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A single-layer Janus membrane with dual gradient conical micropore arrays for self-driving fog collection

Abstract

Inspired by natural creatures, the development of water collection device from fog represents an important research direction. However, present methods suffered from low-efficiency, complex processes, expensive materials etc. In this paper, a single-layer hydrophilic/hydrophobic heterogeneous Janus aluminum membrane based on dual gradient conical micropore arrays is designed and fabricated by laser drilling and subsequent low surface energy modification. The droplets can automatically pass through the conical micropores on the Janus membrane, which results from the wetting driving force of gradient surface energy and the Laplace pressure of the conical morphology. Compared to the superhydrophilic membranes, the Janus membrane possesses a 209% enhancement in the water collection efficiency. This new type of self-driving water collection membrane may offer a way to construct fog collection system with excellent collecting ability to relieve the freshwater crisis.

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Publication details

The article was received on 19 May 2017, accepted on 09 Aug 2017 and first published on 09 Aug 2017


Article type: Communication
DOI: 10.1039/C7TA04392A
Citation: J. Mater. Chem. A, 2017, Accepted Manuscript
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    A single-layer Janus membrane with dual gradient conical micropore arrays for self-driving fog collection

    F. Ren, G. Li, Z. Zhang, X. Zhang, H. Fan, C. Zhou, Y. Wang, Y. Zhang, C. Wang, K. Mu, Y. Su and D. Wu, J. Mater. Chem. A, 2017, Accepted Manuscript , DOI: 10.1039/C7TA04392A

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