Self-alignment of cationic graphene oxide nanosheets for anticorrosive reinforcement of epoxy coatings
文献类型：期刊论文
| 作者 | Zhu, Xiaobo; Yan, Qingqing; Cheng, Li; Wu, Hao; Zhao, Haichao; Wang, Liping |
| 刊名 | CHEMICAL ENGINEERING JOURNAL
 |
| 出版日期 | 2020 |
| 卷号 | 389 |
| 关键词 | ENHANCED CORROSION PROTECTION HYBRID COATINGS STEEL PERFORMANCE ENVIRONMENT COMPOSITES RESISTANCE REDUCTION FILMS |
| DOI | 10.1016/j.cej.2020.124435 |
| 英文摘要 | Designing coatings with long term anticorrosion performance remains a great challenge. Herein, a newfangled cationic dopamine-reduced graphene oxide (DAGO(+)) nanosheet is prepared as a filler for epoxy coating via simple dopamine oxidative self-polymerization and ionization reaction. DRGO(+) can be dispersed stably in commercial water-based cathodic epoxy emulsion for more than 45 days without precipitation. Due to the presence of -NH3+ in DAGO(+), it can be self-aligned parallel arrangement in the composite coating (DRGO(+)/EP coating) under the electric field. This highly parallel DAGO(+) nanosheets tremendously improve the physical barrier effect of the coating and prolong the penetration path of the corrosive medium. Electrochemical impedance spectroscopy (EIS) test showed that the initial low-frequency impedance modulus of 0.5%-DRGO(+)/EP coating is as high as 4.79 x 10(10) Omega cm(2) when the content of DAGO(+) is 0.5 wt%, which is an order of magnitude higher than that of pure epoxy coating (4.07 x 10(9) Omega cm(2)), exhibiting extraordinary corrosion resistance. Finally, the protective mechanism of composite coating is revealed by the identification of corrosion products and local-EIS techniques. In view of the validity of DAGO(+), this work highlights the potential route for the large-scale preparation of coatings with superior long-term anti-corrosion. |
| 学科主题 | Engineering |
| 源URL | [http://ir.nimte.ac.cn/handle/174433/20777]  |
| 专题 | 2020专题 2020专题_期刊论文 |
| 作者单位 | 1.Zhao, HC 2.Wang, LP (corresponding author), Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Key Lab Marine Mat & Related Technol, Zhejiang Key Lab Marine Mat & Protect Technol, Ningbo 315201, Peoples R China. |
| 推荐引用方式 GB/T 7714 | Zhu, Xiaobo,Yan, Qingqing,Cheng, Li,et al. Self-alignment of cationic graphene oxide nanosheets for anticorrosive reinforcement of epoxy coatings[J]. CHEMICAL ENGINEERING JOURNAL,2020,389. |
| APA | Zhu, Xiaobo,Yan, Qingqing,Cheng, Li,Wu, Hao,Zhao, Haichao,&Wang, Liping.(2020).Self-alignment of cationic graphene oxide nanosheets for anticorrosive reinforcement of epoxy coatings.CHEMICAL ENGINEERING JOURNAL,389. |
| MLA | Zhu, Xiaobo,et al."Self-alignment of cationic graphene oxide nanosheets for anticorrosive reinforcement of epoxy coatings".CHEMICAL ENGINEERING JOURNAL 389(2020). |
入库方式： OAI收割
来源：宁波材料技术与工程研究所
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