等离子体聚合聚环氧乙烷类涂层用于提高镁合金心血管支架抗腐蚀性能

doi:10.11896/cldb.19040174

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Abstract In this paper, in order to enhance the corrosion-resistance of MgZnMn alloy, plasma polymerization coatings were synthesized by using diethylene glycol dimethyl ether (diglyme) as organic monomer. Two kinds of an ultra-thin, pinhole-free with poly (ethylene oxide)-like (PEO-like) characteristics prepared with two different discharge power. X-ray photoelectron spectroscopy (XPS) and attenuated total internal reflection Fourier transform infrared spectroscopy (ATR-FTIR) results showed that, higher cross-linked structure formed when using high power (HPEO) than low power (LPEO). Electrochemical and in vitro immersion tests showed that two coatings had good anti-corrosion effect, especially the HPEO coating. The HPEO coating adhered well on the MgZnMn stent after the balloon expansion test, and significantly slowed down the degradation rate of the stent in the subsequent in vitro immersion test.

Key words： plasma-polymerization magnesium alloy degradation cardiovascular stent PEO-like

Published: 12 March 2020

CLC number:

TB34

Fund:This work was financially supported by the National Natural Science Foundation of China (31570957, 81330031).

About author:: Donghai Yuwas born in 1994. He is now pursuing his master degree at the School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, Sichuan. His research interest is the surface enginee-ring of blood-contacting biomedical devices; Nan Huangis a full professor at Southwest Jiaotong University. He received his master degree in materials science from Southwest Jiaotong University in 1985, and worked as a research fellow and guest professor in University of Erlangen, Germany and Rossendorf Research Center, Germany from 1989—1991 and 1998—1999 respectively. His research interests include surface and interface of biomaterials, biodegradable biomaterials, and cardiovascular devices. He is an inven-tor of a stent which has been applied in clinic.

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Cite this article:

YU Donghai,XIONG Kaiqin,HUANG Nan. Plasma Polymerized Poly (Ethylene Oxide)-like Coating for Enhancing Corrosion Resistance of Magnesium Alloy Cardiovascular Stents[J]. Materials Reports, 2020, 34(6): 6166-6171.

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http://www.mater-rep.com/EN/10.11896/cldb.19040174 OR http://www.mater-rep.com/EN/Y2020/V34/I6/6166

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