In light of the significance of the viscoelastic property of agar to cell-based tissue engineering, this paper presents the stress relaxation measurement of agar using a polymer-based microfluidic device. Comprised of a single polymer rectangular microstructure and a set of electrolyte-enabled distributed transducers, this device is capable of detecting continuous distributed static and dynamic loads. In the measurement, an agar specimen is placed on the device and a rigid probe is utilized to press the specimen against the device with a step displacement input. Consequently, the stress relaxation behavior of the specimen translates to time-dependent continuous distributed loads acting on the device and is further registered as discrete resistance changes by the device. Two agar specimens of 1% and 3% in concentration, respectively, are measured using this device; and the data analysis is conducted on the measured results to extract Young’s relaxation modulus, which is further expressed by a Prony-series representation of the Maxwell model with two exponential terms. The results demonstrate the feasibility of using this device to measure the stress relaxation behavior of soft materials.
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ASME 2013 International Mechanical Engineering Congress and Exposition
November 15–21, 2013
San Diego, California, USA
Conference Sponsors:
- ASME
ISBN:
978-0-7918-5639-0
PROCEEDINGS PAPER
Stress Relaxation Measurement of Agar Using a Polymer-Based Microfluidic Device
Jiayue Shen,
Jiayue Shen
Old Dominion University, Norfolk, VA
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Peng Cheng,
Peng Cheng
Old Dominion University, Norfolk, VA
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Wenting Gu,
Wenting Gu
Old Dominion University, Norfolk, VA
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Michael Stacey,
Michael Stacey
Old Dominion University, Norfolk, VA
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Zhili Hao
Zhili Hao
Old Dominion University, Norfolk, VA
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Jiayue Shen
Old Dominion University, Norfolk, VA
Peng Cheng
Old Dominion University, Norfolk, VA
Wenting Gu
Old Dominion University, Norfolk, VA
Michael Stacey
Old Dominion University, Norfolk, VA
Zhili Hao
Old Dominion University, Norfolk, VA
Paper No:
IMECE2013-66054, V010T11A016; 9 pages
Published Online:
April 2, 2014
Citation
Shen, J, Cheng, P, Gu, W, Stacey, M, & Hao, Z. "Stress Relaxation Measurement of Agar Using a Polymer-Based Microfluidic Device." Proceedings of the ASME 2013 International Mechanical Engineering Congress and Exposition. Volume 10: Micro- and Nano-Systems Engineering and Packaging. San Diego, California, USA. November 15–21, 2013. V010T11A016. ASME. https://doi.org/10.1115/IMECE2013-66054
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