Enhanced functional properties of CeO2 modified graphene/epoxy nanocomposite coating through interface engineering

Ying Qian; Wei Zheng; Wenge Chen; Tao Feng; Terence Xiaoteng Liu; Yong Qing Fu

doi:10.1016/j.surfcoat.2020.126819

Enhanced functional properties of CeO₂ modified graphene/epoxy nanocomposite coating through interface engineering

Ying Qian, Wei Zheng, Wenge Chen^*, Tao Feng, Terence Xiaoteng Liu, Yong Qing Fu^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

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Abstract

This paper reports significant enhancement of corrosion resistance and electrical properties of waterborne epoxy coatings through additions of ceria modified graphene. Results showed that ceria particles were uniformly distributed and covalently bonded onto the surface of graphene. A dense interface layer was formed between the ceria modified graphene and epoxy matrix by aliphatic ether bonds. The composite coating with a modified graphene content of 0.5 wt% exhibited the best corrosion resistance with the highest impedance modulus (e.g., 10³ Ω cm² for the damaged coating) and the lowest corrosion rate (e.g., 0.002 mm/year). The excellent corrosion resistance of the composite coating is related to the barrier effect of graphene and the inhibition effect of ceria on metal corrosion. Moreover, the coating showed a low percolation threshold of 0.231 vol% and its electrical conductivity reached 10⁻⁵ S/m when the content of modified graphene was 0.5 wt%.

Original language	English
Article number	126819
Pages (from-to)	1-13
Number of pages	13
Journal	Surface and Coatings Technology
Volume	409
Early online date	2 Jan 2021
DOIs	https://doi.org/10.1016/j.surfcoat.2020.126819
Publication status	Published - 15 Mar 2021

Keywords

Ceria
Conductivity
Corrosion resistance
Epoxy resin
Graphene

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10.1016/j.surfcoat.2020.126819

NRL_45382Accepted author manuscript, 2.02 MBLicence: CC BY-NC-ND

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title = "Enhanced functional properties of CeO2 modified graphene/epoxy nanocomposite coating through interface engineering",

abstract = "This paper reports significant enhancement of corrosion resistance and electrical properties of waterborne epoxy coatings through additions of ceria modified graphene. Results showed that ceria particles were uniformly distributed and covalently bonded onto the surface of graphene. A dense interface layer was formed between the ceria modified graphene and epoxy matrix by aliphatic ether bonds. The composite coating with a modified graphene content of 0.5 wt% exhibited the best corrosion resistance with the highest impedance modulus (e.g., 103 Ω cm2 for the damaged coating) and the lowest corrosion rate (e.g., 0.002 mm/year). The excellent corrosion resistance of the composite coating is related to the barrier effect of graphene and the inhibition effect of ceria on metal corrosion. Moreover, the coating showed a low percolation threshold of 0.231 vol% and its electrical conductivity reached 10−5 S/m when the content of modified graphene was 0.5 wt%.",

keywords = "Ceria, Conductivity, Corrosion resistance, Epoxy resin, Graphene",

author = "Ying Qian and Wei Zheng and Wenge Chen and Tao Feng and Liu, {Terence Xiaoteng} and Fu, {Yong Qing}",

note = "Funding Information: The authors would like to acknowledge the financial supports from Shaanxi Coal Industry Group United Fund of China (No. 2019JLM-2 ), Xi'an Science research project of China (No. 2020KJRC0089 ) and Electrical Materials and Infiltration Key Laboratory of Shaanxi Province Projects (No. 17JS080 ), Newton Mobility Grant ( IE161019 ) through Royal Society.",

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doi = "10.1016/j.surfcoat.2020.126819",

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T1 - Enhanced functional properties of CeO2 modified graphene/epoxy nanocomposite coating through interface engineering

AU - Qian, Ying

AU - Zheng, Wei

AU - Chen, Wenge

AU - Feng, Tao

AU - Liu, Terence Xiaoteng

AU - Fu, Yong Qing

N1 - Funding Information: The authors would like to acknowledge the financial supports from Shaanxi Coal Industry Group United Fund of China (No. 2019JLM-2 ), Xi'an Science research project of China (No. 2020KJRC0089 ) and Electrical Materials and Infiltration Key Laboratory of Shaanxi Province Projects (No. 17JS080 ), Newton Mobility Grant ( IE161019 ) through Royal Society.

PY - 2021/3/15

Y1 - 2021/3/15

N2 - This paper reports significant enhancement of corrosion resistance and electrical properties of waterborne epoxy coatings through additions of ceria modified graphene. Results showed that ceria particles were uniformly distributed and covalently bonded onto the surface of graphene. A dense interface layer was formed between the ceria modified graphene and epoxy matrix by aliphatic ether bonds. The composite coating with a modified graphene content of 0.5 wt% exhibited the best corrosion resistance with the highest impedance modulus (e.g., 103 Ω cm2 for the damaged coating) and the lowest corrosion rate (e.g., 0.002 mm/year). The excellent corrosion resistance of the composite coating is related to the barrier effect of graphene and the inhibition effect of ceria on metal corrosion. Moreover, the coating showed a low percolation threshold of 0.231 vol% and its electrical conductivity reached 10−5 S/m when the content of modified graphene was 0.5 wt%.

AB - This paper reports significant enhancement of corrosion resistance and electrical properties of waterborne epoxy coatings through additions of ceria modified graphene. Results showed that ceria particles were uniformly distributed and covalently bonded onto the surface of graphene. A dense interface layer was formed between the ceria modified graphene and epoxy matrix by aliphatic ether bonds. The composite coating with a modified graphene content of 0.5 wt% exhibited the best corrosion resistance with the highest impedance modulus (e.g., 103 Ω cm2 for the damaged coating) and the lowest corrosion rate (e.g., 0.002 mm/year). The excellent corrosion resistance of the composite coating is related to the barrier effect of graphene and the inhibition effect of ceria on metal corrosion. Moreover, the coating showed a low percolation threshold of 0.231 vol% and its electrical conductivity reached 10−5 S/m when the content of modified graphene was 0.5 wt%.

KW - Ceria

KW - Conductivity

KW - Corrosion resistance

KW - Epoxy resin

KW - Graphene

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ER -

Enhanced functional properties of CeO₂ modified graphene/epoxy nanocomposite coating through interface engineering

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