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Deepti Tanjore and Christopher R. Daubert
A vane-in-cup approach to measure viscoelastic properties of gelatin gels through torque-time responses from Brookfield YR-I viscometer
Appl. Rheol. 21:6 (2011) 63172 (11 pages)
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Viscoelastic properties are traditionally measured using sophisticated instrumentation, and the high cost of
these rheometers may limit utility. This research attempts to enable viscometers that can provide a torque-time
response, with vane attachment and a recommended cup size, to measure viscoelastic properties. Phase angles
and shear moduli of model systems (gelatin and polyacrylamide gels) were calculated using torque-time
response and deformation zone concept. The methods were applied to data obtained from Brookfield YR-I viscometer
and the calculated values were compared with the data obtained from oscillatory testing on a stress
controlled rheometer. The methods were improved in several areas by testing different cup sizes, rotational
speeds, and viscometers and correcting torque-time responses to obtain most accurate results possible. The
developed method, along with the torque-time response obtained from the viscometer, was capable of measuring
viscoelastic parameters for the tested materials and further development could design a new quality control
device directed towards viscoelastic property measurement.
► Cite this publication as follows:
Tanjore D, Daubert CR: A vane-in-cup approach to measure viscoelastic properties of gelatin gels through torque-time responses from Brookfield YR-I viscometer, Appl. Rheol. 21 (2011) 63172.
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