Journal
CHEMISTRY OF MATERIALS
Volume 27, Issue 5, Pages 1792-1800Publisher
AMER CHEMICAL SOC
DOI: 10.1021/cm504652g
Keywords
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Funding
- Defense Advanced Research Projects Agency [N66001-11-1-4180, HR0011-13-C-0025]
- Office of Naval Research [N-000014-12-1-0962]
- Center for Nanoscale Systems (CNS), a member of the National Nanotechnology Infrastructure Network (NNIN)
- National Science Foundation under NSF [ECS-0335765]
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The stability and longevity of surface-stabilized lubricant layers is a critical question in their application as low- and nonfouling slippery surface treatments in both industry and medicine. Here, we investigate lubricant loss from surfaces under flow in water using both quantitative analysis and visualization, testing the effects of underlying surface type (nanostructured versus flat), as well as flow rate in the physiologically relevant range, lubricant type, and time. We find lubricant losses on the order of only ng/cm(2) in a closed system, indicating that these interfaces are relatively stable under the flow conditions tested. No notable differences emerged between surface type, flow rate, lubricant type, or time. However, exposure of the lubricant layers to an air/water interface did significantly increase the amount of lubricant removed from the surface, leading to disruption of the layer. These results may help in the development and design of materials using surface-immobilized lubricant interfaces for repellency under flow conditions.
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