This study focuses on the development and evaluation of a capacitive flexible pressure sensor based on gallium-based liquid metal.The sensor was constructed using a gallium-indium-tin alloy known as Galinstan,combined with carbon black(CB)and polydimethylsiloxane(PDMS)to form the dielectric layer via sacrificial template methodology.Additionally,the electrodes for the sensor were created by screen-printing a gallium-based liquid metal eutectic gallium-indium alloy(EGaIn)onto the conventional fabric using screen printing technique.After the packaging,the sensing performance of the sensor were tested.This sensor exhibited high sensitivity at 0.18 kPa-1,minimal hysteresis,swift response time of 140 ms,and recovery time of 180 ms,alongside exceptional cyclic durability and stability.The potential applications of the sensor in human activity monitoring,exemplified by tracking bicycle pedaling frequency and walking pace were discussed,affirming its effectiveness in motion analysis and health surveillance.This work validates the feasibility and potential of this novel flexible pressure sensor,and insights for future research endeavors and practical implementations was provided.
关键词
镓基液态金属/电容式压力传感器/镓铟锡合金/炭黑/可穿戴设备/丝网印刷/运动监测
Key words
gallium based liquid metal/capacitive pressure sensor/Galinstan/CB/wearable devices/screen printing/motion monitoring
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