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The efficient exfoliation and dispersion of hBN nanoplatelets: advanced application to waterborne anticorrosion coatings

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Abstract

Although numerous papers have reported that graphene is a superior anticorrosion nanofiller, it has also been demonstrated that graphene cannot be used as a long-term anticorrosion barrier due to its essential high conductivity. Herein, an anticorrosive nanofiller (BNQDs@hBN) combining the nanomaterial boron nitride quantum dots (BNQDs) with insulating hexagonal boron nitride (hBN) is put forward. The homogeneous dispersion of BNQDs@hBN in an epoxy matrix was achieved with the assistance of BNQDs, and was based on strong π–π interactions between h-BN and BNQDs, as confirmed via UV-vis spectra. Embedding a small percentage of BNQDs@hBN in a waterborne epoxy (WEP) coating effectively improves the barrier properties of the coating by inhibiting the penetration of corrosive ions. Polarization tests revealed that the protection efficiency and corrosion rate of an epoxy coating with 0.5 wt% BNQDs@hBN were 99.99% and 6.482 × 10−5 mm year−1, respectively. Electrochemical impedance spectroscopy (EIS) results demonstrated that the 0.5 wt% BNQDs@hBN coating system showed a higher impedance modulus (>107) than that of a blank specimen after immersion for 60 days in 3.5 wt% NaCl(aq).

Graphical abstract: The efficient exfoliation and dispersion of hBN nanoplatelets: advanced application to waterborne anticorrosion coatings

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Publication details

The article was received on 22 Jun 2018, accepted on 25 Jul 2018 and first published on 26 Jul 2018


Article type: Paper
DOI: 10.1039/C8NJ03113D
Citation: New J. Chem., 2018, Advance Article
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    The efficient exfoliation and dispersion of hBN nanoplatelets: advanced application to waterborne anticorrosion coatings

    H. Zhao, J. Ding and H. Yu, New J. Chem., 2018, Advance Article , DOI: 10.1039/C8NJ03113D

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