等离子体电解氧化Ti6Al4V合金的多功能Ag/MWCNT/HA涂层：增强了种植体的电化学和抗菌性能

IF 5.3 2区材料科学 Q1 MATERIALS SCIENCE, COATINGS & FILMS

Surface & Coatings Technology Pub Date : 2025-04-04 DOI:10.1016/j.surfcoat.2025.132128

Mahendran Logesh, Han-Cheol Choe

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引用次数: 0

摘要

本研究研究了一种创新的Ti6Al4V牙种植体表面改性方法，该方法使用等离子体电解氧化（PEO）来创建包含羟基磷灰石（HA）、多壁碳纳米管（MWCNTs）和银纳米颗粒（Ag NPs）的多功能涂层。该研究旨在提高种植体的机械性能、耐腐蚀性和抗菌效果。在涂层中加入不同浓度的银纳米粒子以优化涂层性能。采用场发射扫描电镜（FESEM）、x射线衍射（XRD）和粗糙度测量等表面表征技术分析了涂层的形貌和成分。通过纳米压痕试验评估其力学性能。采用动电位极化（PDP）和电化学阻抗谱（EIS）评价了在0.9% NaCl环境下的腐蚀行为。对其抑菌活性进行了测试。结果表明，Ag/MWCNT/HA涂层显著改善了表面特性，最佳Ag NP浓度提高了涂层的耐腐蚀性（Rp = 3.25 × 1015 Ω.cm2）和抗菌性能。这种创新的涂层系统有望提高种植体的寿命和成功率。

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Multifunctional Ag/MWCNT/HA coatings on Ti6Al4V alloy via plasma electrolytic oxidation: Enhanced electrochemical and antibacterial properties for dental implants

This study investigates an innovative surface modification approach for Ti6Al4V dental implants using plasma electrolytic oxidation (PEO) to create a multifunctional coating incorporating hydroxyapatite (HA), multi-walled carbon nanotubes (MWCNTs), and silver nanoparticles (Ag NPs). The research aims to enhance the implant's mechanical properties, corrosion resistance, and antibacterial efficacy. Various concentrations of Ag NPs were integrated into the coating to optimize performance. Surface characterization techniques, including field-emission scanning electron microscopy (FESEM), X-ray diffraction (XRD) and roughness measurements, were employed to analyze the coating's morphology and composition. Mechanical properties were assessed through nanoindentation tests. Corrosion behavior was evaluated using potentiodynamic polarization (PDP) and electrochemical impedance spectroscopy (EIS) in 0.9 % NaCl environment. The antibacterial activity was tested against Escherichia coli. Results demonstrate that the Ag/MWCNT/HA coating significantly improves surface characteristics, with the optimal Ag NP concentration enhancing corrosion resistance (R_p = 3.25 × 10¹⁵ Ω.cm²) and antibacterial performance. This innovative coating system shows promise for improving the longevity and success rate of dental implants.

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来源期刊

Surface & Coatings Technology 工程技术-材料科学：膜

CiteScore

10.00

自引率

11.10%

发文量

921

审稿时长

19 days

期刊介绍： Surface and Coatings Technology is an international archival journal publishing scientific papers on significant developments in surface and interface engineering to modify and improve the surface properties of materials for protection in demanding contact conditions or aggressive environments, or for enhanced functional performance. Contributions range from original scientific articles concerned with fundamental and applied aspects of research or direct applications of metallic, inorganic, organic and composite coatings, to invited reviews of current technology in specific areas. Papers submitted to this journal are expected to be in line with the following aspects in processes, and properties/performance: A. Processes: Physical and chemical vapour deposition techniques, thermal and plasma spraying, surface modification by directed energy techniques such as ion, electron and laser beams, thermo-chemical treatment, wet chemical and electrochemical processes such as plating, sol-gel coating, anodization, plasma electrolytic oxidation, etc., but excluding painting. B. Properties/performance: friction performance, wear resistance (e.g., abrasion, erosion, fretting, etc), corrosion and oxidation resistance, thermal protection, diffusion resistance, hydrophilicity/hydrophobicity, and properties relevant to smart materials behaviour and enhanced multifunctional performance for environmental, energy and medical applications, but excluding device aspects.