Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 10, Issue 21, Pages 18400-18415Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.8b01982
Keywords
cationic reduced graphene oxide; electrodeposition; self-alignment; corrosion protection; self-antibacterial
Funding
- Major Science and Technology Projects of Hunan Province, China [2015GK1004]
- Research Foundation of Education Bureau of Guizhou Province, China [Guizhou [2015]402]
- Joint Foundation of Science and Technology Department of Guizhou Province, China [Guizhou LH [2014]7430]
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The design and preparation of an excellent corrosion protection coating is still a grand challenge and is essential for large-scale practical application. Herein, a novel cationic reduced graphene oxide (denoted as RGO-ID+-based epoxy coating was fabricated for corrosion protection. RGO-ID+\ was synthesized by in situ synthesis and salification reaction, which is stable dispersion in water and epoxy latex, and the self-aligned RGO-ID+-treinforced cathodic electrophoretic epoxy nanocomposite coating (denoted as RGO-ID+ coating) at the surface of metal was prepared by electro-deposition. The self-alignment of RGO-ID+ in the coatings is mainly attributed to the electric field force. The significantly enhanced anticorrosion performance of RGO-ID+ coating is proved by a series of electrochemical measurements in different concentrated NaCl solutions and salt spray tests. This superior anticorrosion property benefits from the self-aligned RGO-ID+ nanosheets and the quaternary-N groups present in the RGO-ID+ nanocomposite coating. Interestingly, the RGO-ID+ also exhibits a high antibacterial activity toward Escherichia coli with 83.4 +/- 1.3% antibacterial efficiency, which is attributed to the synergetic effects of RGO-ID+ and the electrostatic attraction and hydrogen bonding between RGO-ID+ and E. coli. This work offers new opportunities for the successful development of effective corrosion protection and self-antibacterial coatings.
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