Low-cost mussel inspired poly(catechol/polyamine) coating with superior anti-corrosion capability on copper

Junjie Wu; Chao Cai; Zhou Zhou; Hui Qian; Fanglin Zha; Jing Guo; Bing Feng; Tiexiang He; Ning Zhao; Jian Xu

doi:10.1016/j.jcis.2015.10.056

Low-cost mussel inspired poly(catechol/polyamine) coating with superior anti-corrosion capability on copper

J Colloid Interface Sci. 2016 Feb 1:463:214-21. doi: 10.1016/j.jcis.2015.10.056. Epub 2015 Oct 24.

Authors

Junjie Wu¹, Chao Cai², Zhou Zhou¹, Hui Qian¹, Fanglin Zha¹, Jing Guo², Bing Feng¹, Tiexiang He¹, Ning Zhao³, Jian Xu⁴

Affiliations

¹ Hunan Electric Power Corporation Research Institute, Changsha 410007, PR China.
² Beijing National Laboratory for Molecular Sciences, Laboratory of Polymer Physics and Chemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, PR China.
³ Beijing National Laboratory for Molecular Sciences, Laboratory of Polymer Physics and Chemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, PR China. Electronic address: zhaoning@icccas.ac.cn.
⁴ Beijing National Laboratory for Molecular Sciences, Laboratory of Polymer Physics and Chemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, PR China. Electronic address: jxu@iccas.ac.cn.

PMID: 26524257
DOI: 10.1016/j.jcis.2015.10.056

Abstract

A low-cost mussel inspired approach was developed to produce anti-corrosion coating on copper substrate. Catechol (CA) and polyamine (PA) were spontaneously polymerized to form adhesive coating of poly(cetechol/polyamine) (P(CA/PA)) onto copper surface and then P(CA/PA) was grafted by 1-dodecanethiol. The SEM, contact angle, XPS, FTIR and TG results demonstrated the formation of uniform, compact and thermal stable coatings through multiple interactions and chemically grafting. Electrochemical tests indicated of Cu-P(CA/PA)-SH possessed a highest corrosion potential of -81mV, a lowest corrosion current density of 0.15μA/cm(2), and a highest coating resistance of 57.19kΩcm(2), and also exhibit great long-term stability whether in solution immersion or salt spray tests. The remarkable anti-corrosion capability of Cu-P(CA/PA)-SH could be ascribed to the synergistic effect of the hydrophobicity, good stability, and strong wet adhesion of the mussel-inspired coating. This study provides an effective and cheap way for material protection and may give inspiration in the fields of material, biology and medicine relating to surface and interface engineering.

Keywords: Anti-corrosion; Catechol; Coating; Copper; Mussel; Polyamine.