Issue 9, 2019

Novel nitrogen doped carbon dots enhancing the anticorrosive performance of waterborne epoxy coatings

Abstract

There are lots of research studies reporting the excellent performances of waterborne epoxy resin coatings to reduce environmental VOC levels. However, it has also been manifested that waterborne epoxy resin coatings do not have high corrosion resistance because of being hydrophilic. Herein, we utilized a kind of N doped carbon dot (N-CD) which has high ethanol solubility and low cytotoxicity to enhance the corrosion resistance of waterborne epoxy resin coatings as a nanofiller. The N-CDs were obtained through a solvothermal method by using 4-aminosalicylic acid (ASA) as a precursor. The diameter and height of N-CDs confirmed by scanning probe microscopy and transmission electron microscopy are 3–5 nm. Corrosion resistance performance of the coatings without and with N-CDs is investigated by electrochemical impedance spectroscopy by immersing them in 3.5 wt% NaCl (aq) for 70 days. The results indicate that the composite coatings with 0.5 wt% N-CDs show superior anticorrosive performance due to bond interactions between N-CDs and polymer chains, the defect repairing effect of N-CDs and the formation of compact Fe2O3 and Fe3O4 passivation layers.

Graphical abstract: Novel nitrogen doped carbon dots enhancing the anticorrosive performance of waterborne epoxy coatings

Supplementary files

Article information

Article type
Paper
Submitted
12 mar 2019
Accepted
08 iyl 2019
First published
09 iyl 2019
This article is Open Access
Creative Commons BY-NC license

Nanoscale Adv., 2019,1, 3443-3451

Novel nitrogen doped carbon dots enhancing the anticorrosive performance of waterborne epoxy coatings

J. Wang, P. Du, H. Zhao, J. Pu and C. Yu, Nanoscale Adv., 2019, 1, 3443 DOI: 10.1039/C9NA00155G

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