A stress-controlled shear cell for small-angle light scattering and microscopy.
Rev Sci Instrum
; 87(12): 123907, 2016 Dec.
Article
en En
| MEDLINE
| ID: mdl-28040951
ABSTRACT
We develop and test a stress-controlled, parallel plates shear cell that can be coupled to an optical microscope or a small angle light scattering setup, for simultaneous investigation of the rheological response and the microscopic structure of soft materials under an imposed shear stress. In order to minimize friction, the cell is based on an air bearing linear stage, the stress is applied through a contactless magnetic actuator, and the strain is measured through optical sensors. We discuss the contributions of inertia and of the small residual friction to the measured signal and demonstrate the performance of our device in both oscillating and step stress experiments on a variety of viscoelastic materials.
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1
Colección:
01-internacional
Banco de datos:
MEDLINE
Idioma:
En
Revista:
Rev Sci Instrum
Año:
2016
Tipo del documento:
Article
País de afiliación:
Francia