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Porous PEI coating for Copper ion storage and its controlled electrochemical release

Elmas, Sait and Gedefaw, Desta and Larsson, Mikael and Ying, Yanting and Cavallaro, Alex and Andersson, Gunther G. and Nyden, Magnus and Andersson, Mats R. (2020) Porous PEI coating for Copper ion storage and its controlled electrochemical release. Advanced Sustainable Systems, 4 (3). NA. ISSN 2366-7486

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Abstract

The use of copper‐based chemicals to prevent biological growth has been widely practiced in the past. However, leaching of the copper has increased concentrations in ports and marinas, posing a risk to marine life and the environment. It is therefore timely to develop a sustainable antibiofouling coating that could replace conventional copper‐based paints. Herein, the use of cross‐linked polyethylene imine (PEI) coated on conducting carbon cloth electrodes as a material that can absorb copper from seawater and allow for controlled electrochemical release of copper as a biocide to prevent biofouling is proposed. The results show that the porous coating can store and release copper ions over multiple cycles by passing only 1 mA cm−2 current density through the electrode in artificial seawater. This could enable a closed‐cycle, copper‐based antifouling coating, i.e., a coating that uses the well‐established biocidal activity of copper, but without any net release to the ocean.

Item Type: Journal Article
Subjects: Q Science > QD Chemistry
Divisions: Faculty of Science, Technology and Environment (FSTE) > School of Biological and Chemical Sciences
Depositing User: Desta Gedefaw
Date Deposited: 01 May 2020 11:39
Last Modified: 01 May 2020 11:39
URI: http://repository.usp.ac.fj/id/eprint/12033
UNSPECIFIED

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