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Issue 28, 2019
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Lyophobic slippery surfaces on smooth/hierarchical structured substrates and investigations of their dynamic liquid repellency

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Abstract

Slippery surfaces were prepared by infusing lubricant into smooth or hierarchical-structured superhydrophobic surfaces (SHS) to compare different surface-free energies. The surfaces obtained showed good repellency towards liquids with various values of surface tension/molecular polarity/viscosity, including hexane, tetradecane, water, ethylene glycol and viscous engine oil. The lyophobicity could be realized on a relatively smooth surface, indicating that the first principle of preparing a lyophobic slippery surface is to perform a low surface-free energy modification. The dynamic liquid repellency was also studied: the sliding speeds of different liquids on lubricant infused SHS showed a negative correlation to their kinematic viscosity values, and a higher surface roughness was favorable for dynamic wettability, whereas for the smooth slippery surface, the travelling speeds showed randomness.

Graphical abstract: Lyophobic slippery surfaces on smooth/hierarchical structured substrates and investigations of their dynamic liquid repellency

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Publication details

The article was received on 16 Apr 2019, accepted on 26 Jun 2019 and first published on 28 Jun 2019


Article type: Paper
DOI: 10.1039/C9CP02132A
Phys. Chem. Chem. Phys., 2019,21, 15705-15711

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    Lyophobic slippery surfaces on smooth/hierarchical structured substrates and investigations of their dynamic liquid repellency

    N. Wang, L. Tang, Y. Cai and D. Xiong, Phys. Chem. Chem. Phys., 2019, 21, 15705
    DOI: 10.1039/C9CP02132A

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