耐低温水凝胶基防刺复合材料的制备及性能研究OACSTPCD

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 1 281%and 2 315%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.