Omni-adhesive fibers via Taylor-cone co-electrospinning towards cold-supply chain

Developing omni-adhesives is a great challenge for those oil/water wetted substrates because the interfacial liquid always restricts the contact area between adhesives and substrates. Herein, we report omni-adhesive fibers composed of oilborne core-fiber and waterborne semi-nanoshell via Taylor-cone co-electrospinning, realizing efficient adhesion on diverse liquid wetted substrates with cold tolerance. The oilborne core-fiber and waterborne semi-nanoshell enable the omni-adhesive fibers to adhere onto solid substrates wetted by diverse liquids, such as aqueous solutions with acid, base and salts, organic solvents and daily drinks, through a partial dissolving-wetting-adhering process. Further, the formed nano-adhesive layer of omni-adhesive fibers shows wide-range temperature tolerance from −196–60 ℃. As a proof-of-concept study, we demonstrate a temperature monitor based on omni-adhesive fibers can indicate the temperature fluctuation of cold-supply chain, such as vaccine transport. This study provides a feasible route to design omni-adhesives adaptive to complex liquid wetted substrates in large temperature fluctuations.