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Synthesis and electrorheological properties of polar molecule-dominated TiO 2 particles with high yield stress

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Abstract

Two types of amorphous TiO2 particles with different particle sizes were synthesized by a simple sol–gel method and were characterized by X-ray diffraction analysis, field emission scanning electron microscopy, and Fourier transform infrared spectrometry. The electrorheological (ER) results show that the TiO2/silicone oil suspensions exhibited a remarkable ER effect. The static shear stress can be up to 130 kPa (shear rate 0.2 s − 1) under the DC electric field of 4 kV/mm at room temperature. The polar molecules present on the particles’ surface play a decisive role for the observed giant ER effect, which arises from the alignment of polar molecules in the gap between neighboring particles.

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Acknowledgements

This work is funded by the National Basic Research Program of China (2009CB930801), the National Natural Science Foundation of China (10904155), the Knowledge Innovation Project of Chinese Academy of Sciences (KJCX2.YW.M07), and the Zhejiang Provincial Natural Science Foundation of China (D4080489). This study was also supported in part by Ningbo Natural Science Foundation (2008A610059, 2009A610031).

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Authors and Affiliations

  1. Division of Functional Materials and Nano Devices, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, China

    Xuehui Liu, Jianjun Guo, Yuchuan Cheng, Gaojie Xu, Yong Li & Ping Cui

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  1. Xuehui Liu
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  2. Jianjun Guo
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  3. Yuchuan Cheng
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  4. Gaojie Xu
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  5. Yong Li
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  6. Ping Cui
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Correspondence to Jianjun Guo.

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Liu, X., Guo, J., Cheng, Y. et al. Synthesis and electrorheological properties of polar molecule-dominated TiO 2 particles with high yield stress. Rheol Acta 49, 837–843 (2010). https://doi.org/10.1007/s00397-010-0452-y

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  • DOI: https://doi.org/10.1007/s00397-010-0452-y

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