A new type of fluorinated ionic liquid infused self-repairing slippery surface with double responses and controllable wettability.

Construction of a smart slippery surface with UV-driven programmable droplet-guiding pathways and controllable surface color change.

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Smart slippery liquid-infused porous surfaces (SLIPSs) have aroused remarkable attention owing to tremendous application foreground in biomedical instruments and industry. However, challenges still remain in fabricating durable SLIPSs. In this work, a fast and highly efficient self-repairing slippery surface (SPU-60M) was fabricated based on a polyurethane membrane and silicone oil. By introducing a great quantity of reversible disulfide bonds into the polymer backbone and hydrogen bonds in the polymer interchain, this SLIPS material could be quickly repaired in 15 min with 97.8% healing efficiency. Moreover, the self-healing efficiency could be maintained at 42.75% after the 10th cutting−healing cycle. Notably, SPU-60M showed excellent selfrepairing ability not only in an ambient environment but also in an underwater environment and at ultralow temperatures. Besides, the icing delay time (DT) of SPU-60M could be prolonged to 1182 s at −15 °C, and the ice adhesion strength was only 10.33 kPa at −30 °C. In addition, SPU-60M had excellent anti-fouling performance with BSA adsorption of 2.41 μg/cm 2 and Escherichia coli CFU counts of 41 × 10 4 . These findings provide a facile way to design highly efficient self-repairing SLIPSs with multifunctionality.

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