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Extraction and Characterization of Surfactants from Atmospheric Aerosols
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Microcalorimetric Study of Some Short-Chain Nonionic Surfactants
1Federico II, Chemistry Department of Naples University, Via Mezzocannone 4, Napoli, 80134, Italy
Journal of Colloid and Interface Science
|December 16, 1998
Summary
Enthalpies of mixing and micellization were measured for various nonionic surfactants (CnEm) in water. These thermodynamic properties provide insights into surfactant behavior in aqueous solutions.
Area of Science:
- Physical Chemistry
- Solution Chemistry
Background:
- Surfactants are crucial in various industrial applications.
- Understanding their thermodynamic behavior in solution is essential for optimizing their use.
Purpose of the Study:
- To measure apparent enthalpies of mixing for nonionic surfactants (CnEm) in aqueous solutions.
- To determine the enthalpies of micellization from the experimental data.
Main Methods:
- Apparent enthalpies of mixing were measured using calorimetry.
- The study focused on surfactants with the general formula CH3-(CH2)n-1-(OCH2-CH2)mOH (CnEm).
- Measurements were conducted at 25 degrees Celsius.
Main Results:
- Experimental data on enthalpies of mixing were obtained for various CnEm surfactants.
- Enthalpies of micellization were successfully derived from the mixing data.
- The thermodynamic data provides a basis for discussing surfactant behavior.
Conclusions:
- The study successfully quantified the enthalpies of mixing and micellization for a series of nonionic surfactants.
- The obtained thermodynamic data contributes to the understanding of surfactant-solvent interactions and micelle formation.
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