Abstract
Shear thickening fluids (STFs) treated Kevlar fabrics have been widely used to fabricate the flexible body armors and the STFs can be subjected to a variable temperature in many service environments. Therefore, the rheological properties of the STFs prepared by dispersing monodisperse polystyrene (PS) microspheres in polyethylene glycol 200 (PEG200) were investigated at the temperature from −15 °C to 35 °C and the inter-yarns frictional properties of neat and STFs-treated Kevlar fabrics were investigated for six different pull-out speeds at −15 °C and 25 °C to evaluate the contribution of the STFs treatments. The STFs effectively improved the inter-yarns friction and the trigger of shear thickening in STFs-treated fabrics was achieved in some specific speed which was about 50 mm/min for PS/PEG200-based STFs-treated Kevlar fabrics at −15 °C. The improvement of friction caused by the microspheres among the yarns and filaments was demonstrated to be the main reason for the enhancement of the STFs-treated fabrics.
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