MXene基罗纹针织物的制备及其应变传感性能

Preparation and strain sensing performance of MXene-based rib knitting fabric

摘要:

借鉴于染色工艺，采用轧烘焙技术制备了高弹性导电过渡金属碳化物/氮化物（MXene）改性罗纹针织物。通过SEM、电阻测试、传感性能测试等对复合织物进行结构和性能表征。结果显示，MXene改性罗纹针织物具有较好的弹性和弹性回复性，并且复合织物中MXene负载量随轧烘 焙循环次数的增加而增加，织物电阻随轧烘焙循环次数的增加而降低，最低为38.3 Ω/?；织物的应变传感性能测试表明，MXene改性罗纹针织物传感性能具有明显的各向异性，并且横列方向的传感性能优于纵行方向。MXene改性罗纹针织物横列方向的传感系数和传感区间分别高达72.8、0~160%，远高于纵行方向（最大传感系数为4.4，传感区间为0~24%）。

Abstract:

Inspired by the dyeing processes, a highly elastic and conductive transition metal carbide/nitride (MXene) modified rib knitting fabric was prepared via a scalable roll-to-roll technology. Characterizations on the structure and performance of composite fabrics were conducted through SEM, resistance measurement, sensing performance testing. The results show that MXene modified rib knitting fabric has good elasticity and elastic recovery, and the MXene loading in the composite fabric increased with roll-to-roll cycles. On the contrary, the electrical resistance decreased with roll-to-roll cycles, and the minimum sheet resistance can be low as 38.3 Ω/?. The strain sensing performance test of the composite fabrics show that the MXene modified rib knitting fabric exhibit anisotropic strain sensing performance, and the strain sensing performance in course direction was better than that in the wale direction. In addition, the maximum gauge factor and sensing range were 72.8 and 0~160%, respectively, which were higher than those in wale direction (gauge factor: 4.4, sensing range: 0~24%). More importantly, the MXene modified rib knitting fabric exhibited superior sensing performance than the majority of reported woven and knitted fabric-based strain sensors, and can be used as a wearable flexible strain sensor to monitor various movements of the human body, demonstrating great potential in the field of intelligent wearable applications.