Supercritical CO2-induced atomistic lubrication for water flow in a rough hydrophilic nanochannel
[1];
[1];
[1];
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States). Geochemistry Department
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States). Nuclear Waste Disposal Research and Analysis Department
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States). Nuclear Incident Response Program Department
We report 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. Here, 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.
- Research Organization:
- Energy Frontier Research Centers (EFRC) (United States). Center for Frontiers of Subsurface Energy Security (CFSES); Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- AC04-94AL85000; NA0003525; SC0001114
- OSTI ID:
- 1483970
- Alternate ID(s):
- OSTI ID: 1478542
- Report Number(s):
- SAND-2018-11997J; NANOHL; 668932
- Journal Information:
- Nanoscale, Vol. 10, Issue 42; ISSN 2040-3364
- Publisher:
- Royal Society of ChemistryCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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