A corrosion-protective coating based on a solution-processable polymer-grafted graphene oxide nanocomposite. (September 2015)

• Record Type: Journal Article
• Authors: Qi, Kai; Sun, Yimin; Duan, Hongwei; Guo, Xingpeng
• Is Part Of: Corrosion science. Volume 98(2015)
• Page Start: 500
• Page End: 506
• Publication Date: 2015-09
• Subjects: A. Copper -- B. AFM -- B. SEM -- B. EIS -- C. Polymer coatings; Corrosion and anti-corrosives -- Periodicals; 620.11223
• DOI: 10.1016/j.corsci.2015.05.056
• Languages: English
• ISSNs: 0010-938X

Abstract

Highlights: Solution-processable polymer-grafted graphene nanocomposite is synthesized. The nanocomposite exhibits synergistic properties of both building blocks. The nanocomposite can be easily applied to form a protective coating on metals. The coating can effectively prevent corrosion of copper substrate. Abstract: A new type of solution-processable graphene coating has been synthesized by grafting polymethylmethacrylate (PMMA) brushes on graphene oxide (GO) via surface-initiated atom transfer radical polymerization (ATRP). One major finding is that the PMMA-grafted GO nanocomposite exhibits synergistic properties of both building blocks, i.e., permeation inhibition of GO and solubility of PMMA in a variety of solvents, which makes it compatible with commonly used coating methods to form uniform coatings with controlled thickness. Our results demonstrate that PMMA-grafted GO coating can effectively block charge transfer at the metal–electrolyte interface and prevent corrosion of the copper substrate under aggressive saline conditions.