Abstract: Monodisperse concentrated suspensions of different concentrationon were prepared with St(O)ber method and centrifugation/solvent exchange procedure. The rheology behavior and the stab resistance of Kevlar fabrics impregnated with each concentration were studied. The results show that when the mass percent of prepared suspension is lower than 50%, suspension shows weak shear thickening behavior, which viscosity increases and critical shear rate reduces with increasing concentration; when it is about 55%, suspension shows shear thickening at first and then transfer to shear thining; when it is bigger than 65%, shear thinning comes first and then appears obviously shear thickening stab resistance of impregnated Kevlar fabrics improves at some extent, which is 1.66 times than that of pure Kevlar.

Key words: stab resistants;STFs;armor protective materials