The influences of particle–particle interaction and viscosity of carrier fluid on characteristics of silica and calcium carbonate suspensions-coated Twaron® composite

Abstract

2015): The influences of particle-particle interaction and viscosity of carrier fluid on characteristics of silica and calcium carbonate suspensions-coated Twaron® composite, Journal of Experimental Nanoscience, ABSTRACTThe effects of particleÀparticle interaction and viscosity of carrier fluid on steady and dynamic rheological responses and quasi-static penetration resistance of Twaron® fabrics treated with shear thickening and shear thinning suspensions have been investigated. The suspensions have been made by mechanically dispersing 60 nm silica (SiO 2 ) and calcium carbonate (CaCO 3 ) nanoparticles in poly ethylene glycol (PEG) with molecular weights of 200 and 400 g/mol. The CaCO 3 suspensions display shear thinning behaviour along with the total dominance of the elastic state over the viscous state while the SiO 2 suspensions exhibit shear thickening behaviour with the emergence of both the elastic and viscous states. With the increase of molecular weight of PEG, viscosity, viscoelastic modules and instability of the suspensions increase and critical shear rate and frequency of transition to elastic state diminish. The PEG200 and PEG400-contained SiO 2 suspensions-treated Twaron® composites at 35 wt.% have quasi-static penetration resistances which are nearly 2.63 and 2.48 times and maximum absorbed energies which are about 1.54 and 1.55 times higher, respectively, than those of the corresponding CaCO 3 ones. However, the influence of increasing the PEG's molecular weight is not as considerable as the effect of particleÀparticle interaction on the enhancement of penetration resistance performance.

Fabric Composites Reinforced with Thermally Bonded and Irregularly Aligned Filaments: Preparation and Puncture Resistant Performance

“…As evidenced by previous studies, a combination of fabrics and STF can obtain highly strengthened stab-proof and bulletproof functions [11,12,13,14]. However, there are some studies that proved that it was the STF particles which increased the friction force between fabrics and yarns, thereby improving the stab resistance of the STF-based fabrics [15,16,17].…”

Shear behavior of a shear thickening fluid-impregnated aramid fabrics at high shear rate

“…Based on these fundamental considerations of STF, attempts have been made to design optimized soft fabric body armor using experimental studies including yarn pull-out test, bulletproof test, and conventional impact test [20,22,[34][35][36][37][38][39][40]. Finite element analysis was also carried out to analyse the mechanical behaviour of soft fabric body armor at high shear strain rate, which cannot be observed in experiment.…”

Determination of the Most Appropriate Rheological Model for Polyethylene Glycols and Fumed Silica Particle Mixtures

“…In the early researches, the viscosity mechanisms of STFs were examined and parameters that affect these mechanisms were tried to determine. The effects of particle shapes [4], particle hardness [5], polyethylene glycol [6], and temperature [7] on shear thickening behavior have been investigated in various studies. In the literature, PEG [8,9] and EG [10,11], were used as a liquid medium, spherical [12] and fumed silica [13,14] as solid particles in STFs produced using a wide variety of suspensions.…”