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Effect of carrier liquid on electrorheological performance and stability of oxalate group-modified TiO2 suspensions

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Abstract

By using oxalate group-modified TiO2 nanoparticles as the dispersing phase, different kinds of silicone oil with various viscosities and terminal groups (hydroxyl, hydrogen, and methyl) were used as the dispersing media to prepare different electrorheological (ER) fluids. Their zero-field viscosity, yield stress under direct current electric fields, ER efficiency, shear stability, leakage current density, and sedimentation stability were tested to study the effect of carrier liquid on the properties of ER fluids. The results indicate that the zero-field viscosity, the yield stress, and the leakage current density increase with increasing viscosity of the silicone oils. The effects of the viscosity on the ER efficiency, the shear stability, and the sedimentation ratio depend on the competition between the viscous resistance and the aggregation of the particles. Among the three ER fluids prepared with silicone oil with different terminal groups, hydroxyl-terminated oil based sample has the highest zero-field viscosity, the highest field-induced yield stress and ER efficiency, the largest current density, and the best sedimentation stability.

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Authors and Affiliations

  1. School of Civil Engineering, Dalian University of Technology, Dalian, 116024, China

    Ning Ma  (马宁)

  2. School of Materials Science and Engineering, Dalian University of Technology, Dalian, 116024, China

    Xufeng Dong  (董旭峰)

Authors
  1. Ning Ma  (马宁)
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  2. Xufeng Dong  (董旭峰)
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Correspondence to Xufeng Dong  (董旭峰).

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Funded by the National Natural Science Foundation of China (51478088)

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Ma, N., Dong, X. Effect of carrier liquid on electrorheological performance and stability of oxalate group-modified TiO2 suspensions. J. Wuhan Univ. Technol.-Mat. Sci. Edit. 32, 854–861 (2017). https://doi.org/10.1007/s11595-017-1679-6

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  • DOI: https://doi.org/10.1007/s11595-017-1679-6

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