【摘 要】
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In this study,MgAl-V2O74-LDHs/(poly(ethyleneimine)(PEI)/MXene)n composite films were synthesized via(i) in-situ hydrothermal growth of Mg-Al layered double hydroxides (LDHs) on AZ31 alloy followed by vanadate intercalation reactions,and (ii) the as-prepar
【机 构】
：
State Key Laboratory of Mechanical Transmission,College of Materials Science and Engineering,Chongqi
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In this study,MgAl-V2O74-LDHs/(poly(ethyleneimine)(PEI)/MXene)n composite films were synthesized via(i) in-situ hydrothermal growth of Mg-Al layered double hydroxides (LDHs) on AZ31 alloy followed by vanadate intercalation reactions,and (ii) the as-prepared MgAl-V2O74-LDHs film was covered by layer-by-layer assembly using (PEI/MXene)n,where n=5,10,and 20.Film characterization revealed that the outer layers (PEI/MXene) were assembled on the surface by electrostatic interaction and provided a good coverage of LDHs nanosheets.But,microcracks appeared gradually on the surface and destroyed the film integrity with increasing number of PEI/MXene layers.The corrosion tests indicated that the MgAl-V2O74-LDHs/(PEI/MXene)10 composite films provided a better corrosion protection ability than that of n=5 and 20.The outer layers (PEI/MXene) had a corrosion inhibition protective effect on MgAl-V2O74-LDHs film.This work opened a new perspective of the MXene materials for anticorrosion application via a layer-by-layer assembly method.
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