Sol-gel alumina coating of wired mesh packing

Aiouache, Farid and Abdelraouf, Mohamed and Hegarty, Josef and Rennie, Allan and Elizalde, Remi and Burns, Neil and Geekie, Louise and Najdanovic, Vesna (2020) Sol-gel alumina coating of wired mesh packing. Ceramics International, 46 (13). pp. 20777-20787. ISSN 0272-8842

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Abstract

Wired mesh packings have seen increasing applications to multiphase processes in recent years. Despite the high surface area, open structure and thermal and chemical resistance, wired 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 wired 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 Al2O3 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.

Item Type:
Journal Article
Journal or Publication Title:
Ceramics International
Additional Information:
This is the author’s version of a work that was accepted for publication in Ceramics International. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Ceramics International, 46, 13, 2020 DOI: 10.1016/j.ceramint.2020.05.043
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/2500/2504
Subjects:
ID Code:
143811
Deposited By:
Deposited On:
05 May 2020 10:25
Refereed?:
Yes
Published?:
Published
Last Modified:
23 Oct 2020 06:31