Recyclable hydrogel for human-machine interface of multi-mode human vital signal acquisition

Ionic conductive hydrogels have emerged as one of the most promising alternatives to wearable sensors for human motion detecting, owing their unique advantages in biocompatibility, conductivity and flexibility. However, current hydrogel electronics still face limitations non-reusability single-signal detection capability. Here, an ionic based on polyvinyl alcohol, sodium alginate fibers, collagen was prepared by simulating network structure ion conduction mechanism organisms dual-mode signal acquisition electrophysiological signals. Through synergistic regulation fibers collagen, exhibit skin-like mechanical properties with low modulus, high toughness, fatigue resistance maximize wearing comfort capabilities sensors. Furthermore, conductors ion-transporting behavior close can be used epidermal electrodes collect epidermis biopotential containing important physiological information. As a result, through rational design assembly devices, not only continuously accurately identify whole-body signals, but also different signals such electromyogram electrocardiogram Notably, non-covalent cross-linked is completely recyclable, which arbitrarily reconstituted into new electronic devices while retaining original function, improving reusability reducing waste.