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  • Reversibly Thermosecreting ...
    Ru, Yunfei; Fang, Ruochen; Gu, Zhandong; Jiang, Lei; Liu, Mingjie

    Angewandte Chemie International Edition, July 13, 2020, Letnik: 59, Številka: 29
    Journal Article

    Synthetic gels with switchable interfacial properties have great potential in smart devices and controllable transport. Herein, we design an organogel by incorporating a binary liquid mixture with an upper critical solution temperature (UCST) into a polymer network, resulting in reversible modulation of lubrication and adhesion properties. As the temperature changes, the lubricating mechanism changes reversibly from boundary lubrication to hydrodynamic lubrication due to phase separation within the binary solution permeating the gel (friction coefficient 0.4–0.03). Droplets appear on the gel surface at low temperature and disappear with temperature higher than the critical phase separation temperature (Tps) of the organogel. The organogel possesses a relatively low ice adhesive strength (less than 1 kPa). This material has potential applications in anti‐icing and smart devices, and we believe that this design strategy can be expanded to other systems such as aqueous solutions and hydrogels. Thermosecreting organogel: Binary‐solution‐permeated organogels undergo thermoresponsive phase separation. The reversible secretion‐absorption of droplets change the lubricating mechanism and produce anti‐icing property.