The Fabrication of a Highly Sensitive, Wearable Sensor Utilizing V₂C Nanohydrogel and Its Intelligent Applications in Education Training

With the advancements in technology, there is an increasing demand for enhanced flexibility and convenience in flexible wearable sensors. A composite nanohydrogel sensor with excellent mechanical properties, high sensitivity, high stability, and real-time monitoring was prepared in this work. The hydrogel is made up of polyacrylamide, poly(vinyl alcohol), and V2C nanosheets. The integration of conductive V2C nanosheets substantially enhances the sensor’s conductivity and sensitivity. At the same tensile strain, the conductivity of the hydrogel increased by 80% with the addition of conductive material. The hydrogel achieves a maximum elongation of 1300% and maintains excellent linearity and sensitivity (2.46), even under a high tensile strain of 500%, ensuring a broad operational range for the wearable sensor. In addition, the sensor exhibits good repeatability (10 000 cycles) and impressive response/recovery times, recording 0.588 and 0.814 s under tension and 0.744 and 0.852 s under compression, respectively, ensuring real-time detection capabilities. Due to this outstanding performance, it was made into a wearable sensor for real-time monitoring of piano training, physical exercises, facial expressions, and gesture recognition, among others. Finally, through the analysis of training data sets and integration of Transformer algorithm design, the device can tailor optimal training plans for trainees, thereby enhancing training effectiveness. In summary, this device holds significant promise in augmenting educational performance, personalized training, rehabilitation, etc., thereby positively impacting modern education, sports, and healthcare.