Journal ArticleDOI
Fabrication of “Roll-off” and “Sticky” Superhydrophobic Cellulose Surfaces via Plasma Processing
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TLDR
In this article, a domain-selective etching of amorphous portions of the cellulose in an oxygen plasma and subsequently coating the etched surface with a thin fluorocarbon film deposited via plasma-enhanced chemical vapor deposition using pentafluoroethane as a precursor yielded two types of superhydrophobicity: "roll-off" (contact angle (CA), 166.7 degrees +/- 0.9 degrees ; CA hysteresis, 3.4 degrees +/- 1.1 degrees ) and "sticky" (CA, 144.8 degrees +/-Abstract:
Most of the artificial superhydrophobic surfaces that have been fabricated to date are not biodegradable, renewable, or mechanically flexible and are often expensive, which limits their potential applications. In contrast, cellulose, a biodegradable, renewable, flexible, inexpensive, biopolymer which is abundantly present in nature, satisfies all the above requirements, but it is not superhydrophobic. Superhydrophobicity on cellulose paper was obtained by domain-selective etching of amorphous portions of the cellulose in an oxygen plasma and subsequently coating the etched surface with a thin fluorocarbon film deposited via plasma-enhanced chemical vapor deposition using pentafluoroethane as a precursor. Variation of plasma treatment yielded two types of superhydrophobicity : "roll-off" (contact angle (CA), 166.7 degrees +/- 0.9 degrees ; CA hysteresis, 3.4 degrees +/- 0.1 degrees ) and "sticky" (CA, 144.8 degrees +/- 5.7 degrees ; CA hysteresis, 79.1 degrees +/- 15.8 degrees ) near superhydrophobicity. The nanometer scale roughness obtained by delineating the internal roughness of each fiber and the micrometer scale roughness which is inherent to a cellulose paper surface are robust when compared to roughened structures created by traditional polymer grafting, nanoparticle deposition, or other artificial means.read more
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Bioinspired Surfaces with Superwettability: New Insight on Theory, Design, and Applications
TL;DR: Design, and Applications Shutao Wang,“, Kesong Liu, Xi Yao, and Lei Jiang*,†,‡,§ †Laboratory of Bio-inspired Smart Interface Science, Technical Institute of Physics and Chemistry, and ‡Beijing National Laboratory for Molecular Science.
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Mimicking natural superhydrophobic surfaces and grasping the wetting process: A review on recent progress in preparing superhydrophobic surfaces
TL;DR: The most recent progress in preparing manmade superhydrophobic surfaces through a variety of methodologies, particularly within the past several years, are reviewed and the fundamental theories of wetting phenomena related to superhydphobic surfaces are reviewed.
Journal ArticleDOI
Amphiphilic Egg-Derived Carbon Dots: Rapid Plasma Fabrication, Pyrolysis Process, and Multicolor Printing Patterns
Jing Wang,Cai-Feng Wang,Su Chen +2 more
TL;DR: A simple and rapid strategy to fabricate CDs from cheap and natural carbon sources and further extend their application as printing “inks” for luminescent patterns using inkjet or silk-screen printing is presented.
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Bioinspired super-antiwetting interfaces with special liquid-solid adhesion.
TL;DR: Two biomimetic approaches are proposed for the fabrication of high-adhesion superhydrophobic surfaces that mimic a sticky gecko's foot and microstructures with size and topography similar to that of a rose petal, which will offer innovative insights into the design of novel antibioadhesion materials.
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Superhydrophobic surfaces for the reduction of bacterial adhesion
TL;DR: A detailed review on the basics, recent developments, existing challenges and future perspectives of superhydrophobic surfaces especially in reducing bacterial adhesion is provided in this article, where a new scheme using super-hydrophobicity has raised more attention and interests especially for its ability in reducing bacteria adhesion.
References
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Journal ArticleDOI
Ultrahydrophobic surfaces. Effects of topography length scales on wettability
Didem Öner,Thomas J. McCarthy +1 more
TL;DR: In this article, a series of silicon surfaces were prepared by photolithography and hydrophobized using silanization reagents, and water droplets were pinned on surfaces containing square posts with larger dimensions.
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Recent Studies on Super-Hydrophobic Films
TL;DR: In this article, the fundamental theories on the wettability of a hydrophobic rough solid surface, together with recent works on the processing and properties of super-hydrophobic films are reviewed.
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Super-Hydrophobic Surface of Aligned Polyacrylonitrile Nanofibers
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Superhydrophobic Aligned Polystyrene Nanotube Films with High Adhesive Force
Meihua Jin,Meihua Jin,Xinjian Feng,Lin Feng,Lin Feng,Taolei Sun,Jin Zhai,Tiejin Li,Lei Jiang +8 more
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Ultrahydrophobic polymer surfaces prepared by simultaneous ablation of polypropylene and sputtering of poly(tetrafluoroethylene) using radio frequency plasma
TL;DR: In this paper, a roughened and fluorinated polypropylene surfaces were characterized by water contact angle, X-ray photoelectron spectroscopy (XPS), scanning electron microscopy, and atomic force microscopy (AFM).