Abstract
In this paper, a novel multifunctional superamphiphobic coating for anticorrosion was successfully prepared on aluminum substrate via a simple spraying technique. Al2O3 nanoparticles were chemically grafted onto montmorillonite (MMT) nanosheets via coupling effect of NH2-C3H6-Si(OC2H5)3 (KH-550) and then modified by low surface energy material polydimethylsiloxane (PDMS). The ethylene tetrafluoroethylene (ETFE) composite coating with 25 wt% MMT/Al2O3-PDMS binary nanocomposite exhibited well-designed nano/μ structures and possessed superamphiphobicity with high contact angles towards water (164°), glycerol (158°) and ethylene glycol (155°). This coating demonstrated outstanding self-cleaning ability and strong adhesive ability (Grade 1 according to the GB/T 9286). The superhydrophobicity could be maintained after 8000 times abrasion or annealing treatment for 2 h under 350 °C. The coating still retained high water-repellence after immersion in 1 mol/L HCl (146°), 1 mol/L NaOH (144°) and 3.5 wt% NaCl (151°) solutions for 30 d. It should be noted that this superamphiphobic coating revealed excellent long-term corrosion protection with extremely low corrosion rate (4.3 × 10−3 μm/year) and high protection performance (99.999%) after 30 d immersion in 3.5 wt% NaCl solutions based on electrochemical corrosion measurements. It is believed that such integrated functional coating could pave new way for self-cleaning and anticorrosion applications under corrosive/abrasive environment.
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Acknowledgements
The research is financially supported by National Science Foundation of China (21507009, 21676052), Natural Science Foundation of Heilongjiang Province (B2016002, QC2015012) and Young Innovative Talent Training Program of Heilongjiang Province (UNPYSCT-2016083).
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Yuan, R., Wu, S., Wang, H. et al. Facile fabrication approach for a novel multifunctional superamphiphobic coating based on chemically grafted montmorillonite/Al2O3-polydimethylsiloxane binary nanocomposite. J Polym Res 24, 59 (2017). https://doi.org/10.1007/s10965-017-1222-7
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DOI: https://doi.org/10.1007/s10965-017-1222-7