期刊
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
卷 184, 期 -, 页码 109-117出版社
ELSEVIER
DOI: 10.1016/j.ijbiomac.2021.06.042
关键词
Titanium; Self-strengthening; Anticorrosion; Coating; Sodium alginate
资金
- Young Scholars Program of Shandong University
- National Natural Science Foundation of China [21673130]
- Natural Science Foundation of Shandong Province [ZR2019PH031]
In this study, a self-strengthening coating was successfully constructed using silver nanoparticles, chitosan, and sodium alginate, which exhibited enhanced corrosion resistance and antibacterial properties. The coating continuously strengthened in corrosive medium, showing high protection efficiency.
A self-strengthening coating with silver nanoparticles (Ag NPs) doped chitosan (CHI) and sodium alginate (SA) polyelectrolytes was constructed on the surface of polydopamine (PDA) coated Ti substrate by a layer-by-layer assembly method. The PDA coating exhibited an excellent bond with Ti substrate, and also can uniformly deposit Ag NPs via a mild method without introducing any exogenous reductant. The CHI coating was assembled through a spin-coating method for controlling Ag+ release. The SA was introduced to enhance the anticorrosion performance by forming calcium alginate (CA) in a corrosive medium. The corrosion protection was investigated with electrochemical impedance spectroscopy and polarization curves tests in fluorine-containing artificial saliva. During immersion, the charge-transfer resistance and the protection efficiency (LATIN SMALL LETTER ENG) presented a continuous increase with the immersion time, demonstrating that this coating possessed a remarkable self-strengthening capability, and the compositions of the outermost film changed from SA to CA with the Ca2+ cations of the corrosive medium as a crosslinker by SEM and EDS analysis. Furthermore, the LATIN SMALL LETTER ENG remained up to 96.8% after immersion of 30 days, and then the coating also displayed a distinct inhibition zone on S. mutans. These results prove this coating possesses an excellent anticorrosion performance and antibacterial property.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据