Lopez-Torres, Diego, Elosua, Cesar, Hernaez, Miguel ORCID: https://orcid.org/0000-0001-7878-4704, Goicoechea, Javier and Arregui, Francisco J. (2015) From superhydrophilic to superhydrophobic surfaces by means of polymeric Layer-by-Layer films. Applied Surface Science, 351. pp. 1081-1086. ISSN 0169-4332
Full text not available from this repository.Abstract
In this paper a nanocoating that shows a superhydrophilic behavior (with a contact angle close to 0°) is transformed into a superhydrophobic nanofilm (whose contact angle is 165°) following a procedure that needs no nanoparticles to generate the nano-roughness required for superhydrophobicity. The superhydrophilic nanocoating was fabricated using poly (allylamine hydrochloride) (PAH) and poly (sodium phosphate) (PSP) combined by means of the Layer-by-Layer (LbL) technique. Seven different nanocoatings were constructed with different number of bilayers (4, 8, 12, 16, 20, 30 and 40) being the concentration of both polymers 10 −3 M. The analysis was conducted studying three different features: roughness, thickness and contact angle. The results show that initially, the contact angle of the nanofilms above 20 bilayers is close to 0°, that is, the minimum value for a superhydrophilic coating. These surfaces were functionalized using 1H,1H,2H,2H-Perfluorodecyltriethoxsilane to transform them into hydrophobic coatings by Chemical Vapor Disposition (CVD). Thereafter, the nanofilms showed a superhydrophobic behavior with a contact angle of 165° for the 40 bilayers films. The results of roughness and the images of AFM prove that the morphology of the nanocoating is preserved.
Item Type: | Article |
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Uncontrolled Keywords: | cvd technique,functionalized surfaces,hydrophilic and hydrophobic films,layer-by-layer,psp-pah,chemistry(all),condensed matter physics,physics and astronomy(all),surfaces and interfaces,surfaces, coatings and films ,/dk/atira/pure/subjectarea/asjc/1600 |
Faculty \ School: | Faculty of Science > School of Engineering (former - to 2024) Faculty of Science > School of Chemistry (former - to 2024) |
UEA Research Groups: | Faculty of Science > Research Groups > Materials, Manufacturing & Process Modelling |
Related URLs: | |
Depositing User: | LivePure Connector |
Date Deposited: | 09 Apr 2020 00:50 |
Last Modified: | 07 Nov 2024 12:42 |
URI: | https://ueaeprints.uea.ac.uk/id/eprint/74738 |
DOI: | 10.1016/j.apsusc.2015.06.004 |
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