期刊
SURFACE & COATINGS TECHNOLOGY
卷 317, 期 -, 页码 1-9出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.surfcoat.2017.03.050
关键词
Epoxy; Amino-Silane; Graphene oxide; Nanocomposite coating; Corrosion protection
Epoxy coatings containing graphene oxide (GO) and amino-silane modified GO (A-GO) with various weight fractions (0.05, 0.1, 03, and 0.5 wt%) are prepared to investigate the effect of silane modified GO on performance of nanocomposite coatings. (3-Aminopropyl) triethoxysilane (APTES) is used as organosilane for A-GO synthesis.AGO is characterized by FTIR, XRD, FE-SEM, and EDS. The dispersion quality of nanosheets in epoxy coating is examined by FE-SEM, revealing the interfacial interaction of GO in coating has improved via silane modification. Besides, the pull-off adhesion strength of epoxy coating to substrate increases by about two times via adding A-GO. The results of electrochemical impedance spectroscopy show that epoxy/A-GO coatings can provide superior corrosion protection performance and maximum corrosion resistance is achieved via adding 0.1 wt% A-GO. By increasing the loading of A-GO, the barrier properties decrease due to agglomeration of nanosheets in polymer matrix. (C) 2017 Elsevier B.V. All rights reserved.
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