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Key Words:Sulfur compounds;Dielectric relaxation - Electric fields - Electrorheological fluids - High-k dielectric - Layered semiconductors - Molybdenum compounds - Nanocomposites - Nanofluidics - Oil field development - Polarization - Rheology - Shells (structures) - Silicones - Titanium dioxide;Core shell structure - Electrorheological activities - Hierarchical composite - Hierarchical structures - Hydrothermal methods - Interfacial polarization - Polarization strength - Two-step hydrothermal method
Abstract:Flower-like TiO<inf>2</inf>@MoS<inf>2</inf>nanocomposite with a hierarchical and core@shell structure was synthesized using a two-step hydrothermal method, in which the flower-like Ti-containing precursor backbone was initially prepared to provide a large surface to enable the MoS<inf>2</inf>sheets to coat on TiO<inf>2</inf>uniformly. The glucose and acetate ion (Ac<sup>−1</sup>) were found to play a crucial role in the formation of the intimate interface between TiO<inf>2</inf>and MoS<inf>2</inf>. The hierarchical composite was dispersed in silicone oil as ER fluids at 10 wt%, which exhibited a high ER efficiency by combining the advantages of TiO<inf>2</inf>hierarchical structures and suitable conductivity of MoS<inf>2</inf>sheets. The high polarization strength and suitable dielectric relaxation of ER fluid was obtained under electric fields, which leaded to the improvement of interfacial polarization and ER activity.<br/> © 2018
Volume:349
Issue:
Translation or Not:no