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Extraction and Characterization of Surfactants from Atmospheric Aerosols
Published on: April 21, 2017
Aggregation behavior in mixed system of double-chained anionic surfactant with single-chained nonionic surfactant in
Yanru Fan1, Meiwen Cao, Guangcui Yuan
1Key Laboratory of Colloid and Interface Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, People's Republic of China. yilinwang@iccas.ac.cn
Journal of Colloid and Interface Science
|March 21, 2006
Summary
Mixed surfactants, sodium bis(2-ethylhexyl) sulfosuccinate (AOT) and pentaethylene glycol mono-n-dodecyl ether (C12E5), form distinct aggregates. The SBPBS-C12E5 system exhibits superior pyrene solubilization compared to AOT-C12E5.
Area of Science:
- Colloid and Surface Chemistry
- Materials Science
- Physical Chemistry
Background:
- Surfactant aggregation is crucial for various applications, including drug delivery and detergency.
- Understanding mixed surfactant systems provides insights into complex interfacial phenomena.
- Anionic (AOT, SBPBS) and nonionic (C12E5) surfactants exhibit unique aggregation behaviors.
Purpose of the Study:
- To investigate the aggregation behavior of mixed surfactant systems: AOT/C12E5 and SBPBS/C12E5.
- To characterize critical aggregation concentrations, aggregate morphology, and solubilization capacity.
- To compare the formation of mixed vesicles and pyrene solubilization between the two systems.
Main Methods:
- Steady-state fluorescence spectroscopy
- Electrical conductivity measurements
- Dynamic light scattering (DLS)
- Transmission electron microscopy (TEM)
- Electrophoretic light scattering (ELS)
- Pyrene solubilization assays
Main Results:
- Two critical concentrations for aggregation were observed in both mixed surfactant systems.
- AOT-C12E5 mixtures favored the formation of mixed vesicles at higher C12E5 mole fractions.
- The SBPBS-C12E5 system demonstrated a greater solubilization capacity for pyrene compared to the AOT-C12E5 system.
Conclusions:
- Mixed surfactants exhibit complex aggregation behaviors, forming distinct aggregate structures.
- The choice of surfactant structure (AOT vs. SBPBS) influences aggregate morphology and solubilization efficiency.
- These findings contribute to the design of tailored surfactant systems for specific applications.
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