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Rheological properties of montmorillonite dispersions in dilute NaCl concentration investigated by ultrasonic spinning rheometry

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Title: Rheological properties of montmorillonite dispersions in dilute NaCl concentration investigated by ultrasonic spinning rheometry
Authors: Yoshida, T. Browse this author
Tasaka, Y. Browse this author →KAKEN DB
Tanaka, S. Browse this author
Park, H.J. Browse this author
Murai, Y. Browse this author →KAKEN DB
Keywords: Ultrasound
Shear banding
Shear-thinning viscosity
Issue Date: 1-Sep-2018
Publisher: Elsevier
Journal Title: Applied Clay Science
Volume: 161
Start Page: 513
End Page: 523
Publisher DOI: 10.1016/j.clay.2018.05.017
Abstract: Rheological changes of gelled montmorillonite dispersions with different NaCl concentrations and alkali conditions were evaluated by ultrasonic spinning rheometry. It uses velocity-profile information that is obtained in an open-cylindrical container under periodic oscillations. The measurement was conducted with a focus on the rheological behavior at a low shear rate O(1 s−1), which is difficult to measure because of shear banding. The rheometry represents the coexistence of gel and sol conditions in dispersions as profiles of the phase lag of oscillations that are propagated from the cylinder wall. The critical shear rate at a yielding point and the onset of shear-thinning behavior was quantified, which has been regarded as only an apparent or speculated value by many previous researchers. Viscoelasticity from particle networks in the dispersion was observed, and the networks deform like a spring, without breaking the structure under low-shear-rate conditions.
Rights: © 2018. This manuscript version is made available under the CC-BY-NC-ND 4.0 license
Type: article (author version)
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 田坂 裕司

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