Supercritical CO2-induced atomistic lubrication for water flow in a rough hydrophilic nanochannel
| Autor: | Yifeng Wang, Louise J. Criscenti, Tuan A. Ho, Craig M. Tenney, Anastasia G. Ilgen |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Supercritical carbon dioxide Water flow 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Supercritical fluid 0104 chemical sciences Molecular dynamics Chemical physics Lubrication Fluid dynamics General Materials Science Wetting Lubricant 0210 nano-technology |
| Zdroj: | Nanoscale. 10:19957-19963 |
| ISSN: | 2040-3372 2040-3364 |
| DOI: | 10.1039/c8nr06204h |
| Popis: | A fluid flow in a nanochannel highly depends on the wettability of the channel surface to the fluid. The permeability of the nanochannel is usually very low, largely due to the adhesion of fluid at the solid interfaces. Using molecular dynamics (MD) simulations, we demonstrate that the flow of water in a nanochannel with rough hydrophilic surfaces can be significantly enhanced by the presence of a thin layer of supercritical carbon dioxide (scCO2) at the water-solid interfaces. The thin scCO2 layer acts like an atomistic lubricant that transforms a hydrophilic interface into a super-hydrophobic one and triggers a transition from a stick- to- a slip boundary condition for a nanoscale flow. This work provides an atomistic insight into multicomponent interactions in nanochannels and illustrates that such interactions can be manipulated, if needed, to increase the throughput and energy efficiency of nanofluidic systems. |
| Databáze: | OpenAIRE |
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