Abstract
A low-cost electrorheological (ER) material made of micro/nano-structured montmorillonite/titania particles was prepared by a one-pot solvothermal method. The micro/nano-structured particles were characterized by X-ray diffraction, Fourier transform infrared spectra, and scanning electron microscopy. It was found that the nanorod-like titania assembled on the surface of montmorillonite, the diameters of the nanorods were about 30 nm, and the lengths were about 300 nm. The electrorheological property of the micro/nano-structured particles in silicone oil was measured under dc electric fields. It was found that the micro/nano-structured montmorillonite/titania ER fluid exhibited much stronger electrorheological effect compared to pure montmorillonite and pure titania nanorod ER fluids, while its leaking current density was significantly lower than that of montmorillonite ER fluid. The stronger electrorheological effect might be attributed to the larger interfacial polarization and interparticle friction, which originated from the unique structure and morphology of micro/nano-structured particles, compared to pure montmorillonite and pure titania nanorods.
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The authors would like to acknowledge the support from the Natural Science Foundation of China (nos. 60778042 and 50602036)
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Xiang, L., Zhao, X. & Yin, J. Micro/nano-structured montmorillonite/titania particles with high electrorheological activity. Rheol Acta 50, 87–95 (2011). https://doi.org/10.1007/s00397-010-0516-z
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DOI: https://doi.org/10.1007/s00397-010-0516-z