The influence of nanobubbles on the interaction forces between alumina particles and ceramic foam filters
| Autor: | Lisa Ditscherlein, Paul Knüpfer, Urs A. Peuker |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Ceramic foam
Materials science Interaction forces Bridging (networking) Capillary action General Chemical Engineering 02 engineering and technology Adhesion 021001 nanoscience & nanotechnology Condensed Matter::Soft Condensed Matter Physics::Fluid Dynamics 020401 chemical engineering Wetting 0204 chemical engineering Composite material 0210 nano-technology |
| Zdroj: | Powder Technology. 357:408-416 |
| ISSN: | 0032-5910 |
| DOI: | 10.1016/j.powtec.2019.08.077 |
| Popis: | With decreasing wettability and rough surfaces the adhesion forces between the interacting surfaces shift to higher values. This is due to capillary bridging by nanobubbles which are sitting on one or both rough surfaces and cause capillary interactions. For particles, the coverage with such bubbles for different wettability and gas oversaturation is shown. Also, it is possible to identify three general types of force distance curves: curves with no capillary interactions, curves with capillary interactions but no repulsion during approach and curves with capillary interactions and a small repulsion just before snap-in. Possible reasons for repulsion are analysed and a calculation of Hamaker constants is presented. Furthermore, well-known models for adhesion on rough surfaces are compared with the experimental data. |
| Databáze: | OpenAIRE |
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