Preparation and performance of highly sensitive MXene-based fiber sensors
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(σ50)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.
万方数据
维普
