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Qiu S, Li W, Zheng W, et al. Synergistic Effect of Polypyrrole-Intercalated Graphene for Enhanced Corrosion Protection of Aqueous Coating in 3.5% NaCl Solution. ACS Appl Mater Interfaces. 2017;9(39):34294-34304doi: 10.1021/acsami.7b08325.
Qiu, S., Li, W., Zheng, W., Zhao, H., & Wang, L. (2017). Synergistic Effect of Polypyrrole-Intercalated Graphene for Enhanced Corrosion Protection of Aqueous Coating in 3.5% NaCl Solution. ACS applied materials & interfaces, 9(39), 34294-34304. https://doi.org/10.1021/acsami.7b08325
Qiu, Shihui, et al. "Synergistic Effect of Polypyrrole-Intercalated Graphene for Enhanced Corrosion Protection of Aqueous Coating in 3.5% NaCl Solution." ACS applied materials & interfaces vol. 9,39 (2017): 34294-34304. doi: https://doi.org/10.1021/acsami.7b08325
Qiu S, Li W, Zheng W, Zhao H, Wang L. Synergistic Effect of Polypyrrole-Intercalated Graphene for Enhanced Corrosion Protection of Aqueous Coating in 3.5% NaCl Solution. ACS Appl Mater Interfaces. 2017 Oct 04;9(39):34294-34304. doi: 10.1021/acsami.7b08325. Epub 2017 Sep 21. PMID: 28914046.
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ACS Appl Mater Interfaces. 2017 Oct 04;9(39):34294-34304. doi: 10.1021/acsami.7b08325. Epub 2017 Sep 21.

Synergistic Effect of Polypyrrole-Intercalated Graphene for Enhanced Corrosion Protection of Aqueous Coating in 3.5% NaCl Solution.

ACS applied materials & interfaces

Shihui Qiu, Wei Li, Wenru Zheng, Haichao Zhao, Liping Wang

Affiliations

  1. Key Laboratory of Marine Materials and Related Technologies, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences , Ningbo 315201, P. R. China.
  2. Faculty of Materials Science and Chemical Engineering, Ningbo University , Ningbo 315211, P. R. China.

PMID: 28914046 DOI: 10.1021/acsami.7b08325

Abstract

Dispersion of graphene in water and its incorporation into waterborne resin have been rarely researched and hardly achieved owing to its hydrophobicity. Furthermore, it has largely been reported that graphene with impermeability contributed to the improved anticorrosion property. Here, we show that highly concentrated graphene aqueous solution up to 5 mg/mL can be obtained by synthesizing hydrophilic polypyrrole (PPy) nanocolloids as intercalators and ultrasonic vibration. On the basis of π-π interaction between PPy and graphene, stacked graphene sheets are exfoliated to the thickness of three to five layers without increasing defects. The corrosion performance of coatings without and with PPy and graphene is obtained by potential and impedance measurements, Tafel curves, and fitted pore resistance by immersing in a 3.5 wt % NaCl solution. It turns out that composite coating with 0.5 wt % graphene additive exhibits superior anticorrosive ability. The mechanism of intercalated graphene-based coating is interpreted as the synergistic protection of impermeable graphene sheets and self-healing PPy and proved by the identification of corrosion products and the scanning vibrating electrode technique.

Keywords: corrosion protection; graphene; polypyrrole; self-healing; synergistic effect

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