Nanoconfined eutectogel engineered with environmentally resistant properties for wireless sensing

Conductive gels are among the most popular flexible materials for wearable devices due to stretchability, customizable functionality and adjustable modulus close to that of tissue. Nevertheless, the structural failure and performance deterioration of gel materials under extreme environments remain a significant challenge, restricting their practical applications. Herein, drawing inspiration from the natural composite, a polymerizable deep eutectic solvent was employed to construct an environment-tolerant gel. Meanwhile, a nanoconfinement strategy based on metal-organic frameworks was proposed for enhancing their mechanical properties. With the aid of liquid metal stabilized by silk fibroin serving as initiator, the prepared eutectogel exhibits a desirable combination of great mechanical properties, self-adhesive abilities as well as high conductivity. The eutectogel withstands wide working temperatures and exhibits high stretchability, as well as desirable self-healing properties under extreme conditions. The strain sensor made from the eutectogel could not only demonstrate real-time monitoring of various human joint movements, but also be integrated into a wireless monitoring system, realizing remote human-machine interaction. Based on the synergistic design mentioned, the proposed sensor has promising applications in all-weather wearable electronics.