标题:Biocorrosion resistance and biocompatibility of Mg-Al layered double hydroxide/poly(L-lactic acid) hybrid coating on magnesium alloy AZ31
作者:Sun X.; Yao Q.-S.; Li Y.-C.; Zhang F.; Zeng R.-C.; Zou Y.-H.; Li S.-Q.
作者机构:[Sun, X] Corrosion Laboratory for Light Metals, College of Materials Science and Engineering, Shandong University of Science and Technology, Qingdao, 更多
通讯作者:Zhang, F(zhangfen2011@hotmail.com)
通讯作者地址:[Zhang, F] Corrosion Laboratory for Light Metals, College of Materials Science and Engineering, Shandong University of Science and Technology, Corrosi 更多
来源:Frontiers of Materials Science
出版年:2020
DOI:10.1007/s11706-020-0522-8
关键词:biocompatibility; corrosion resistance; layered double hydroxide; magnesium alloy; poly(L-lactic acid)
摘要:A Mg-Al layered double hydroxide (Mg-Al-LDH) coating was firstly synthesized via an in-situ steam coating growth method on the AZ31 Mg alloy, and then was modified with poly(L-lactic acid) (PLLA) via dipping and vacuum freeze-drying. The microstructure and composition of LDH/PLLA hybrid coating were analyzed by XRD, SEM, EDS and FT-IR. The biocorrosion behavior of hybrid coating was evaluated by potentiodynamic polarization, electrochemical impedance spectroscopy (EIS) and hydrogen evolution test in the Hank’s solution. The results showed that LDH/PLLA coatings exhibited a much dense layer compared to the unmodified Mg-Al-LDH coating with unobvious boundary between PLLA and LDH coatings. The corrosion current density of the LDH/PLLA-10 hybrid coating decreased three orders of magnitude in comparison to its substrate. It was proven that the existence of the PLLA coating further prolonged the service life of the Mg-Al-LDH coating. What’s more, the MTT assay and live/dead staining showed that the LDH/PLLA-10 coating had good biocompatibility for Mouse NIH3T3 fibroblasts. The formation mechanism and the anti-corrosion mechanism of hybrid coatings were proposed. © 2020, Higher Education Press.
收录类别:SCOPUS
资源类型:期刊论文
原文链接:https://www.scopus.com/inward/record.uri?eid=2-s2.0-85091732078&doi=10.1007%2fs11706-020-0522-8&partnerID=40&md5=2e481a14bd28d193963c262392365608
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