Giant electrorheological fluids with ultrahigh electrorheological efficiency based on a micro/nano hybrid calcium titanyl oxalate composite

作者：Jinghua Wu, Zhenyang Song, Fenghua Liu, Jianjun Guo, Yuchuan Cheng, Shengqian Ma, Gaojie Xu · 发表于：NPG Asia Materials · 年份：2016 · DOI：10.1038/am.2016.158 · 被引用次数：46 · 研究领域：Vibration Control and Rheological Fluids、Seismic Performance and Analysis

A novel micro/nanoparticle hybrid calcium titanyl oxalate electrorheological (ER) material composed of micron-sized spindly particles and nanometer-sized irregular particles was successfully fabricated. The giant ER fluid based on the composite exhibits enhanced not only yield stress but also low field-off viscosity, thereby resulting in an ultrahigh ER efficiency that greatly exceeds that of any existing giant ER (GER) material. The synergistic effect between the spindly microparticles and irregular nanoparticles discovered in this study suggests a promising method for solving the long-standing ER efficiency problems. Moreover, the one-step synthesis approach presented in this work can be readily expanded for mass production of other GER materials in practical applications. A material that can alternate between a low-viscosity fluid and a strong solid has been developed by researchers in China and the USA. Applying an electric field to an electrorheological fluid transforms it from a fluid to nearly solid state, and removing the field changes it back to a fluid; but the application of a small stress can irreversibly deform such materials. Yuchuan Cheng, Shengqian Ma and co-workers from the Ningbo Institute of Materials Technology & Engineering and the University of South Florida have used a simple one-step process to synthesize a composite electrorheological material that has a high yield strength. The composite contains spindly microparticles, which ensure a low viscosity w...