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通过等离子体电解氧化在钛表面形成的生物活性涂层：组成与性能

Bioactive Coatings Formed on Titanium by Plasma Electrolytic Oxidation: Composition and Properties.

作者信息

Mashtalyar Dmitry V, Nadaraia Konstantine V, Gnedenkov Andrey S, Imshinetskiy Igor M, Piatkova Mariia A, Pleshkova Arina I, Belov Evgeny A, Filonina Valeriia S, Suchkov Sergey N, Sinebryukhov Sergey L, Gnedenkov Sergey V

机构信息

Institute of Chemistry, Far Eastern Branch of the Russian Academy of Sciences, 690022 Vladivostok, Russia.

School of Biomedicine, Far Eastern Federal University, 690091 Vladivostok, Russia.

出版信息

Materials (Basel). 2020 Sep 16;13(18):4121. doi: 10.3390/ma13184121.

DOI:10.3390/ma13184121
PMID:32948063
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7560279/
Abstract

Bioactive coatings on VT1-0 commercially pure titanium were formed by the plasma electrolytic oxidation (PEO). A study of the morphological features of coatings was carried out using scanning electron microscopy. A composition of formed coatings was investigated using energy-dispersive spectroscopy and X-ray diffractometry analysis. It was shown that PEO-coatings have calcium phosphate in their composition, which increases the bioactivity of the surface layer. Electrochemical properties of the samples were studied by potentiondynamic polarization and electrochemical impedance spectroscopy in different physiological media: simulated body fluid and minimum essential medium. The data of electrochemical studies indicate more than 15 times decrease in the corrosion current density for the sample with coating (5.0 × 10 A/cm) as compared to the bare titanium (7.7 × 10 A/cm). The formed PEO-layers have elastoplastic properties close to human bone (12-30 GPa) and a lower friction coefficient in comparison with bare metal. The wettability of PEO-layers increased. The contact angle for formed coatings reduced by more than 60° in comparison with bare metal (from 73° for titanium to 8° for PEO-coating). Such an increase in surface hydrophilicity contributes to the greater biocompatibility of the formed coating in comparison with commercially pure titanium. PEO can be prospective as a method for improving titanium surface bioactivity.

摘要

通过等离子体电解氧化（PEO）在VT1-0工业纯钛上形成生物活性涂层。使用扫描电子显微镜对涂层的形态特征进行了研究。使用能量色散光谱和X射线衍射分析研究了形成涂层的成分。结果表明，PEO涂层的成分中含有磷酸钙，这增加了表面层的生物活性。通过动电位极化和电化学阻抗谱在不同生理介质（模拟体液和最低基本培养基）中研究了样品的电化学性能。电化学研究数据表明，与裸钛（7.7×10 A/cm）相比，有涂层样品的腐蚀电流密度降低了15倍以上（5.0×10 A/cm）。形成的PEO层具有接近人体骨骼的弹塑性性能（12-30 GPa），与裸金属相比摩擦系数更低。PEO层的润湿性增加。与裸金属相比，形成涂层的接触角降低了60°以上（从钛的73°降至PEO涂层的8°）。与工业纯钛相比，这种表面亲水性的增加有助于提高形成涂层的生物相容性。PEO作为一种改善钛表面生物活性的方法具有前景。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dbc1/7560279/3f57dac95365/materials-13-04121-g011.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dbc1/7560279/274ec4a6ac77/materials-13-04121-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dbc1/7560279/ab3ac15e73a3/materials-13-04121-g008.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dbc1/7560279/3f57dac95365/materials-13-04121-g011.jpg

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