Journal
DEFENCE SCIENCE JOURNAL
Volume 64, Issue 3, Pages 236-243Publisher
DEFENCE SCIENTIFIC INFORMATION DOCUMENTATION CENTRE
DOI: 10.14429/dsj.64.7322
Keywords
Kevlar; impact resistance; scanning electron microscope; shear thickening fluid; silane coupling agent
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Great interest has aroused in developing high impact resistant fabrics based on the incorporation of a shear thickening fluid (STF) into high performance fabrics (Kevlar). This work developed a shear thickening fluid enhanced fabrics and the influence of the shear thickening fluid types against spike impact and the impact resistance performance were investigated. Silica nano-particle impregnated Kevlar fabrics exhibit significantly enhanced ballistic performance while retaining flexibility. It was found that fabrics impregnated with functionalized nanoparticles offer multiple resistance to the penetration of a sharp impactor. The improvement in protection is traced by the formation of siloxane bonds during functionalization. It exhibits significant improvement in shear stiffness and a slight increase in tensile stiffness. The impact strength properties of all samples were tested using impact testing and quasi-static testing apparatuses. Chemical compositions and microscopic structures were analyzed with Fourier transform infrared spectroscopy and scanning electron microscopy. The current study clearly displays a significant enhancement in penetration resistance of Kevlar fabric impregnated with different combination of STF's.
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