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Experimental Study on Synthesis of Shear Thickening Fluid

Mohammad Kamil, Abu Mustafa Khan, S. J.A. Rizvi

Abstract


A novel class of nanosuspension material called shear thickening fluids (STFs) are created by dispersing micro- and nanoparticles in a dispersant. It is an intelligent material with excellent performance. When a modest shear rate is used, STFs are easily distorted. A material with noticeably improved characteristics is produced by this mixture (STF) of flowable and rigid components at a certain composition. Silica nanoparticles dispersed in a liquid polymer solution were exposed to ultrasonic in the current experiment to create the shear thickening fluid (STF) (polyethylene glycol,PEG). The low volatility, thermal stability, and ease of availability of polyethylene glycol made it the solvent of choice. Additionally, the index of refraction of polyethylene glycol is close to that of the silica particles, providing enhanced colloidal stability. STF produced in the laboratory consists of 40 wt. % silica nanoparticles and polyethylene glycol (PEG 400). It was synthesized using fumed silica with particles of 14 nm size by ultra-sonication mixing method. The prepared STFs have been tested for their rheological properties. Dynamic properties of the STF were studied using MCR-101 Anton Parr Rheometer. The change in viscosity was measured with the changing shear rate. It was observed that after a critical shear rate, viscosity increases drastically. The synthesized shear thickening fluid was found to be quite stable at ambient conditions


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