Effect of Metal Ions on BSA Adsorption and Tribofilm Formation
Effect of Metal Ions on BSA Adsorption and Tribofilm Formation
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DOI：
10.1007/s11249-023-01721-8
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发表时间：
2023-03
影响因子：
3.2
通讯作者：
Heng Liu;Jiachen Chen;Jiayi Kuang;Yu Yan
中科院分区：
文献类型：
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作者：
Heng Liu;Jiachen Chen;Jiayi Kuang;Yu Yan
采用耗散石英晶体微天平（QCM-D）和摩擦腐蚀实验研究了Co离子和Cr离子对蛋白质吸附和摩擦膜形成的影响。在金属离子存在或不存在的情况下，蛋白质吸附均分为两个阶段，摩擦腐蚀后均产生摩擦膜。不同之处在于Co离子通过影响静电吸附来降低蛋白质的吸附。Cr离子增强疏水过程，促使蛋白质在金属表面上聚集，导致吸附增加。当添加/不添加Co离子时，在摩擦腐蚀测试之后，摩擦膜的尺寸（约10-20 μm）没有显著变化。而加入Cr离子后，摩擦腐蚀形成的摩擦膜尺寸明显增大（约70 μm）。这意味着Cr离子不仅增加了蛋白质的吸附，而且还促进了摩擦膜尺寸的增加。
The effects of Co ions and Cr ions on protein adsorption and tribofilm formation were studied by dissipative quartz crystal microbalance (QCM-D) and tribocorrosion experiments. In the presence or absence of metal ions, protein adsorption is all divided into two stages, and tribofilm is all produced after tribocorrosion. The difference is that Co ions reduce the adsorption of proteins by affecting electrostatic adsorption. Cr ions enhance the hydrophobic process, prompting protein aggregation on the metal surface, resulting in increased adsorption. When Co ions were added/not added, there was no significant change in the size of the tribofilm (about 10–20 μm) after tribocorrosion tests. However, after the addition of Cr ions, the size of the tribofilm formed by tribocorrosion was significantly increased (about 70 μm). This means that Cr ions not only increase the adsorption of proteins, but also promote the increase of the size of the tribofilm.