高灵敏度MXene基纤维传感器的制备及性能  

Preparation and performance of highly sensitive MXene-based fiber sensors

作　　者：宋理阳 韩玮屹 彭军 王潮霞 SONG Liyang;HAN Weiyi;PENG Jun;WANG Chaoxia(College of Textile Science and Engineering,Jiangnan University,Wuxi 214122,Jiangsu,China)

机构地区：[1]江南大学纺织科学与工程学院,江苏无锡214122

出　　处：《精细化工》2024年第10期2158-2163,2179,共7页Fine Chemicals

基　　金：国家自然科学基金项目(21975107)。

摘　　要：以热塑性聚氨酯(TPU)为基底、原位氢氟酸刻蚀法制备的过渡金属碳化物/氮化物(MXene)纳米片为导电材料,经湿法纺丝技术制得了MXene-TPU导电纤维(MTF)。采用SEM、EDS、TGA对其进行了表征,测试了其电导率、力学性能、拉伸应变传感性能,评价了其在人体运动检测中的应用。结果表明,在TPU内部建立的MXene导电网络赋予了MTF高应变灵敏系数(在120%应变下灵敏系数为2930)。MXene的引入提高了MTF的热稳定性,其热分解温度从聚氨酯纤维(TF)的360℃提高到400℃;MXene在纤维表面及内部形成的连续导电通路赋予纤维良好的导电性(电导率为141.54 S/m);MXene也增强了MTF纤维的模量,MXene理论负载量为21.74%的MTF样品(MTF_(2))应变50%时的应力(σ_(50))比TF增大了1.3倍,具备一定的拉伸应变恢复性;MTF_(2)通过电阻变化率的不同来表达人体关节运动形式,可用于人体运动监测。MXene-TPU conductive fiber(MTF)was synthesized via wet spinning using thermoplastic polyurethane(TPU)as substrate and transition metal carbides/nitrides(MXene)nanosheets,prepared through an in-situ hydrofluoric acid etching process,as conductive material,and characterized by SEM,EDS and TGA.Its electrical conductivity,mechanical properties and tensile strain sensing properties were analyzed,followed by evaluation on its application in human motion detection.The results demonstrated that the MXene conductive network built inside the TPU led to a high strain sensitivity coefficient(2930 at 120%strain)for MTF,improved the thermal stability of MTF,with its thermal decomposition temperature increased from 360℃of polyurethane fiber(TF)to 400℃,gave rise to good conductivity via the continuous conductive pathway formed by MXene on the surface and inside of the fiber(conductivity of 141.54 S/m),and enhanced the modulus of MTF,with the stress strain(σ_(50))at a theoretical load of 21.74%MXene(MTF2)at 50%1.3 times higher than that of TF.MTF2 exhibited a certain tensile strain recovery and could be used for human motion monitoring by expressing different resistance change rates to correspond to human joint motion forms.

关 键 词：MXene 聚氨酯 导电纤维 柔性传感器 灵敏度 功能材料 

分 类 号：TQ342[化学工程—化纤工业] TP212[自动化与计算机技术—检测技术与自动化装置] TB34[自动化与计算机技术—控制科学与工程]