A Solution-Processable, Nanostructured, and ConductiveGraphene/Polyaniline Hybrid Coating for Metal-Corrosion Protection andMonitoring

Collection with item attached
2017
Item details URL
http://open-repository.kisti.re.kr/cube/handle/open_repository/474025.do
DOI
10.1038/s41598-017-15552-w
Title
A Solution-Processable, Nanostructured, and ConductiveGraphene/Polyaniline Hybrid Coating for Metal-Corrosion Protection andMonitoring
Description
This research was supported by the Basic Science Research Program(NRF-2015R1A2A2A01007166) and the Brain Research Program(NRF-2016M3C7A1905384) through the National Research Foundation of Korea(NRF); the Korea Health Technology R&D Project (HI16C0950) through theKorea Health Industry Development Institute; and the KRIBB InitiativeResearch Program.
abstract
A smart and effective anticorrosive coating consisting of alternating graphene and polyaniline (PANI) layers was developed using top-down solution processing. Graphite was exfoliated using sonication assisted by polyaniline to produce a nanostructured, conductive graphene/polyaniline hybrid (GPn) in large quantities (>0.5 L of 6 wt% solution in a single laboratory-scale process). The GPn was coated on copper and exhibited excellent anticorrosion protection efficiencies of 46.6% and 68.4% under electrochemical polarization in 1 M sulfuric acid and 3.5 wt% sodium chloride solutions, chosen as chemical and seawater models, respectively. Impedance measurements were performed in the two corrosive solutions, with the variation in charge transfer resistance (R-ct) over time indicating that the GPn acted as an efficient physical and chemical barrier preventing corrosive species from reaching the copper surface. The GPn-coated copper was composed of many PANI-coated graphene planes stacked parallel to the copper surface. PANI exhibits redox-based conductivity, which was facilitated by the high conductivity of graphene. Additionally, the GPn surface was found to be hydrophobic. These properties combined effectively to protect the copper metal against corrosion. We expect that the GPn can be further applied for developing smart anticorrosive coating layers capable of monitoring the status of metals.
provenance
Made available in Cube on 2018-09-28T10:35:13Z (GMT). No. of bitstreams: 0
language
English
author
Kim, Saerona
Thanh-Hai Le
Park, Chul Soon
Park, Geunsu
Kim, Kyung Ho
Kim, Semin
Kwon, Oh Seok
Lim, Gyun Taek
Yoon, Hyeonseok
orcid
Yoon, Hyeonseok/0000-0002-5403-1617
accessioned
2018-09-28T10:35:13Z
available
2018-09-28T10:35:13Z
issued
2017
citation
SCIENTIFIC REPORTS(7)
issn
2045-2322
uri
http://open-repository.kisti.re.kr/cube/handle/open_repository/474025.do
Funder
과학기술정보통신부
Funding Program
한국생명공학연구원연구운영비지원
Project ID
1711063678
Jurisdiction
Rep.of Korea
Project Name
Development of Nanobiomedical Convergence Technology
rights
openAccess
type
article


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