The rheology of shear thickening fluids with various ceramic particle additives

Abstract

In this paper, shear thickening fluids (STFs) and three different types of additive particles such as silicon carbide, aluminum oxide and boron carbide are presented. STFs were fabricated based on nanosize fumed silica suspended in a liquid medium, polyethylene glycol at a constant concentration of 20 wt%, and then varying amounts of different types of particle additives were added. Their rheological properties under various temperatures were tested using a rheometer, and the effects of silica loading on the rheology of pure STF were investigated. The suspensions exhibited different systematic variations with respect to the varied parameters. AbstractIn this paper, shear thickening fluids (STFs) and three different types of additive particles such as silicon carbide, aluminum oxide and boron carbide are presented. STFs were fabricated based on nanosize fumed silica suspended in a liquid medium, polyethylene glycol at a constant concentration of 20wt%, and then varying amounts of different types of particle additives were added. Their rheological properties under various temperatures were tested using a rheometer, and the effects of silica loading on the rheology of pure STF were investigated. The suspensions exhibited different systematic variations with respect to the varied parameters.

Ballistic performance of Kevlar fabric impregnated with nanosilica/PEG shear thickening fluid

“…Beyond a critical point, contact forces generate force networks that dominate thickening where the hydrodynamic interactions are insufficient. Nanosilica loading plays an important role in contact rheology due to increase possibility of the contacted microstructure by increasing concentration particles in the suspension [58].…”

Functionalization of silica particles to tune the impact resistance of shear thickening fluid treated aramid fabrics

“…22,23 The rheological properties of STFs generally depend on the particle size, particle anisotropy, solid volume fraction, presence of additives, temperature etc. [24][25][26] Moreover, the rheological properties of STFs prepared from these silica particles can be tuned further by changing the particle-particle and particlemedia interactions. Wagner et al reported that when a polymer layer or brush is graed on a particle, the interactions between particles reduce, which ultimately causes the viscosity of the solution to drop depending on the thickness of the graed layer.…”

Electrical Properties of Magnetoactive Boron‐Organo‐Silicon Oxide Polymers

“…There are various theories to these ends including the jamming and percolation theories relevant to both magnetorheological fluids and polymer composites . The jamming theory has also been investigated specifically for shear thickening organo‐silicon oxide polymers . However, before the reader embarks upon an analysis of exotic theories, a closer look at the situation may reveal more.…”

“…[30] The jamming theory has also been investigated specifically for shear thickening organo-silicon oxide polymers. [31] However, before the reader embarks upon an analysis of exotic theories, a closer look at the situation may reveal more. Figure 4b illustrates the situation well.…”