Abstract
Liquid viscosity measurement, especially the accurate detection of high-viscosity liquid, has been a hot research in biomedical, petrochemical, and other industries. In this article, a series resonant resistance response of quartz crystal microbalance (QCM) under the droplet model is introduced to characterize the density and viscosity of the liquid. The experimental results of water, glycerol solution with 50% water content, and pure glycerol show that the resonant resistance has a similar response to the resonant frequency and higher stability. Compared with the traditional method in which QCM contacts liquid on one side, this new method has the advantages of extremely high-quality factor, wide measurement range, and minimal reagent requirement, which has important guiding significance for the application of QCM in high-viscosity liquids.
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