Biomimetic Water-Collecting Fabric with Light-Induced Superhydrophilic Bumps

Yuanfeng Wang, Xiaowen Wang, Chuilin Lai, Huawen Hu, Yeeyee Kong, Bin Fei, John Haozhong Xin

Research output: Journal article publicationJournal articleAcademic researchpeer-review

61 Citations (Scopus)

Abstract

To develop an efficient water-collecting surface that integrates both fast water-capturing and easy drainage properties is of high current interest for addressing global water issues. In this work, a superhydrophobic surface was fabricated on cotton fabric via manipulation of both the surface roughness and surface energy. This was followed by a subsequent spray coating of TiO2nanosol that created light-induced superhydrophilic bumps with a unique raised structure as a result of the interfacial tension of the TiO2nanosol sprayed on the superhydrophobic fiber surface. These raised TiO2bumps induce both a wettability gradient and a shape gradient, synergistically accelerating water coalescence and water collection. The in-depth study revealed that the quantity and the distribution of the TiO2had a significant impact on the final water collection efficiency. This inexpensive and facilely fabricated fabric biomimicks the desert beetle's back and spider silk, which are capable of fog harvesting without additional energy consumption.
Original languageEnglish
Pages (from-to)2950-2960
Number of pages11
JournalACS Applied Materials and Interfaces
Volume8
Issue number5
DOIs
Publication statusPublished - 17 Feb 2016

Keywords

  • biomimetic water collection
  • Laplace pressure gradient
  • light-induced superhydrophilic
  • raised structure
  • wettability gradient

ASJC Scopus subject areas

  • Materials Science(all)

Cite this