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    3D-Printed Repeating Re-Entrant Topography to Achieve On-Demand Wettability and Separation

    Year: 2020

    Journal: ACS Appl. Mater. Interfaces, Volume 12, AUG 5, page 35725–35730

    Authors: Wang, BC; Chen, J; Kowall, C; Li, L

    Organizations: U.S. Department of Energy's Office of Energy Efficiency and Renewable Energy (EERE) under the Advanced Manufacturing OfficeUnited States Department of Energy (DOE) [DE-EE0007888]

    Keywords: repeating re-entrant topography; 3D printing; wettability; superhydrophobicity; wastewater

    While it is difficult and expensive to fabricate a complicated surface structure via conventional techniques, three-dimensional (3D) printing serves as a time-efficient and cost-efficient alternative. In the current study, a novel repeating re-entrant topography is fabricated by two-photon polymerization 3D printing. The experimental results show that the repeating re-entrant surface enhances the desired on-demand surface wettability. Moreover, the 3D-printed membranes with the repeating re-entrant structures enable the efficient on-demand separation of liquid mixtures with high flux, which is critical for the wastewater treatment in the chemical industry.
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