Development and application of pressure sensors based on MXene composite cotton fabrics with graded particle size
In recent years,textile-based sensors have gained significant attention in the sensing field,owing to their outstanding flexibility and breathability.MXene has emerged as an ideal choice for the flexible sensors due to its excellent electrical conductivity,biocompatibility and mechanical properties.However,the fabrication of MXene-based flexible fabric sensors is generally complex.In this study,a straightforward and efficient filtration method was used to fabricate the MXene composite cotton fabrics,and the impact of MXene particle size on the morphology,conductivity,washability,breathability,and tensile strength of the composite fabrics was investigated.It was found that by employing a gradient particle size-based layered loading,the overall performance of MXene composite cotton fabrics was significantly enhanced.Furthermore,the influence of varying MXene concentrations on the sensitivity of the pressure sensor was investigated.When the concentration is 0.4 mg/mL,the MXene-based sensors exhibits high sensitivity(64.95 kPa-1)over a broad sensing range(0-160 kPa),rapid response and recovery times(127 ms/165 ms),low detection limit(10.8 Pa),and robust durability(1000 cycles).The sensor can not only be used for the detection of the human motion,but also served as an efficient independent heater,which offers a new research foundation for functional monitoring and medical diagnostic applications.
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