1. Porous PEI Coating for Copper Ion Storage and Its Controlled Electrochemical Release.
- Author
-
Elmas, Sait, Gedefaw, Desta A., Larsson, Mikael, Ying, Yanting, Cavallaro, Alex, Andersson, Gunther G., Nydén, Magnus, and Andersson, Mats R.
- Subjects
ETHYLCELLULOSE ,COPPER ions ,ARTIFICIAL seawater ,SURFACE coatings ,CARBON electrodes ,MARINE biology - 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. [ABSTRACT FROM AUTHOR]
- Published
- 2020
- Full Text
- View/download PDF