Hydrogel Lego Based on Rehydrated Laminate Assembly for Standardized Production and Customized Integration of Multifunctional Hydrogel Sensors

This study presents a novel strategy for creating multifunctional hydrogel sensors using rapid rehydration and modular assembly of prefabricated gel dry films. The approach utilizes a biomass polysaccharide encapsulation composite (KSD) to encapsulate functional materials, which are then dried and rehydrated to form multilayer hydrogel devices. The hydrogel layers bond through metal–ligand interactions, achieving a bond strength of 0.57 MPa in 1.5 minutes. The resulting sensors can detect complex deformations and integrate bacteriostatic layers, offering potential for standardized production and customization in flexible wearable devices.