Strong and Tough PAm/SA Hydrogel with Highly Strain Sensitivity

The hydrogel is a preferred material for flexible wearable sensors. In practical application, it should have high-efficiency mechanical toughness and self-healing performance. Besides, requires good affinity adhesion because of its contact with the skin. this experiment, we made an ultra-tough excellent cell adhesion. We used sodium alginate (SA) polyacrylamide (PAm) mixture as base fluid. Polydopamine reduce graphene oxide (prGO) was conductive nanofiller, then PAm-prGO-SA semi-interpenetrating network formed through Am radical polymerization. presence prGO endows hydrogels electrical conductivity. Simultaneously, some non-reduced GO forms non-covalent cross-links PAm, SA, (PDA) in network. stress can reach 750 KPa, strain 900%. hydrogel, combined electrical, properties, biocompatibility, expected to be applied portable, remote, real-time health monitoring systems.