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08:59
Determination of Aggregate Surface Morphology at the Interfacial Transition Zone ITZ
Published on: December 16, 2019
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Unique Interfacial Phenomena on Macroscopic and Colloidal Scales Induced by Two-Dimensional Phase Transitions
Hiroki Matsubara1, Makoto Aratono1
1Department of Chemistry, Faculty of Science , Kyushu University , Motooka 744 , Nishi-ku, Fukuoka 819-0395 , Japan.
Langmuir : the ACS Journal of Surfaces and Colloids
|June 22, 2018
Summary
This study explores interfacial phenomena like wetting transitions and droplet behavior using common cationic surfactants and alkanes. These observations provide insights into emulsion stability and film formation at interfaces.
Area of Science:
- Colloid and Surface Science
- Physical Chemistry
- Materials Science
Background:
- Interfacial phenomena govern numerous natural and industrial processes.
- Understanding these phenomena is crucial for applications in emulsions, foams, and coatings.
- Cationic surfactants and alkanes offer a versatile system for studying interfacial behavior.
Purpose of the Study:
- To investigate diverse macroscopic and colloidal interfacial phenomena.
- To demonstrate these phenomena using readily available cationic surfactants, alkanes, and water.
- To elucidate the mechanisms behind wetting transitions, droplet dynamics, and film formation.
Main Methods:
- Observation of interfacial phenomena using commercial cationic surfactants, liquid alkanes, and water.
- Characterization of wetting transitions of oil droplets.
- Analysis of droplet merging and splitting at air-water interfaces.
- Investigation of solid monolayer and bilayer formation in adsorbed films.
- Study of foam-film thickness switching and emulsion stability.
Main Results:
- Observed wetting transitions of oil droplets into molecularly thin films.
- Documented spontaneous merging and splitting of oil droplets at air-water interfaces.
- Identified solid monolayer and bilayer formation in mixed cationic surfactant/alkane films.
- Demonstrated switching of foam-film thickness.
- Assessed oil-in-water emulsion stability.
Conclusions:
- Diverse interfacial phenomena can be effectively studied using simple, commercial materials.
- The observed phenomena offer fundamental insights into surfactant-based interfacial systems.
- This work provides a foundation for further research in applied colloid and surface science.
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