Flexible Bioinspired Healable Antibacterial Electronics for Intelligent Human-Machine Interaction Sensing

Flexible electronic sensors are receiving numerous research interests for their potential in electronic skins (e-skins), wearable human-machine interfacing, and smart diagnostic healthcare sensing. However, the preparation of multifunctional flexible electronics with high sensitivity, broad sensing range, fast response, efficient healability, and reliable antibacterial capability is still a substantial challenge. Herein, bioinspired by the highly sensitive human skin microstructure (protective epidermis/spinous sensing structure/nerve conduction network), a skin bionic multifunctional electronics is prepared by face-to-face assembly of a newly prepared healable, recyclable, and antibacterial polyurethane elastomer matrix with conductive MXene nanosheets-coated microdome array after ingenious templating method as protective epidermis layer/sensing layer, and an interdigitated electrode as signal transmission layer. The polyurethane elastomer matrix functionalized with triple dynamic bonds (reversible hydrogen bonds, oxime carbamate bonds, and copper (II) ion coordination bonds) is newly prepared, demonstrating excellent healability with highly healing efficiency, robust recyclability, and reliable antibacterial capability, as well as good biocompatibility. Benefiting from the superior mechanical performance of the polyurethane elastomer matrix and the unique skin bionic microstructure of the sensor, the as-assembled flexible electronics exhibit admirable sensing performances featuring ultrahigh sensitivity (up to 1573.05 kPa-1), broad sensing range (up to 325 kPa), good reproducibility, the fast response time (approximate to 4 ms), and low detection limit (approximate to 0.98 Pa) in diagnostic human healthcare monitoring, excellent healability, and reliable antibacterial performance. A skin bionic healable antibacterial electronics is fabricated by assembling a newly prepared healable, recyclable, and antibacterial polyurethane elastomer with MXene nanosheets-coated microdome array microstructures and an interdigitated electrode face-to-face, exhibiting ultrahigh sensitivity (up to 1573.05 kPa-1), broad sensing range (up to 325 kPa), low detection limit (approximate to 0.98 Pa), excellent healability and antibacterial performance for sensitively intelligent human-machine interaction sensing.image