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This study reports a new strategy for providing epoxy coatings with enhanced barrier protection mechanisms. For this purpose, covalent modification of graphene oxide with 3-aminopropyltrimethoxysilane (APTMS-GO) made it easy to achieve a homogenous dispersion in an epoxy matrix. The stable dispersion of APTMS-GO was examined by TEM, SEM and XRD. Embedding a small percentage of well-dispersed APTMS-GO nanosheets (2.0 wt.%) in the epoxy coating remarkably improved anticorrosion performance. The electrochemical impedance spectroscopy (EIS), water contact angles and SEM revealed that the barrier performance of the epoxy coating was improved after addition of 2.0 wt.% APTMS-GO nanosheets to the epoxy coating sample, which was attributed to the well-dispersed APTMS-GO nanosheets in the epoxy matrix.
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Feng et al. (2018) studied this question.
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