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Simultaneous viscosity and density measurement of small volumes of liquids using a vibrating microcantilever

Payam, A.F.; Trewby, W; Voïtchovsky, K.

Simultaneous viscosity and density measurement of small volumes of liquids using a vibrating microcantilever Thumbnail


Authors

A.F. Payam

W Trewby



Abstract

Many industrial and technological applications require precise determination of the viscosity and density of liquids. Such measurements can be time consuming and often require sampling substantial amounts of the liquid. These problems can partly be overcome with the use of microcantilevers but most existing methods depend on the specific geometry and properties of the cantilever, which renders simple, accurate measurement difficult. Here we present a new approach able to simultaneously quantify both the density and the viscosity of microliters of liquids. The method, based solely on the measurement of two characteristic frequencies of an immersed microcantilever, is completely independent of the choice of cantilever. We derive analytical expressions for the liquid’s density and viscosity and validate our approach with several simple liquids and different cantilevers. Application of our model to non-Newtonian fluids shows that the calculated viscosities are remarkably robust when compared to measurements obtained from a standard rheometer. However, the results become increasingly dependant on cantilever geometry as the frequency-dependent nature of the liquid’s viscosity becomes more significant.

Citation

Payam, A., Trewby, W., & Voïtchovsky, K. (2017). Simultaneous viscosity and density measurement of small volumes of liquids using a vibrating microcantilever. Analyst, 142(9), 1492-1498. https://doi.org/10.1039/c6an02674e

Journal Article Type Article
Acceptance Date Mar 18, 2017
Online Publication Date Mar 20, 2017
Publication Date May 7, 2017
Deposit Date Mar 20, 2017
Publicly Available Date Mar 29, 2024
Journal Analyst
Print ISSN 0003-2654
Electronic ISSN 1364-5528
Publisher Royal Society of Chemistry
Peer Reviewed Peer Reviewed
Volume 142
Issue 9
Pages 1492-1498
DOI https://doi.org/10.1039/c6an02674e

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Copyright Statement
This Open Access Article is licensed under a
Creative Commons Attribution 3.0 Unported Licence






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