纳米氧化锆和氧化硅混合体系剪切增稠液的流变性能

doi:10.11896/cldb.18050019

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Abstract As a novel nano-composite materials, shear thickening fluid (STF) is composed of micro- and nano-particles distributed in a certain dispersant. When the external energy forces its shear rate to exceed a certain value, STF shows a nonlinear instant increase in viscosity and exhibits excellent energy dissipation capacity. Therefore, it can exert the effects of buffering and damping, which is able to be applied in energy absorption field. In this study, the ultrasonic technology and mechanical stirring were employed to prepare shear thickening fluid systems with various mass ratios of ZrO₂ and SiO₂. The microscopic characteristics of nano-SiO₂, nano-ZrO₂, and ZrO₂/SiO₂ powders were examined by scanning electron microscope, X-ray diffraction and energy dispersive spectrometer. Subsequently, the influence of the ZrO₂ mass ratio on the steady and unsteady rheological properties of nano-ZrO₂/SiO₂-STF was investigated by rotating rheometer. The microscopic study results indicated that there was a significant agglomeration effect of ZrO₂/SiO₂ powder. The rheology tests showed that the ZrO₂/SiO₂-STF system exhibited notable shear thickening and thinning behaviors, nevertheless, these two behaviors were not enhanced by increasing mass of ZrO₂ as the diffe-rent influence mechanism of the particles. It could be found from the further study that ZrO₂/SiO₂-STF system was endowed with the best properties with the nano-ZrO₂ mass ratio of 12%. The system not only presented obvious shear thinning behavior, but also possessed a relatively low critical shear thickening rate and a large peak apparent viscosity. Accordingly, the ZrO₂/SiO₂-STF is able to provide more effective time-varying damping and stiffness for adaptive structures.

Key words： shear thickening fluid zirconium dioxide silicon dioxide storage modulus consumption modulus

Published: 31 May 2019

CLC number:

O613.7

Fund:This work was financially supported by the National Natural Science Foundation of China (51578347, 51608335) and Postdoctoral Science Foundation (2016M591432).

About author:: Minghai Wei,a postdoctoral fellow of Dalian University of Technology and an associate professor of Shenyang Jianzhu University. He received his Ph.D. degree in structural engineering from the Harbin Institute of Technology (HIT) in Sep. 2008—Jul. 2012. He was selected for the “top-notch young talent program of Xingliao Yincai” of Liaoning province in 2018. He has published 14 journal papers searched by SCI as the first author and corresponding author, and authorized 6 national invention patents. His research interests focus on the smart materials and control. He has presided over the National Natural Science Foundation and China Postdoctoral Science Foundation.Li Sunis a professor and doctoral supervisor of Shen-yang Jianzhu University. He graduated from Dalian University of Technology in March 2006 with a doctorate degree in disaster prevention and mitigation enginee-ring. She performed collaborative research on 2008—2009 in Hong Kong Polytechnic University as a visiting scholar, and on 2012—2013 in Nanyang Polytechnic University, Singapore, as a visiting professor. She was selected as the “100 people level” of Liaoning Provinces million talents project in 2013. She has published more than 100 academic papers, and 46 of them by SCI and 56 of them by EI. She also has published two monographs and edited one book. In addition, a total of 14 national, provincial and ministerial prizes for scientific and technological progress were awarded.

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Cite this article:

WEI Minghai,SUN Li,ZHANG Chunwei, et al. Rheological Properties of Shear Thickening Fluid of Zirconia and SilicaNanoparticles Mixed System[J]. Materials Reports, 2019, 33(12): 1969-1974.

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http://www.mater-rep.com/EN/10.11896/cldb.18050019 OR http://www.mater-rep.com/EN/Y2019/V33/I12/1969

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