gel foams containing NPs and surfactants in fire-extinguishing agents.

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Surface Properties and Solubility Enhancement of Anionic/Nonionic Surfactant Mixtures Based on Sulfonate Gemini Surfactants

Cited by 16 publications

References 47 publications

Recognizing Functional Groups of MES/APG Mixed Surfactants for Enhanced Solubilization toward Benzo[a]pyrene

Recognizing Functional Groups of MES/APG Mixed Surfactants for Enhanced Solubilization toward Benzo[a]pyrene

Comparative study on foaming and foam stability of multiple mixed systems of fluorocarbon, hydrocarbon, and amino acid surfactants

Study on Thermal Stability of Gel Foam Co-Stabilized by Hydrophilic Silica Nanoparticles and Surfactants

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