Knife-edge surface viscometers

Lifshutz, Norman; Hegde, Madhukar G; Slattery, John C.

doi:10.1016/0021-9797(71)90266-9

Cited by 32 publications

(2 citation statements)

References 10 publications

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“…Therefore, it was proposed to design the disc to resemble a knife-edge [10]. This idea was consistently achieved in the commercial module for a Physica MCR 300 rheometer [11] with bicone geometry with a small angle.…”

Section: Methods Of Shear Rheologymentioning

confidence: 99%

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Methods of measuring rheological properties of interfacial layers (Experimental methods of 2D rheology)

2009

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-Current methods of studying the rheological properties of interfacial layers at the interfaces of fluids are reviewed. This area of research includes two-dimensional 2D rheology. Regardless of the similarities between the parameters of rheological properties of two-dimensional and bulk (three-dimensional) systems, when measuring surface properties, it is necessary to reformulate the main experimental methods to allow for the different dimensions of surface and bulk characteristics of material. Parameters of shear and dilational (measured upon expansion-compression) properties of interfacial layers are distinguished, and the latter are considered to be independent parameters of a system. The most attention was given to the rotational methods of measuring shear viscosity and the components of the complex 2D elastic modulus, as well as to measuring surface tension upon harmonic changes of the bubble (droplet) surface area, which allows characteristics of the dilational behavior of thin liquid films to be determined. Both groups of methods are widely used in laboratory practice and realized in the form of a number of original and commercial instruments. Dilational measurements of interfacial layers can also be performed with oscillations of a movable barrier on a Langmuir trough. In addition, methods based on the propagation of capillary waves across the surface of a liquid, as well as rarer methods of capillary flow in thin channels forced by either a surface tension gradient or the motion of the interface, are considered.

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Section: Methods Of Shear Rheologymentioning

confidence: 99%

“…Moreover, as usual, η* is also defined through the real and imaginary components (10) where the real component (or simply η s ) is the surface dynamic viscosity which is determined via Eq. (7).The symbol "*" in the expressions cited above indicates that we deal with complex quantities composed of real and imaginary components.…”

Section: (6)mentioning

confidence: 99%

Methods of measuring rheological properties of interfacial layers (Experimental methods of 2D rheology)

2009

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Zweidimensionale Modellnetzwerke

Rehage

Veyssié

1990

Angewandte Chemie

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Two‐Dimensional Model Networks

Rehage

Veyssié

1990

Angew. Chem. Int. Ed. Engl.

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This article is concerned with the structure and dynamic properties of thin films that have been chemically stabilized by polymerization and cross-linking reactions. By using different types of monomers it is possible to construct networks with rubber-like elasticity or with glassy properties, or temporary networks, in the interfacial region between oil and water. The systematic study of these ultrathin membranes offers new insights into aspects of current research, and opens up a wide range of potential new applications.

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Knife-edge surface viscometers

Cited by 32 publications

References 10 publications

Methods of measuring rheological properties of interfacial layers (Experimental methods of 2D rheology)

Methods of measuring rheological properties of interfacial layers (Experimental methods of 2D rheology)

Zweidimensionale Modellnetzwerke

Two‐Dimensional Model Networks

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