Effect of high-viscosity interphases on drainage between hydrophilic surfaces.

Feibelman, Peter Julian

Sandia National Laboratories

关键词: Navier-Stokes Equations;    Surfaces;    Interfaces;    Drainage;    37 Inorganic, Organic, Physical And Analytical Chemistry;   

DOI  :  10.2172/920121
RP-ID  :  SAND2004-5256
RP-ID  :  AC04-94AL85000
RP-ID  :  920121

美国|英语

来源: UNT Digital Library

【 摘 要 】

Drainage of water from the region between an advancing probe tip and a flat sample is reconsidered under the assumption that the tip and sample surfaces are both coated by a thin water 'interphase' (of width {approx}a few nm) whose viscosity is much higher than the bulk liquid's. A formula derived by solving the Navier-Stokes equations allows one to extract an interphase viscosity of {approx}59 KPa-sec (or {approx}6.6x10{sup 7} times the viscosity of bulk water at 25C) from Interfacial Force Microscope measurements with both tip and sample functionalized hydrophilic by OH-terminated tri(ethylene glycol) undecylthiol, self-assembled monolayers.