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Preparation and Anticorrosion Performance of M-phenylenediamine-graphene Oxide/Organic Coating |
LUAN Hao1, MENG Fandi1( ), LIU Li1( ), CUI Yu2, LIU Rui3, ZHENG Hongpeng1, WANG Fuhui1 |
1.Shenyang National Laboratory for Materials Science, Northeastern University, Shenyang 110819, China 2.Shi -changxu Innovation Center for Advanced Materials, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China 3.Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China |
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Abstract In order to solve the problems of poor dispersion of graphene oxide (GO) in organic coatings and poor compatibility with resins, m-phenylenediamine, taking as the so called "bridge" material, was grafted on the surface of graphene oxide (GO) via a chemical means to obtain M-GO composite materials. Then the M-GO/epoxy resin E-44 composite anticorrosion coatings were also prepared. The results of FTIR, Raman and TGA showed that amine groups of m-phenylenediamine were successfully bonded with the epoxy group. A few layers of the M-GO composite particulates of lamellar morphology can be observed by transmission electron microscope (TEM), indicating that the dispersibility of GO was improved through m-phenylenediamine-grafting. On the other hand, the cross-sectional morphology of the coating showed that the M-GO composite material also has good compatibility with epoxy resin. In comparison with the epoxy resin coating GO/EP with the inherent graphene oxide GO, the M-GO/EP coating shows far more better anti-corrosion performance, namely, after 1000 h of immersion in 3.5% (mass fraction) NaCl solution, the impedance modulus (|Z|0.01 Hz) value of EP/M-GO stayed at 1.0×109 Ω·cm2, and after salt spray test for 12 d, the M-GO/EP coating could still provide effective protection for the metal substrate. The results show that the m-phenylenediamine modified graphene oxide/organic coatings present significantly enhanced anti-corrosion performance.
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Received: 24 December 2020
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Fund: National Natural Science Foundation of China(51901040);China Postdoctoral Science Foundation;Liao Ning Revitalization Talents Program(XLYC1807076) |
Corresponding Authors:
MENG Fandi,LIU Li
E-mail: fandimeng@mail.neu.edu.cn;liuli@mail.neu.edu.cn
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About author: LIU Li, E-mail: liuli@mail.neu.edu.cn MENG Fandi, E-mail: fandimeng@mail.neu.edu.cn
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