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Study of plasma modified-PTFE for biological applications: relationship between protein resistant properties plasma treatment surface composition and surface roughness

机译：等离子改性PTFE在生物领域的研究：蛋白质抗性等离子处理表面成分和表面粗糙度之间的关系

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PTFE samples were treated by low-pressure, O2 RF plasmas. The adsorption of BSA was used as a probe for the protein resistant properties. The exposure of PTFE to an O2 plasma leads to an increase in the chamber pressure. OES reveals the presence of CO, CO2 and F in the gas phase, indicating a strong etching of the PTFE surface by the O2 plasma. Furthermore, the high resolution C1s spectrum shows the appearance of CF3, CF and C-CF components in addition to the CF2 component, which is consistent with etching of the PTFE surface. WCA as high as 160° were observed, indicating a superhydrophobic behaviour. AFM Images of surfaces treated at high plasma power showed a increase in roughness. Lower amounts of BSA adsorption were detected on high power, O2 plasma-modified PTFE samples compared to low power, oxygen plasma-modified ones.
机译：PTFE样品通过低压O2 RF等离子体处理。 BSA的吸附用作蛋白抗性的探针。 PTFE暴露于O2等离子体会导致腔室压力增加。 OES揭示了气相中CO，CO2和F的存在，表明O2等离子体对PTFE表面有很强的蚀刻作用。此外，高分辨率的C1s光谱显示除了CF2组分外，还有CF3，CF和C-CF组分的出现，这与PTFE表面的蚀刻一致。观察到WCA高达160°，表明其超疏水行为。在高等离子功率下处理过的表面的AFM图像显示粗糙度增加。与低功率，氧等离子体改性的样品相比，在高功率，O2等离子体改性的PTFE样品上检测到的BSA吸附量更低。

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