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Viscosity measurement of industrial oils using the droplet quartz crystal microbalance.

Joyce, Malcolm J. and Ash, D and Barnes, C and Jeffries, A (2003) Viscosity measurement of industrial oils using the droplet quartz crystal microbalance. Measurement Science and Technology, 14 (11). pp. 1955-1962. ISSN 1361-6501

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Abstract

The application of the droplet quartz crystal microbalance (QCM) to the measurement of viscosity for industrial oils is reported. In this approach a small-volume droplet of fluid is investigated via its influence on the resonant frequency of a quartz oscillator. The droplet QCM viscosity response is investigated for a selection of industrial oils, including commercial automotive lubricants, heavy fuel oils, calibration oils and used automotive lubricating oils. This approach shows significant analytical promise for distinguishing between heavy fuel oils dyed to indicate their duty status. It is also demonstrated that lubricating oils aged in engine tests exhibit an enhanced QCM viscosity response than accepted viscosity measurements would otherwise indicate. The locus at which the viscosity response saturates due to violation of the small loading approximation (extreme viscosities) is identified and found to be qualitatively consistent with established equivalent circuit models. The identification of commercial lubricating oils is observed to be unreliable on the basis of viscosity response alone.

Item Type: Article
Journal or Publication Title: Measurement Science and Technology
Additional Information: This publication extends the research documented in an earlier pioneering article (in Langmuir) in an industrial context and is the first report of the Lancaster droplet technique applied to industrial oils, in collaboration with BNFL plc. and Castrol Technology (Adrian Jefferies: jeffera1@castrol.com, 0118 9765374). Interest has been expressed as a result of this publication directly to Prof. Joyce by academic groups in Japan and by a large multinational company, ICMFG Inc, based in Oklahoma (Darell Brehm, darellb@icmfg.com). RAE_import_type : Journal article RAE_uoa_type : General Engineering
Uncontrolled Keywords: droplet quartz crystal microbalance ; viscosity ; oils ; equivalent circuit models
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Departments: Faculty of Science and Technology > Engineering
ID Code: 2654
Deposited By: ep_importer
Deposited On: 27 Mar 2008 13:51
Refereed?: Yes
Published?: Published
Last Modified: 24 Jan 2014 05:16
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/2654

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