3D-printed capillary circuits for calibration-free viscosity measurement of Newtonian and non-Newtonian fluidsopen access
- Authors
- Oh, Sein; Choi, Sung young
- Issue Date
- Jun-2018
- Publisher
- MDPI AG
- Keywords
- viscometer; 3D printing; capillary circuit; microfluidics; Newtonian fluid; non-Newtonian fluid
- Citation
- MICROMACHINES, v.9, no.7, pp.1 - 11
- Indexed
- SCIE
SCOPUS
- Journal Title
- MICROMACHINES
- Volume
- 9
- Number
- 7
- Start Page
- 1
- End Page
- 11
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/149833
- DOI
- 10.3390/mi9070314
- ISSN
- 2072666X
- Abstract
- Measuring viscosity is important for the quality assurance of liquid products, as well as for monitoring the viscosity of clinical fluids as a potential hemodynamic biomarker. However, conventional viscometers and their microfluidic counterparts typically rely on bulky and expensive equipment, and lack the ability for rapid and field-deployable viscosity analysis. To address these challenges, we describe 3D-printed capillary circuits (3D-CCs) for equipment- and calibration-free viscosity measurement of Newtonian and non-Newtonian fluids. A syringe, modified with an air chamber serving as a pressure buffer, generates and maintains a set pressure to drive the pressure-driven flows of test fluids through the 3D-CCs. The graduated fluidic chambers of the 3D-CCs serve as a flow meter, enabling simple measurement of the flow rates of the test fluids flowing through the 3D-CCs, which is readable with the naked eye. The viscosities of the test fluids can be simply calculated from the measured flow rates under a set pressure condition without the need for peripheral equipment and calibration. We demonstrate the multiplexing capability of the 3D-CC platform by simultaneously measuring different Newtonian-fluid samples. Further, we demonstrate that the shear-rate dependence of the viscosity of a non-Newtonian fluid can be analyzed simultaneously under various shear-rate conditions with the 3D-CC platform.
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