Highly stretchable, 3D printable ionically conductive organohydrogel for long-time stable strain sensors

Ionically conductive hydrogels represent suitable materials for wearables and prosthetics due to their flexibility and stretchability. However water evaporation limits their applications. Here, a double network conductive 3D printable hydrogel in which water is partially replaced by glycerol to avoid water evaporation and alteration of electrical and sensing properties, is reported. This organohydrogel shows an optimal stretchability (up to 450%), good strain and pressure sensitivity, low hysteresis and maintains its features unchanged for up to one month.