System and method for interfacial rheometry

Details System and method for interfacial rheometry System and method for interfacial rheometry

2011-04-19

2011-04-19

Rogers, David A. (Department: 2856)

Measuring and testing

Liquid analysis or analysis of the suspension of solids in a...

Viscosity

C073S054230, C073S054310, C073S054370

Reexamination Certificate

active

07926326

ABSTRACT:
An apparatus and method for performing rheological measurements of interfaces located at the top of fluid sub-phases. In one configuration, a rotating rheometer is provided with a chamber wall whose inner surface defines an outer chamber radius and an inner cylinder disposed within the cylindrical chamber and having an inner chamber radius. The rotating rheometer is configured to hold a liquid sub-phase and interface layer that can be probed using a circular ribbon that is concentric with and suspended between the inner cylinder and chamber wall. The ratio of the ribbon radius, inner chamber radius, and outer chamber radius is designed to yield an average shear rate in the inner region that is the same as an average shear rate in the outer region. In one configuration, an interface-pinning feature is provided on at least one of the inner cylinder and the chamber wall.

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“A Trough With Radial Compression For Studies Of Monolayers and Fabrication Of Langmuir-Blodgett Films”, M. Matsumoto, Y. Tsujii, K-I. Nakamura and Y. Yoshimoto, Thin Solid Films 280 1,2 (1996) 238-243.

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