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Protein adsorption, cell viability and corrosion properties of Ti6Al4V alloy treated by plasma oxidation and anodic oxidation
International Journal of Minerals, Metallurgy and Materials ( IF 4.8 ) Pub Date : 2020-09-05 , DOI: 10.1007/s12613-020-2020-5
Özgü Bayrak , Hojjat Ghahramanzadeh Asl , Ayşe Ak

The hardness, wettability, and electrochemical properties of Ti6Al4V alloy surfaces treated with anodic oxidation and plasma oxidation as well as the viabilities of the different cell lines on the obtained surfaces were investigated. The anodic oxidation was performed for 10 min under 100 V potential, and it resulted in a 0.95 µm thick nanoporous anatase-TiO2 structure. On the other hand, plasma oxidation was carried out at 650°C for 1 h and resulted in a dense rutile-TiO2 structure with a thickness of 1.2 µm. While a hardness of HV0.025 823 and roughness of ∼220 nm were obtained by plasma oxidation, those obtained by anodic oxidation were HV0.025 512 and ∼130 nm, respectively. The anodic oxidation process created a more hydrophilic surface with a contact angle of 87.2°. Both oxidation processes produced similar properties in terms of corrosion behavior and showed better resistance than the as-received state in a certain range of potential. Moreover, the surface treatments led to no significant change in the protein adsorption levels, which indicates that the difference in viability between the osteoblast and fibroblast cells was not due to the difference in surface protein adsorption. Given all the factors, the surfaces obtained by anodic oxidation treatment revealed higher cell viability than those obtained by plasma oxidation (p = 0.05).



中文翻译:

等离子体氧化和阳极氧化处理Ti6Al4V合金的蛋白质吸附,细胞活力和腐蚀性能

研究了经过阳极氧化和等离子体氧化处理的Ti6Al4V合金表面的硬度,润湿性和电化学性能,以及在所得表面上不同细胞系的活力。在100 V电压下进行10分钟的阳极氧化,得到0.95 µm厚的纳米孔锐钛矿型TiO 2结构。另一方面,在650℃下进行等离子氧化1小时,得到厚度为1.2μm的致密金红石-TiO 2结构。通过等离子体氧化获得的硬度为HV 0.025 823,粗糙度为〜220 nm,而通过阳极氧化获得的硬度为HV 0.025分别为512和〜130 nm。阳极氧化过程产生了更亲水的表面,接触角为87.2°。在一定的电位范围内,这两种氧化过程在腐蚀行为方面都产生了相似的特性,并表现出比原样状态更好的电阻。而且,表面处理没有引起蛋白质吸附水平的显着变化,这表明成骨细胞和成纤维细胞之间的生存力差异不是由于表面蛋白质吸附的差异引起的。考虑到所有因素,通过阳极氧化处理获得的表面比通过等离子体氧化获得的表面具有更高的细胞活力(p = 0.05)。

更新日期:2020-09-06
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