Instability of Liquids in Flexible Fiber Brushes under Applied Pressure
| Autor: | Lei Jiang, Huan Liu, Masao Doi, Qing'an Meng, Tetsuya Yamamoto |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Materials science
Brush Nanotechnology 02 engineering and technology Surfaces and Interfaces Flexible fiber 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Instability Critical length 0104 chemical sciences law.invention Surface tension Volume (thermodynamics) law Bending stiffness Electrochemistry General Materials Science Composite material 0210 nano-technology Spectroscopy |
| Zdroj: | Langmuir. 32:3262-3268 |
| ISSN: | 1520-5827 0743-7463 |
| DOI: | 10.1021/acs.langmuir.6b00030 |
| Popis: | We theoretically predict the stability of liquid in a model brush made of flexible fibers for cases in which liquid is supplied from an ink reservoir. The volume of the liquid in the brush increases with increasing applied pressure by the reservoir, and the liquid shows instability at a critical pressure. When the fibers are shorter than a critical length, the end of the brush opens continuously with increasing applied pressure. The volume of the liquid that hangs from the open end of the brush increases with increasing applied pressure, and the liquid drops from the brush at the critical pressure, where the weight of the liquid becomes larger than the surface tension. In contrast, when the fibers are longer than the critical length, the end of the brush opens discontinuously to the maximal extent at the critical pressure. The discontinuous unbuckling is driven by the instability arising from the fact that the bending stiffness of the water surface, which bends together with the flexible fibers, decreases as the end of the brush opens, and it is thus a unique feature of brushes of flexible fibers. |
| Databáze: | OpenAIRE |
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