Electrorheological behavior of low filled suspensions of highly anisometric montmorillonite particles

• Published in: Journal of applied polymer science Vol. 136; no. 25
• Main Authors: Stolyarova, Dina Yu, Kuznetsov, Nikita M., Belousov, Sergey I., Chvalun, Sergei N.
• Format: Journal Article
• Language: English
• Published: Hoboken, USA John Wiley & Sons, Inc 05-07-2019; Wiley Subscription Services, Inc
• Subjects: clay; colloids; Computational fluid dynamics; Dependence; Elastic properties; Electric fields; Exfoliation; Fillers; Materials science; Montmorillonite; nanoparticles; nanowires and nanocrystals; Polydimethylsiloxane; Polymers; Rheological properties; rheology; Viscometry; X-ray diffraction; X‐ray
• ISSN: 0021-8995; 1097-4628
• DOI: 10.1002/app.47678

ABSTRACT
The electrorheological (ER) behavior of modified montmorillonite (MMT) suspensions in polydimethylsiloxane is studied. As established by rotational viscometry, the samples with a dispersed phase concentration from 1 to 8 wt % reveal viscous Newtonian behavior and dramatically change their properties to elastic when electric field is applied. The rheological characteristics of the suspensions over 0–7 kV mm−1 range of electric field strengths are also studied. Novel X‐ray diffraction method is developed to evaluate the suspension of the filler in a siloxane medium and to calculate the degree of its exfoliation. The dependence of exfoliation degree, dielectric, and ER characteristics on the type of modifier in the MMT structure is considered. Based on the obtained data, a new model of system behavior with the various types of fillers is proposed and the prospects of utilizing MMT as a filler for ER fluids are demonstrated. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47678.