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Chitosan-sodium Alginate-based Coatings for Self-strengthening Anticorrosion and Antibacterial Protection of Titanium Substrate in Artificial Saliva by Yangyang Duan; You Wu; Ru Yan; Meng Lin; Shengjun Sun; Houyi Ma is a Materials Science article available to read on EtoBox.

What is Chitosan-sodium Alginate-based Coatings for Self-strengthening Anticorrosion and Antibacterial Protection of Titanium Substrate in Artificial Saliva about?

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 (ŋ) 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 Ca cations of the corrosive medium as a crosslinker by SEM and EDS analysis. Furthermore, the ŋ remained up to 96.8% after immersion o

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Author

Yangyang Duan; You Wu; Ru Yan; Meng Lin; Shengjun Sun; Houyi Ma

Publisher

Elsevier BV

Published

2021

Language

EN

Field

Materials Science (Physical Sciences)