Interpenetrating janus membrane for high rectification ratio liquid unidirectional penetration

Lanlan Hou, Nü Wang, Xingkun Man, Zhimin Cui, Jing Wu, Jingchong Liu, Shuai Li, Yuan Gao, Dianming Li, Lei Jiang, Yong Zhao

Research output: Contribution to journalArticleResearchpeer-review

17 Citations (Scopus)

Abstract

Anisotropic interfaces with opposite properties provide numerous unusual physical chemical properties that have played irreplaceable roles in broad domains. Here, we rationally designed an anisotropic Janus membrane with opposite wettability and special interpenetrating interface microstructure, which shows a unidirectional liquid penetration "diode" performance. Liquid is allowed to penetrate from lyophobic to lyophilic direction but is blocked in the reverse direction. Although conventional works suggested the liquid unidirectional penetration is driven by anisotropic wettability in heterogeneous interfaces, here, we theoretically and experimentally reveal that special interpenetrating topology plays another important role in liquid unidirectional penetration. This insight gives a general guide to build a series of Janus membranes for liquid unidirectional penetration with high hydraulic pressure rectification ratio. The liquid diode Janus membrane indicates great promise for liquid manipulation, smart separation membranes, functional textiles, and other fields.

Original languageEnglish
Pages (from-to)4124-4132
Number of pages9
JournalACS Nano
Volume13
Issue number4
DOIs
Publication statusPublished - 23 Apr 2019
Externally publishedYes

Keywords

  • electrospinning
  • Laplace pressure
  • nanofibers
  • unidirectional penetration
  • wettability

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