Deakin University
Browse

File(s) under permanent embargo

Directional water-transport fabrics achieved by wettablity gradient from superhydrophobicity to hydrophilicity

conference contribution
posted on 2011-01-01, 00:00 authored by Hong Wang, Xungai Wang, Tong Lin
In this study, we demonstrate that fabrics having a wettability gradient from superhydrophobic to hydrophilic through the thickness direction show a novel directional water transfer effect: water can transfer only from the superhydrophobic to the hydrophilic side, but not in the opposite direction unless an external force is applied. A sol-gel technology was used to prepare a superhydrophobic coating on fabrics, and the coated fabrics showed water contact-angle as high as 165°. When the coated fabric was subjected to a photochemistry treatment from one fabric side, the irradiated surface turned hydrophilic permanently, while the back side still maintained the superhydrophobicity. The treated fabric can transfer water droplet rapidly from hydrophobic to hydrophilic side, and the pressure allowing water breakthrough the fabric is different considerably between the two fabric sides. The directional water transfer effect is also affected by the wettability gradient. Such a directional water transfer coating may be useful to develop new functional fabrics for defence applications.

History

Event

Asian Textile Conference (11th : 2011 : Daegu, Korea)

Pagination

698 - 703

Publisher

Korean Fiber Society

Location

Daegu, Korea

Place of publication

[Daegu, Korea]

Start date

2011-11-01

End date

2011-11-04

Language

eng

Publication classification

E2 Full written paper - non-refereed / Abstract reviewed

Title of proceedings

ATC 2011 : Proceedings of the Asian Textile Conference : Knowledge Convergence in Textiles for Human and Nature

Usage metrics

    Research Publications

    Categories

    No categories selected

    Exports

    RefWorks
    BibTeX
    Ref. manager
    Endnote
    DataCite
    NLM
    DC