Preparation and sensing performance investigation of triaxial conductive fibers based on carbonaceous materials
To address the issues encountered in existing smart wearable devices,such as poor conductivity,lack of durability,limited functional applications,and an inability to fully meet the requirements of smart wearable systems,this study employed a wet spinning technique to fabri-cate triaxial conductive fibers using polyurethane as the matrix and graphene and carbon nano-tubes as conductive materials.The sensing performance of these fibers was investigated through morphological characterization and performance testing,and their application in real-world sce-narios was assessed.The experimental results demonstrated that the core and outer layers of pol-yurethane provide support and protection,endowing the three types of conductive fibers with high sensitivity(up to 249),excellent stretchability(600％),and robust durability.Among them,graphene-based conductive fibers exhibited the highest sensitivity and generated the largest elec-trical signal under the same frequency and bending depth,indicating superior sensing perform-ance.All three types of conductive fibers were able to stably output electrical signals after under-going more than 1 000 stretching cycles and could reliably monitor the amplitude of movement and the generated electrical signals in different body parts during the stretching and recovery proces-ses associated with joint movements.These findings suggest that these fibers have promising applications as flexible wearable sensors.
国家科技期刊平台
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