耐低温水凝胶基防刺复合材料的制备及性能研究

Preparation and property study of low-temperature resistance hydrogel based anti-stabbing composite

为了提升柔性防刺材料的防护效果和智能化水平,通过将水凝胶与芳纶织物进行复合,制备了一种耐低温、抗穿刺且具备应变传感功能的芳纶/水凝胶复合材料,并对水凝胶及其复合材料在25℃和-30℃环境中的拉伸性能、纱线间摩擦性能和准静态钉刺性能进行表征。结果表明:当LiCl质量分数为26%时,经LiCl溶液浸泡后的水凝胶力学性能最佳,由于甘油和LiCl溶液的共同作用,水凝胶及其复合材料在-30℃时均能保持良好的柔韧性。复合材料中芳纶与水凝胶在25℃和-30℃时均呈现了良好的界面结合,最大拔出力相比纯芳纶织物分别提高了1281%和2315%。当环境温度为25℃和-30℃时,复合材料的最大抗穿刺力可达41.92 N和72.25 N,相较纯芳纶织物分别提升了187%和394%。该复合材料在25℃和-30℃下均可实现对于不同弯曲角度(80°、60°、40°和20°)、频率(0.5 Hz、1.0 Hz、1.5 Hz、2.0 Hz)以及弯曲循环500次的稳定传感。

In order to improve the protective effect and intelligent level of flexible anti-stabbing materials,aramid/hydrogel composite material with low temperature resistance,puncture resistance and strain sensing function was prepared by combining hydrogel with aramid fabric.The tensile property,friction property between yarns and quasi-static napping property of hydrogel and its composites were characterized at 25℃and-30℃.The results showed that the mechanical property of the hydrogel soaked in LiCl solution were the best when LiCl mass fraction was 26%.Due to the joint action of glycerol and LiCl solution,both the hydrogel and its composite could maintain better flexibility at-30℃.At both 25℃and-30℃,the aramid and hydrogel in composite mateirals showed better interface bonding,and the maximum pull-out force was increased by 1281%and 2315%compared with pure aramid fabric,respectively.When the temperature was 25℃and-30℃,the maximum puncture resistance of the composite material could be reached 41.92 N and 72.25 N,which were 187%and 394%higher than that of pure aramid fabric,respectively.The composite could achieve stable sensing at both 25℃and-30℃for different bending angles(80°,60°,40°and 20°),frequency(0.5 Hz,1.0 Hz,1.5 Hz,2.0 Hz)and 500 bending cycles.