NDLI: Study of a shear thickening fluid: the dispersions of silica nanoparticles in 1-butyl-3-methylimidazolium tetrafluoroborate

Content Provider	Springer Nature Link
Author	Qin, Jianbin Zhang, Guangcheng Shi, Xuetao Tao, Min
Copyright Year	2015
Abstract	The dispersions was prepared by dispersing hydrophilic silica nanoparticles with an average diameter of 50 nm in 1-butyl-methylimidazolium tetrafluoroborate ([C$_{4}$mim][BF$_{4}$]), and investigated under the steady shear and oscillatory shear, respectively. Experimental results indicate that all of the dispersions present shear thinning, notable shear thickening, and shear thinning successively with increasing shear rate; the shear thickening behavior is derived from silica nanoparticle clusters and strongly controlled by silica nanoparticle content and temperature. The shear thickening fluid (STF) exhibits reversible property and transient response ability, and the time of transient response is no more than 100 ms. The conductivity of the STF is increased with increasing silica nanoparticle content, and the conductivity of 27 wt% dispersions is even two times as big as that of pure [C$_{4}$mim][BF$_{4}$]. The dispersions with high solid content dilate and present a phase transition changing from a liquid-like to a solid-like soft material in the shear thickening region. A theoretical model is developed to imitate the mechanism of shear thickening in the dispersions.
Starting Page	1
Ending Page	13
Page Count	13
File Format	PDF
ISSN	13880764
Journal	Journal of Nanoparticle Research
Volume Number	17
Issue Number	8
e-ISSN	1572896X
Language	English
Publisher	Springer Netherlands
Publisher Date	2015-08-13
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Dispersions Shear thickening Shear thinning 1-butyl-methylimidazolium tetrafluoroborate Silica nanoparticle Clusters Colloids Nanotechnology Inorganic Chemistry Characterization and Evaluation of Materials Physical Chemistry Optics, Optoelectronics, Plasmonics and Optical Devices
Content Type	Text
Resource Type	Article
Subject	Chemistry Nanoscience and Nanotechnology Atomic and Molecular Physics, and Optics Condensed Matter Physics Bioengineering Modeling and Simulation

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