Development and micro-gap flow evaluation of electro-rheological nano-suspensions |
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| Authors: | Katsufumi Tanaka Takanobu Hira Ryuichi Fukui Haruki Kobayashi Ryuichi Akiyama Masami Nakano Shouta Enami Atsushi Totsuka |
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| Institution: | 1. Department of Macromolecular Science and Engineering, Graduate School of Science and Technology, Kyoto Institute of Technology, Matsugasaki, Kyoto, 606-8585, Japan
2. Institute of Fluid Science, Tohoku University, Katahira, Sendai, 980-8577, Japan
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| Abstract: | Electro-rheological (ER) nano-suspensions based on titanium dioxide nano-particles with particle diameter on the order of 100 nm were prepared. Micro-gap flow behavior and microstructure were evaluated for the suspensions with a particle volume fraction of 8.8 vol%. For the nano-suspension based on a silicone oil, the ER effect and flow behavior were found to be stable during the sharing time on the order of 102?s. The ER response measured at a given strength of the electric field for the nano-suspension based on a chemically modified silicone oil was effectively induced by the electric field, especially with low strengths, and it was larger than that of the nano-suspension based on the silicone oil but slightly lower than that based on a hydrocarbon oil. Furthermore, the relaxation of the ER response after removal of the electric field was somewhat slow for the nano-suspension based on the hydrocarbon oil, whereas it was fairly well for the nano-suspension based on the modified silicone oil. |
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