期刊
ACS APPLIED MATERIALS & INTERFACES
卷 9, 期 39, 页码 34294-34304出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.7b08325
关键词
graphene; polypyrrole; synergistic effect; self-healing; corrosion protection
资金
- Chinese Academy of Sciences [Y60707WR04]
- Natural Science Foundation of Zhejiang Province [Y16B040008]
- Frontier Sciences of the Chinese Academy of Sciences [QYZDY-SSW-JSC009]
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 inter-calators and ultrasonic vibration. On the basis of pi-pi 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.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据