Viscosity change in aqueous hectorite suspension activated by DC electric field

The change in the viscosity of deionized aqueous hectorite suspensions by applying an electric field was investigated. The deionized suspensions had low viscosity, which was almost the same as that of its solvent, water. Upon applying a DC electric field of the order of a few volt per millimeter to...

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Bibliographic Details
Published in:Rheologica acta 2013-02, Vol.52 (2), p.139-144
Main Authors: Kimura, Hiroshi, Sugiyama, Taiki, Takahashi, Shinya, Tsuchida, Akira
Format: Article
Language:English
Subjects:
Characterization and Evaluation of Materials
Chemistry and Materials Science
Complex Fluids and Microfluidics
Deformation mechanisms
Deionization
Direct current
Electric fields
Food Science
Materials Science
Mechanical Engineering
Original Contribution
Polymer Sciences
Soft and Granular Matter
Viscosity
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Summary:The change in the viscosity of deionized aqueous hectorite suspensions by applying an electric field was investigated. The deionized suspensions had low viscosity, which was almost the same as that of its solvent, water. Upon applying a DC electric field of the order of a few volt per millimeter to the deionized suspension, the viscosity started to increase gradually and reached a constant value that was high enough relative to the original value. Regarding the mechanism of the electrically induced stress increase, it is highly plausible that a three-dimensional network structure formed under the electric field due to a deformation of the electrical double layer.
ISSN:0035-4511
1435-1528
DOI:10.1007/s00397-013-0682-x