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Halvey AK, Macdonald B, Golovin K, Boban M, Dhyani A, Lee DH, Gose JW, Ceccio SL, Tuteja A. Rapid and Robust Surface Treatment for Simultaneous Solid and Liquid Repellency. ACS Appl Mater Interfaces 2021; 13:53171-53180. [PMID: 34709778 DOI: 10.1021/acsami.1c14174] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
A wide range of liquid and solid contaminants can adhere to everyday functional surfaces and dramatically alter their performance. Numerous surface modification strategies have been developed that can reduce the fouling of some solids or repel certain liquids but are generally limited to specific contaminants or class of foulants. This is due to the typically distinct mechanisms that are employed to repel liquids vs solids. Here, we demonstrate a rapid and facile surface modification technique that yields a thin film of linear chain siloxane molecules covalently tethered to a surface. We investigate and characterize the liquid-like morphology of these surfaces in detail as the key contributing factor to their anti-fouling performance. This surface treatment is extremely durable and readily repels a broad range of liquids with varying surface tensions and polarities, including water, oils, organic solvents, and even fluorinated solvents. Additionally, the flexible, liquid-like nature of these surfaces enables interfacial slippage, which dramatically reduces adhesion to various types of solids, including ice, wax, calcined gypsum, and cyanoacrylate adhesives, and also minimizes the nucleation of inorganic scale. The developed surfaces are durable and simple to fabricate, and they minimize fouling by both liquids and solids simultaneously.
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Affiliation(s)
- Alex Kate Halvey
- Department of Materials Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109, United States
- Biointerfaces Institute, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Brian Macdonald
- Department of Materials Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109, United States
- Biointerfaces Institute, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Kevin Golovin
- Department of Materials Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109, United States
- Biointerfaces Institute, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Mathew Boban
- Department of Macromolecular Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109, United States
- Biointerfaces Institute, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Abhishek Dhyani
- Department of Macromolecular Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109, United States
- Biointerfaces Institute, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Duck Hyun Lee
- Department of Materials Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109, United States
- Biointerfaces Institute, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - James W Gose
- Department of Naval Architecture and Marine Engineering, University of Michigan, Ann Arbor 48109, Michigan, United States
| | - Steven L Ceccio
- Department of Naval Architecture and Marine Engineering, University of Michigan, Ann Arbor 48109, Michigan, United States
| | - Anish Tuteja
- Department of Materials Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109, United States
- Department of Macromolecular Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109, United States
- Department of Chemical Engineering, University of Michigan, Ann Arbor 48109, Michigan, United States
- Biointerfaces Institute, University of Michigan, Ann Arbor, Michigan 48109, United States
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Hartenberger JD, Callison EG, Gose JW, Perlin M, Ceccio SL. Drag production mechanisms of filamentous biofilms. Biofouling 2020; 36:736-752. [PMID: 32811170 DOI: 10.1080/08927014.2020.1806250] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/11/2020] [Revised: 07/27/2020] [Accepted: 08/01/2020] [Indexed: 06/11/2023]
Abstract
Biofilms were grown on smooth acrylic surfaces for nominal incubation times of three, five, and ten weeks in a flow loop at the University of Michigan. The biofilm covered surfaces were exposed to the turbulent flow in a high-aspect ratio, fully developed channel flow facility at height-based Reynolds numbers from ReH ≈ 5,000 to 30,000. Measurements of the pressure drop along each fouled upper surface revealed that the friction drag increased from approximately 10% to 400%. The wide range in drag penalty was linked to variations in flow speed, the average thickness of the biofilms, and the level of film coverage over each surface through scaling parameters and empirical correlations. Rigid replicas of select biofilms were produced from time-averaged laser scans collected while the biofilm was subjected to flow. These rigid biofilm replicas experienced roughly half the drag increase of their compliant counterparts with the increase in friction spanning roughly 50% to 200%.
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Affiliation(s)
- Joel D Hartenberger
- Department of Naval Architecture and Marine Engineering, University of Michigan, Ann Arbor, MI, USA
| | - Elizabeth G Callison
- Department of Naval Architecture and Marine Engineering, University of Michigan, Ann Arbor, MI, USA
| | - James W Gose
- Department of Naval Architecture and Marine Engineering, University of Michigan, Ann Arbor, MI, USA
| | - Marc Perlin
- Department of Naval Architecture and Marine Engineering, University of Michigan, Ann Arbor, MI, USA
- Department of Ocean Engineering, Texas A&M University, College Station, TX, USA
| | - Steven L Ceccio
- Department of Naval Architecture and Marine Engineering, University of Michigan, Ann Arbor, MI, USA
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Golovin KB, Gose JW, Perlin M, Ceccio SL, Tuteja A. Bioinspired surfaces for turbulent drag reduction. Philos Trans A Math Phys Eng Sci 2016; 374:rsta.2016.0189. [PMID: 27354731 PMCID: PMC4928507 DOI: 10.1098/rsta.2016.0189] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 04/27/2016] [Indexed: 05/03/2023]
Abstract
In this review, we discuss how superhydrophobic surfaces (SHSs) can provide friction drag reduction in turbulent flow. Whereas biomimetic SHSs are known to reduce drag in laminar flow, turbulence adds many new challenges. We first provide an overview on designing SHSs, and how these surfaces can cause slip in the laminar regime. We then discuss recent studies evaluating drag on SHSs in turbulent flow, both computationally and experimentally. The effects of streamwise and spanwise slip for canonical, structured surfaces are well characterized by direct numerical simulations, and several experimental studies have validated these results. However, the complex and hierarchical textures of scalable SHSs that can be applied over large areas generate additional complications. Many studies on such surfaces have measured no drag reduction, or even a drag increase in turbulent flow. We discuss how surface wettability, roughness effects and some newly found scaling laws can help explain these varied results. Overall, we discuss how, to effectively reduce drag in turbulent flow, an SHS should have: preferentially streamwise-aligned features to enhance favourable slip, a capillary resistance of the order of megapascals, and a roughness no larger than 0.5, when non-dimensionalized by the viscous length scale.This article is part of the themed issue 'Bioinspired hierarchically structured surfaces for green science'.
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Affiliation(s)
- Kevin B Golovin
- Department of Materials Science and Engineering, University of Michigan, Ann Arbor, MI 48109, USA
| | - James W Gose
- Department of Naval Architecture and Marine Engineering, University of Michigan, Ann Arbor, MI 48109, USA
| | - Marc Perlin
- Department of Naval Architecture and Marine Engineering, University of Michigan, Ann Arbor, MI 48109, USA
| | - Steven L Ceccio
- Department of Naval Architecture and Marine Engineering, University of Michigan, Ann Arbor, MI 48109, USA
| | - Anish Tuteja
- Department of Materials Science and Engineering, University of Michigan, Ann Arbor, MI 48109, USA Department of Chemical Engineering, University of Michigan, Ann Arbor, MI 48109, USA Department of Macromolecular Science and Engineering, University of Michigan, Ann Arbor, MI 48109, USA
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