TY - JOUR
T1 - Porous PEI Coating for Copper Ion Storage and Its Controlled Electrochemical Release
AU - Elmas, Sait
AU - Gedefaw, Desta A.
AU - Larsson, Mikael
AU - Ying, Yanting
AU - Cavallaro, Alex
AU - Andersson, Gunther G.
AU - Nydén, Magnus
AU - Andersson, Mats R.
PY - 2020/3
Y1 - 2020/3
N2 - 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.
AB - 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.
KW - antifouling coating
KW - biocide
KW - carbon cloth
KW - copper
KW - electrochemical water splitting
KW - porous PEI
UR - http://www.scopus.com/inward/record.url?scp=85078983317&partnerID=8YFLogxK
UR - http://purl.org/au-research/grants/arc/DP160102356
U2 - 10.1002/adsu.201900123
DO - 10.1002/adsu.201900123
M3 - Article
AN - SCOPUS:85078983317
SN - 2366-7486
VL - 4
JO - Advanced Sustainable Systems
JF - Advanced Sustainable Systems
IS - 3
M1 - 1900123
ER -