Pressure-sensitive Sensing Fabrics Based On MXene And Its Wearable Application

As an emerging 2-D nanomaterial,MXene has high electrical conductivity,high electron mobility,good biocompatibility,and diverse morphology due to its special structure and abundant surface functional groups.The field of sense has great research prospects.At the same time,MXene is a room temperature photothermal conversion far-infrared high-radiation material with a high photothermal conversion rate.It can absorb environmental heat and output as far-infrared energy,and can be applied to multifunctional wearable devices.Based on this,this paper starts from the fabric substrate,uses MXene material with a single and few-layer structure to support different fabric substrates,and compares and selects the substrate with the best MXene loading performance.A single MXene-coated pure cotton yarn is used to construct a functional fabric with both force-sensitive sensing and electromagnetic shielding characteristics.The environment-friendly polymer materials sodium alginate(SA)and MXene were used for microfluidic wet spinning to prepare MXene/SA composite fibers and their sensing and electromagnetic shielding properties were analyzed and discussed.The specific content of the study is as follows:Preparation of MXene sensing material and selection of fabric substrate:Ti₃C₂T_x-MXene nanosheets with single and few-layer structures are prepared by chemical etching,and MXene is loaded on the pretreated fabric substrate surface by multiple coatings to obtain MXene/fabric composite material.This simple and quick composite method makes the fabric loaded with MXene have certain electrical conductivity and electromagnetic shielding characteristics.Compare the practicability(including adsorption capacity,durable washing performance)and wearing comfort of various fabrics loaded with MXene.Finally,cotton is selected as the base for the construction of fabric sensor devices.MXene coated cotton pressure-sensitive sensing fabric and its wearable application:Used cotton as the fabric substrate to load MXene nanosheets to prepare MXene/cotton pressure-sensitive sensing fabric.The reason for the firm load of MXene nanosheets on the surface of cotton fabrics was explored;the sensing performance and electromagnetic shielding performance of MXene/cotton pressure-sensitive fabrics were tested;diversified wearable applications for sensing fabrics were developed.On the one hand,an array of pressure-sensitive sensor modules is constructed on the fabric to monitor the different stress levels of different parts,and the PC music playback software MXene Tools adapted to the fabric sensor is developed to realize the practical application of wearable man-machine interface.On the other hand,combining functional fabrics with ordinary clothing can effectively shield electromagnetic radiation and protect human health.Pressure-sensitive sensing fabric based on MXene/SA fiber and its wearable applications:MXene/SA composite fiber was prepared by microfluidic spinning method.The mechanical strength and electrical properties of the MXene/SA composite fiber with different MXene addition amount,as well as the electromagnetic shielding characteristics of its braid,were explored,and the sensing performance of the MXene/SA fabric with the optimal MXene content was tested,and it is applied to the small deformation sensing of speech recognition.Our method for preparing MXene/SA composite fibers and fabric devices based on wet microfluidic spinning provides a way to prepare functional nanocomposite fibers and fabric-based wearable sensor devices.