剪切增稠流体增强尼龙纤维织物的防刺性能

Stab-resistance of shear thickening fluid enhanced nylon fabrics

研究了SiO2/PEG剪切增稠流体对尼龙纤维织物防刺性能的影响。研究结果表明,固相体积分数为10%的SiO2/PEG 400分散体系,具有典型的剪切增稠特性。经过SiO2/PEG 400剪切增稠流体处理的复合防刺纤维织物的防刺性能优于普通尼龙纤维织物。对纤维织物的显微损伤机制的研究表明,剪切增稠流体使尼龙纤维实现强化粘合,阻止纤维在高能量冲击下产生偏移,从而在纤维之间呈现高效率的能量转移。此类复合防刺纤维织物可用于制造穿着更舒适、防护性能更强的防刺服。

The stab resistance of shear thickening fluid(STF)-treated nylon fabrics was investigated.It is found that the SiO2/PEG 400 dispersion with the solid loading of 10vol% is a typical shear thickening fluid and STF-treated nylon has an improvement in resistance of impact energy compared to neat nylon.Studies on the microstructure of the material damage mechanism indicate that nylon fibres adheres to each other by STF addition while impacted by knife,which reduces the mobility of filaments and yarns in the impact zone,and the impact energy transfers through fibres at a high speed.These results indicate that these novel materials can be used to fabricate flexible body armors that provide improved protection against stab threats.