Asymmetric fibers for efficient fog harvesting

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

3 Scopus Citations
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Detail(s)

Original languageEnglish
Article number128944
Journal / PublicationChemical Engineering Journal
Volume415
Online published19 Feb 2021
Publication statusPublished - 1 Jul 2021

Abstract

Access to sustainable, clean, and safe freshwater remains a global challenge. Harvesting atmospheric fog droplets with mesh collectors enables an environmental-friendly supply of good-quality freshwater. However, the functional outcomes of existing fibers used in collectors are not satisfactory, because of the inadequacies of conventional fiber design in engineering the surface microstructures and properties. By selectively combining functionalities and advantages of natural structures, we design fibers with synergistic asymmetry in their shape, surface roughness, and surface chemistry to simultaneously enhance fog deposition and water drainage. We draw inspiration from the rugged shape of Gunnera leaf to enhance fog deposition, the hierarchical surface roughness of Cotula leaf to lubricate the pathway for rapid water drainage, and the heterogeneous wettability of the Namib Desert beetle to promote the directional water transport in bridging fog deposition and water drainage. These fibers achieve a fog-harvesting rate of up to 8.2 × 10−3 g cm−2 s−1, a 7-time enhancement, and thus represent a step-change in addressing the grand challenge of global water shortage.

Research Area(s)

  • 3D printing, Asymmetric fiber, Fog harvesting, Microfluidics, Synergistic bioinspiration

Citation Format(s)

Asymmetric fibers for efficient fog harvesting. / Zhu, Pingan; Chen, Rifei; Zhou, Chunmei; Tian, Ye; Wang, Liqiu.

In: Chemical Engineering Journal, Vol. 415, 128944, 01.07.2021.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review