Roll-to roll initiated chemical vapor deposition of super hydrophobic thin films on large-scale flexible substrates

Date

2020-04-01

Author

Sakalak, Huseyin
YIlmaz, KurtuluS
Gürsoy, Mehmet
Karaman, Mustafa

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This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

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In this study, a large-scale roll-to-roll initiated chemical vapor deposition (iCVD) system was developed to allow for coating superhydrophobic thin films on flexible substrates. Poly(hexafluorobutyl acrylate), which possesses a short fluorinated side-chain, was chosen as the hydrophobic finish material, while a commercial porous bamboo fabric was used as the flexible substrate. After iCVD coating, bamboo surface, which is superhydrophilic by its nature, transformed into a superhydrophobic with a water contact angle of 156 degrees without changing its porous and flexible structure. Similar hydrophobic properties were observed against various daily liquids. Complete coverage of as-deposited films on both sides of bamboo surfaces was observed at very high roll speeds up to 225 mm/min, which allow coatings on 20 m(2) flexible substrates in a single run. Large scale contact angle and chemical uniformity of coatings on fabric surfaces were evaluated using contact angle and XPS analyses. (C) 2019 Elsevier Ltd. All rights reserved.

URI

https://hdl.handle.net/11511/116274

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Department of Metallurgical and Materials Engineering, Article