(604h) Magnetic- and Light-Driven Wettability Switching of Fluorinated Ionic Liquid Infused Slippery Surfaces

The developments of stimulus responsive slippery surfaces have attracted widespread attention for the potential application in liquid directional motion systems^1-2. Although, many smart slippery surfaces with reversible wettability are developed based on the phase transition of lubricants. The challenges remain in preparing multi-responsive intelligent slippery surfaces based on a novel phase-transition lubricant. In this work, a magnetic-thermal and photo-thermal driven slippery surface was fabricated based on the fluorinated ionic liquid (FIL), a new type of thermo-driven phase-transition lubricants, and fluoropolymer film as the underlying substrates. The substrates presented efficient self-repairing performance and magnetic-thermal, photo-thermal conversion efficiency. The slippery surfaces showed prominent stability and excellent liquid repellency properties. Under light irradiation or magnetic field, the wettability switching and droplet motion on this surface were precisely adjusted by tuning the surface temperature. The driven temperature was easy to be revised by changing the melting temperature of FIL. It is worth mentioning that the FIL synthesized here are first reported and the wettability switching of ionic liquid infused slippery surfaces has rarely been reported. In addition, the freezing time of FIL-1H3M infused slippery surfaces was extended to 3605s. This work developed a novel phase-transition lubricant to fabricate smart slippery surfaces. Thus promoting the application of the slippery surfaces in biomedical devices and micro-fluid system.

Reference

[1] Rao, Q.; Li, A.; Zhang, J.; Jiang, J.; Zhang, Q,; Zhan, X.; Chen, F.; Multi-Functional Fluorinated Ionic Liquid Infused Slippery Surfaces with Dual-Responsive Wettability Switching and Self-Repairing. J. Mater. Chem. A. 2109, 7, 2172-2183.

[2] Wei, C.; Zhang, G.; Zhang, Q.; Zhan, X.; Chen, F.; Silicone Oil-Infused Slippery Surfaces Based on Sol−Gel Process-Induced Nanocomposite Coatings: A Facile Approach to Highly Stable Bioinspired Surface for Biofouling Resistance. ACS Appl. Mater. Interfaces. 2016, 8, 34810-34819.