具有稳定电响应的PAM/PVA/PDA@rGO复合水凝胶传感器的制备及在人体运动监测与人机交互中的应用OA

Aiming at the defects of poor signal linearity,low repeatability and inferior fatigue resistance existing in cur-rent flexible strain sensors for human motion monitoring and human-computer interaction,the polyacrylamide/polyvi-nyl alcohol/polydopamine-modified reduced graphene oxide(PAM/PVA/PDA@rGO)composite conductive hydrogel sensor was prepared by a one-pot free radical polymerization.In this hydrogel sensor,the PVA chains form dynamic hy-drogen bonds with the PAM network,and PDA@rGO acts as a multifunctional physical crosslinking point,significantly enhancing the mechanical properties.Its maximum toughness is 1522.55 kJ/m3,and Young's modulus reaches 13.72 kPa.The maximum sensitivity reaches 6.25 within the strain range of 0%-300%,with response time of e 105 ms and re-covery time of 90 ms.It can maintain stable electrical signals after 500 tensile cyclic tests.The sensor can effectively monitor human joint movements and subtle physiological behaviors including swallowing and facial deformation.At the same time,combined with machine learning to establish a human-machine interaction system,the sensor can drive manipulators to reproduce human motions in real time,and the recognition accuracy for nine distinct gestures achieves 99.47%.