Abstract：
Currently, multifunction has become an essential direction of personal protective equipment (PPE), but achieving the protective effect, flexibility, physiological comfort, and intelligent application of PPE simultaneously is still a challenge. Herein, inspired by the meso-structure of rhinoceros skin, a novel strategy is proposed by compounding an ammonium sulfate ((NH4)2SO4) solution soaked gelatin hydrogel with the high weight fraction and vertically interwoven Kevlar fibers to manufacture a flexible and wearable composite with enhanced puncture resistance and strain-sensing properties. After (NH4)2SO4 solution immersion, the hydrogel\'s tensile strength, toughness, and fracture strain were up to 3.77 MPa, 4.26 MJ/m3, and 305.19%, respectively, indicating superior mechanical properties. The Kevlar/hydrogel composites revealed excellent puncture resistance (quasi-static of 132.06 N and dynamic of 295.05 N), flexibility (138.13 mN/cm), and air and moisture permeability (17.83 mm/s and 2092.73 g m-2 day-1), demonstrating a favorable balance between the protective effect and wearing comfort even after 7 days of environmental exposure. Meanwhile, salt solution immersion endowed the composite with excellent strain-sensing properties at various bending angles (30-90°) and frequencies (0.25-1 Hz) and allowed it to monitor different human motions directly in real-time. The rhinoceros-skin-inspired Kevlar/hydrogel composites provide a simple and economical solution for antipuncture materials that combine high protective effects, a comfortable wearing experience, and good strain-sensing properties, promising multifunctional PPE in the future.
摘要：
目前,多功能已经成为个人防护装备(PPE)的重要方向，但是达到保护效果，灵活性,生理舒适，同时PPE的智能应用仍然是一个挑战。在这里，灵感来自犀牛皮肤的细观结构，通过将硫酸铵（（NH4）2SO4）溶液浸泡的明胶水凝胶与高重量分数和垂直交织的Kevlar纤维混合，提出了一种新策略，以制造具有增强的抗穿刺性和应变传感性能的柔性和可穿戴复合材料。（NH4）2SO4溶液浸泡后，水凝胶的拉伸强度，韧性,断裂应变高达3.77兆帕，4.26MJ/m3,305.19%,分别,表明优越的机械性能。Kevlar/水凝胶复合材料显示出优异的抗穿刺性（准静态为132.06N，动态为295.05N），柔韧性（138.13mN/cm），空气和透湿性(17.83mm/s和2092.73gm-2day-1)，即使在7天的环境暴露后，也能在保护效果和穿着舒适性之间取得良好的平衡。同时,盐溶液浸泡使复合材料在各种弯曲角度（30-90°）和频率（0.25-1Hz）下具有出色的应变传感特性，并使其能够直接实时监测不同的人体运动。犀牛-皮肤启发的Kevlar/水凝胶复合材料为结合高保护作用的防穿刺材料提供了简单经济的解决方案，舒适的穿着体验，和良好的应变传感特性，未来有前途的多功能PPE。
