Magnetocontrollable droplet and bubble manipulation on a stable amphibious slippery gel surface

Pu Guo, Zubin Wang, Liping Heng, Yuqi Zhang, Xuan Wang, Lei Jiang

Research output: Contribution to journalArticleResearchpeer-review

22 Citations (Scopus)

Abstract

Smart manipulation of liquid/bubble transport has garnered widespread attention due to its potential applications in many fields. Designing a responsive surface has emerged as an effective strategy for achieving controllable transport of liquids/bubbles. However, it is still challenging to fabricate stable amphibious responsive surfaces that can be used for the smart manipulation of liquid in air and bubbles underwater. Here, amphibious slippery surfaces are fabricated using magnetically responsive soft poly(dimethylsiloxane) doped with iron powder and silicone oil. The slippery gel surface retains its magnetic responsiveness and demonstrates strong affinity for bubbles underwater but shows small and switching resistance forces with the water droplets in air and bubbles underwater, which is the key factor for achieving the controllable transport of liquids/bubbles. On the slippery gel surface, the sliding behaviors of water droplets and bubbles can be reversibly controlled by alternately applying/removing an external magnetic field. Notably, compared with slippery liquid-infused porous surfaces, the slippery gel surface demonstrates outstanding stability, whether in air or underwater, even after 100 cycles of alternately applying/removing the magnetic field. This surface shows potential applications in gas/liquid microreactors, gas–liquid mixed fluid transportation, bubble/droplet manipulation, etc.

Original languageEnglish
Article number1808717
Number of pages10
JournalAdvanced Functional Materials
Volume29
Issue number11
DOIs
Publication statusPublished - 14 Mar 2019
Externally publishedYes

Keywords

  • amphibious
  • bubble sliding
  • droplet sliding
  • magnetically responsive
  • slippery gel surface

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