Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry and Environment, Beihang University , Beijing 100191, P. R. China.
School of Chemical Engineering and Technology, State Key Laboratory of Chemical Engineering, Tianjin University , Tianjin 300072, P. R. China.
ACS Appl Mater Interfaces. 2017 Jul 12;9(27):23238-23245. doi: 10.1021/acsami.7b07409. Epub 2017 Jun 27.
Reversible switching of water-droplet adhesion on solid surfaces is of great significance for smart devices, such as microfluidics. In this work, we designed a foolproof method for fast and reversible magnet-controlled switching of water-droplet adhesion surfaces by doping iron powders in soft poly(dimethylsiloxane). The water adhesion is adjusted by magnetic field-induced structure changes, avoiding complex chemical or physical surface design. The regulation process is so convenient that only tens of milliseconds are needed. The on-site responsive mechanism extends its use to unusual curved surfaces. Moreover, the excellent reversibility and stability make the film an ideal candidate for real-time applications.
在智能设备（如微流控）中，固体表面水滴粘附的可逆切换具有重要意义。在这项工作中，我们通过在软质聚二甲基硅氧烷中掺杂铁粉，设计了一种可靠的方法，可快速、可逆地通过磁场控制切换水滴粘附表面。通过磁场诱导的结构变化来调节水的附着力，避免了复杂的化学或物理表面设计。调节过程非常方便，只需几十毫秒。现场响应机制将其应用扩展到了非常规曲面。此外，其优异的可重复性和稳定性使该薄膜成为实时应用的理想选择。
