Sol-gel alumina coating of wire mesh packing

Abstract

Wire mesh packings have seen increasing applications to multiphase processes in recent years. Despite the high surface area, open structure and thermal and chemical resistance, wire mesh packings have a complex geometry which hinders some chemical applications, including changes of surface properties through application of a uniformly adhesive coating. In this work, the sol-gel deposition method of alumina coating ceramics was investigated for the first time on stainless steel wire mesh by using Dixon rings as example. The kinetics of deposition during the hydrolysis and polycondensation was followed for a range of initial composition of the coating such as the ratios of Al 2O 3 to water, acid content, polyethyleneimine binder content and the number of deposition cycles. Well-adhered alumina with a thickness up to 20 μm was successfully deposited. The molar ratios of acid to alumina and alumina to water of 0.25 and 0.01, respectively, 48 h of the aging time, 96 h of the mixing time and 2.1 g/L of polyethyleneimine binder formed a free of cracks coating of controlled thickness alumina on the Dixon rings.

Publication DOI: https://doi.org/10.1016/j.ceramint.2020.05.043
Divisions: College of Engineering & Physical Sciences
College of Engineering & Physical Sciences > School of Infrastructure and Sustainable Engineering > Chemical Engineering & Applied Chemistry
Additional Information: © 2020, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/
Uncontrolled Keywords: Alumina ceramics coating,Column packing,Dixon ring,Sol-gel,Stainless steel coating,Wire mesh coating,Electronic, Optical and Magnetic Materials,Ceramics and Composites,Process Chemistry and Technology,Surfaces, Coatings and Films,Materials Chemistry
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Related URLs: https://www.sci ... 272884220313286 (Publisher URL)
http://www.scop ... tnerID=8YFLogxK (Scopus URL)
PURE Output Type: Article
Published Date: 2020-09
Published Online Date: 2020-05-11
Accepted Date: 2020-05-01
Authors: Abdelraouf, Mohamed
Hegarty, Josef
Rennie, Allan
Elizalde, Rémi
Burns, Neil
Geekie, Louise
Najdanovic, Vesna (ORCID Profile 0000-0002-1035-0982)
Aiouache, Farid

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