Superhydrophilic and underwater superoleophobic coatings on the basis of grafted polyelectrolytes on a textured aluminum
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Superhydrophilic and underwater superoleophobic coatings on the basis of grafted polyelectrolytes on a textured aluminum surface Evgeny Bryuzgin1 · Viktor Klimov1 · Yulia Tarasova1 · Elena Sprygina1 · Dmitry Nikolitchev2 · Alexander Navrotsky1 · Ivan Novakov1 Received: 11 July 2019 / Revised: 7 October 2019 / Accepted: 13 December 2019 © Springer-Verlag GmbH Germany, part of Springer Nature 2019
Abstract Water-loving compounds are usually used to prepare superhydrophilic and underwater superoleophobic surfaces. Hydrophilic polymers especially polyelectrolytes which contain the charged units in their structure is one of the perspective classes for the creation of materials with superhydrophilic properties. In this work, grafted polyelectrolytes based on quaternized N,N-dimethylaminoethyl methacrylate and sodium methacrylate were synthesized on the textured aluminum surface with an attached anchor layer (polyglycidyl methacrylate) and the initiator (2-bromo-2-methylpropionyl bromide) using surface-initiated atom transfer radical polymerization. The texturing of aluminum surface was performed using sequential etching in alkali and acid solutions. The lyophilic properties of grafted polyelectrolytes were studied by contact angle measurements using the “sessile drop” and “captive bubble” methods. The resulting coatings exhibit superhydrophilic properties due to quaternized ammonium and carboxyl charged groups in the grafted polyelectrolytes. Specifically, the coatings show complete wetting with water, stable aerophobicity and oleophobicity in aqueous media, and the demonstrated contact angles are greater than 170° for long contact times. It has been shown that grafting of polyelectrolytes prevents the sorption of nonpolar organic pollutants on the modified surface. Keywords Aluminum · Textured surface · Grafted polyelectrolytes · Superhydrophilicity · Underwater superoleophobicity Abbreviations AIBN Azo-bis-isobutyronitrile * Evgeny Bryuzgin [email protected] 1
Volgograd State Technical University, Lenin Avenue, 28, Volgograd, Russian Federation 400005
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N. I. Lobachevsky State University of Nizhny Novgorod, Gagarin Ave, 23, Nizhny Novgorod, Russian Federation 603950
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Polymer Bulletin
BMPB 2-Bromo-2-methylpropionyl bromide BP 2,2-Bipyridyl DMAP Dimethylaminopyridine GMA Glycidyl methacrylate GPC Gel permeation chromatography MEK Methyl ethyl ketone PE Polyelectrolyte PGMA Polyglycidyl methacrylate SEM Scanning electron microscopy SMA Sodium methacrylate SI-ATRP Surface-initiated atom transfer radical polymerization TEA Triethylamine TMAMS Trimethylmethacryloyloxyethylammonium methyl sulfate XPS X-ray photoelectron spectroscopy HLB Hydrophilic–lipophilic balance
Introduction Surface modification of solids with polymers is a relevant field for the development of materials science because the combination of characteristics of the substrate and modifier makes it possible to make materials with fundamentally new properties. Special attention is paid to the regulation of
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