Digitally Printable Magnetic Liquid Metal Composite for Recyclable Soft‐Matter Electronics

The increasing interest in epidermal patches for wearable monitoring makes it urgent to move toward “greener” and recyclable materials printed electronics. However, combining scalable fabrication, stretchable function, material architecture is challenging achieve. Here, this article introduces a printable biphasic liquid metal (LM)-based composite that combines excellent electrical conductivity, high stretchability, low-electromechanical gauge factor, printability, sinter-free functionality, compatibility with heat-sensitive substrates, thanks the formulation. novel eutectic gallium indium LM-nickel-styrene-isoprene (SIS) thermoplastic elastomer takes advantage of solvent composed mixture methyl acetate, cyclohexane, 4-chlorobenzotrifluoride compared toluene used block copolymers (BCPs). Furthermore, replaces costly micron-sized silver flake filler particles nickel, lower-cost alternative enables facile recyclability by using magnetic force. use BCPs non-permanent physical cross-links possibility recycling. A green route shown recycling composite, only bio-friendly acids daily products such as sugar Epsom salt. application these composites through digital printing circuits switches.