Plasma Process. Polym. 5/2013

Her, Eun Kyu; Ko, Tae-Ho; Shin, Byungho; Roh, Hee‐Suk; Dai, Wei; Seong, Won Kyung; Kim, H.-Y.; Lee, K.-R.; Oh, Kyoung-Hee; Moon, Myoung‐Woon

doi:10.1002/ppap.201370013

Cited by 2 publications

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“…[28,29] Creating surface roughness on the polymers is one of the most popular solutions to enhance the hydrophobicity, but often involves nanoparticles [30][31][32] or requires elaborate protocols like lithography, chemical etching, or plasma treatment. [33][34][35][36][37][38] In our previous study of superhydrophobic xerogel coatings made from (±)-N,N'-(trans-cyclohexane-1,2-diyl)-bis(perfluorooctanamide) (CF7), [39][40][41] we found the coating to be quite resistant to intense water flows, since after five cycles of flushing 4 L of deionized water to the xerogel over a minute, the water contact angle (WCA) values hardly decreased (from 153°± 3°to 150°± 6°). However, gravimetric analyses indicated a loss of around 13% of the deposited material after these five flushing cycles.…”

Section: Introductionmentioning

confidence: 99%

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Scratch‐Resistant Hydrophobic Coating with Supramolecular‐Polymer Co‐Assembly

Lee,

Saura‐Sanmartin,

Schalley

2023

Adv Funct Materials

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Supramolecular assembly for superhydrophobic coatings is known for its efficiency and efficacy. However, the mechanical fragility of the coatings limits their use as coating materials. Herein, the combination of (±)‐N,N'‐(trans‐cyclohexane‐1,2‐diyl)‐bis(perfluorooctanamide) CF7, a cyclohexyl diamide‐based low molecular weight gelator, with acrylate polymers for the generation of semi‐transparent omniphobic coatings with significantly enhanced scratch proofness is presented. CF7 has shown the ability to self‐assemble in common solvents into highly entangled fibrous networks with extreme water repellency. The incorporation of covalent polymers, specifically poly(methyl methacrylate) (PMMA) and poly(trifluoroethyl methacrylate) (PTFEMA), helps to fixate the supramolecular CF7 fibers without interfering with the self‐assembled structures. The resulting coatings, namely CF7/PMMA and CF7/PTFEMA, show significantly improved mechanical resistance as well as optical transparency while maintaining excellent water and oil repellency. Furthermore, the homogeneity of the coating in bulk is confirmed by depth profiling of the 3D distribution of the components using time‐of‐flight secondary ion mass spectrometry imaging, which turns out to be an essential technique in order to characterize such materials.

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Section: Introductionmentioning

confidence: 99%

“…[ 28,29 ] Creating surface roughness on the polymers is one of the most popular solutions to enhance the hydrophobicity, but often involves nanoparticles [ 30–32 ] or requires elaborate protocols like lithography, chemical etching, or plasma treatment. [ 33–38 ]…”

Section: Introductionmentioning

confidence: 99%

Scratch‐Resistant Hydrophobic Coating with Supramolecular‐Polymer Co‐Assembly

Lee,

Saura‐Sanmartin,

Schalley

2023

Adv Funct Materials

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Hierarchical structures of AlOOH nanoflakes nested on Si nanopillars with anti-reflectance and superhydrophobicity

Lee

et al. 2013

Nanoscale

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A novel method to fabricate ultra-low reflective Si surfaces with nanoscale hierarchical structures is developed by the combination of AlOOH or boehmite nanoflakes nested on plasma-etched Si nanopillars. Using CF4 plasma etching, Si surfaces are nanostructured with pillar-like structures by selective etching with self-masking by fluorocarbon residues. AlOOH nanoflakes are formed by Al thin film coating with various thicknesses and subsequent immersion in boiling water, which induces the formation of nanoscale flakes through the hydrolysis reaction. AlOOH nanoflakes are formed on Si nanopillared surfaces for hierarchical structures, which are coated with a low-surface-energy material, resulting in a higher water wetting angle of over 150° and a very low contact angle hysteresis of less than 5°, and implying a self-cleaning surface. Reflectance reduced to 5.18% on average on hierarchical nanostructures in comparison to 9.63% on the Si nanopillar surfaces only. We found that Si nanopillars reduced reflection for wavelengths ranging from 200 to 1200 nm while AlOOH nanoflakes reduced reflection for wavelengths longer than 600 nm.

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Plasma Process. Polym. 5/2013

Cited by 2 publications

References 0 publications

Scratch‐Resistant Hydrophobic Coating with Supramolecular‐Polymer Co‐Assembly

Scratch‐Resistant Hydrophobic Coating with Supramolecular‐Polymer Co‐Assembly

Hierarchical structures of AlOOH nanoflakes nested on Si nanopillars with anti-reflectance and superhydrophobicity

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