A super liquid-repellent hierarchical porous membrane for enhanced membrane distillation

Youmin Hou, Prexa Shah, Vassilios Constantoudis, Evangelos Gogolides, Michael Kappl () and Hans-Jürgen Butt
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Youmin Hou: Max Planck Institute for Polymer Research
Prexa Shah: Max Planck Institute for Polymer Research
Vassilios Constantoudis: Institute of Nanoscience and Nanotechnology NCSR Demokritos
Evangelos Gogolides: Institute of Nanoscience and Nanotechnology NCSR Demokritos
Michael Kappl: Max Planck Institute for Polymer Research
Hans-Jürgen Butt: Max Planck Institute for Polymer Research

Nature Communications, 2023, vol. 14, issue 1, 1-11

Abstract: Abstract Membrane distillation (MD) is an emerging desalination technology that exploits phase change to separate water vapor from saline based on low-grade energy. As MD membranes come into contact with saline for days or weeks during desalination, membrane pores have to be sufficiently small (typically 11.5 bar) without compromising vapor transport. With large inner micro-porous structures, the nanofilament-coated membrane improves the distillation flux by up to 60% over the widely used commercially available membranes, while showing excellent salt rejection and operating stability. Our approach will allow the fabrication of high-performance composite membranes with multi-scale porous structures that have wide-ranging applications beyond desalination, such as in cleaning wastewater.

Date: 2023
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DOI: 10.1038/s41467-023-42204-7

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