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Abstract:
Graphene exhibits excellent shielding and impermeability, making it a superior filler for promising anticorrosion applications. However, unmodified graphene tends to aggregate, leading to structural defects and accelerated electrochemical corrosion of coatings. In this study, tetraphenylethene-poly(N-isopropylacrylamide) was developed by grafting poly(N-isopropylacrylamide) onto tetraphenylethene for use as an exfoliation agent and modifier. Low-defect modified graphene (TPG), comprising 2–3 layers of graphene flakes with excellent dispersion stability, was efficiently synthesized via microfluidization process. To prevent the electrochemical corrosion of coatings, a nacre-like bio-inspired graphene coating (B-TPG/EP) with alternating layers of epoxy resin (EP) and TPG/EP was designed and prepared using a spin-coating method. The results showed that after immersion in a 3.5 wt% NaCl solution for 42 days, the impedance value of B-TPG1%/EP composite coating remained at 1.04 × 1011 Ω cm2, which is two orders of magnitude higher than that of the TPG1%/EP composite coating and eight orders of magnitude higher than that of the EP coating, demonstrating excellent anti-corrosion performance. This study demonstrates a novel method for graphene modification, which is characterized by its simplicity and high efficiency in the preparation process. Simultaneously, inspired by biological principles, it develops a durable anti-corrosion coating for metals, which carries significant potential for industrial applications. © 2025
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Applied Surface Science
ISSN: 0169-4332
Year: 2025
Volume: 699
6 . 3 0 0
JCR@2023
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ESI Highly Cited Papers on the List: 0 Unfold All
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30 Days PV: 2
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