A miniaturized radial Langmuir trough for simultaneous dilatational deformation and interfacial microscopy
| Autor: | Joseph R. Samaniuk, Andrew J. Cope, Shalaka K. Kale, David M. Goggin |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Capillary action technology industry and agriculture Trough (geology) Modulus 02 engineering and technology Deformation (meteorology) 010402 general chemistry 021001 nanoscience & nanotechnology Microstructure Surface pressure 01 natural sciences 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Biomaterials Colloid and Surface Chemistry Rheology Microscopy lipids (amino acids peptides and proteins) Composite material 0210 nano-technology |
| Zdroj: | Journal of colloid and interface science. 582 |
| ISSN: | 1095-7103 |
| Popis: | Innovation Interfacial rheological properties of complex fluid-fluid interfaces are strongly influenced by the film microstructure. Experimental investigations for correlating interfacial morphology and rheology are notoriously challenging. A miniaturized radial Langmuir trough was developed to study complex fluid-fluid interfaces under purely dilatational deformations that operates in tandem with a conventional inverted microscope for simultaneous interfacial visualization. Experiments Two materials were investigated at an air-water interface: poly(tert-butyl methacrylate) (PtBMA) and dipalmitoylphosphatidylcholine (DPPC). Surface pressure measurements made in the radial Langmuir trough were compared with a commercial rectangular Langmuir trough. Interfacial in situ visualization for each material was performed during the compression cycle in the radial trough. Challenges associated with the small size of the radial Langmuir trough, such as the influence of capillary deformation on the measured surface pressure, are also quantified. Findings Measured surface pressures between the newly developed radial trough and the rectangular Langmuir trough compare well. Micrographs obtained in the radial Langmuir trough were used to obtain film properties such as Young’s modulus. The new advance in colloid and interface science is the ability to capture structure-property relationships of planar interfaces using microscopy and purely dilatational deformation. This will advance the development of constitutive modeling of complex fluid-fluid interfaces. |
| Databáze: | OpenAIRE |
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