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利用直流离子源产生氧离子束并在室温条件下与PET表面进行相互作用。通过X光电子能谱仪、接触角测试仪等表征技术,分析氧离子束工作压强对PET表面化学组分、化学键结构,以及对极性H2O分子液体的静态接触角等性能的影响。研究结果表明,当氧离子束与PET表面相互作用时,PET表面的C-O、C-H键首先被破坏,氧离子与C-垂悬键结合形成C-O或C=O极性键。随着氧离子束工作压强的增加,更多的氧离子与PET表面相互作用,导致处理后的PET表面含氧量增加,C=O/C-O比例增加,对极性H2O分子液体侵润性增强。当氧离子束工作压强增加至0.9 Pa时,处理后的PET表面氧元素相对百分比含量由纯PET的28%增加至37%(原子比),C=O/C-O键比例由纯PET的1.13∶1增加至2.85∶1,而极性H2O分子液体的静态接触角由纯PET的55.3°减低至7.0°,接近于完全润湿。上述结果表明,氧离子束是一种有效调节PET表面化学组分、化学键结构、及表面性质的简单而有效的方法。
A DC ion source was used to generate an oxygen ion beam and interact with the PET surface at room temperature. The effects of working pressure of oxygen ion beam on the chemical composition, chemical bond structure and the static contact angle of polar H2O liquid were analyzed by X-ray photoelectron spectroscopy and contact angle tester. The results show that when the oxygen ion beam interacts with the PET surface, the C-O and C-H bonds on the surface of the PET are firstly destroyed, and the oxygen ions and C-dangling bonds combine to form C-O or C = O polar bonds. As the working pressure of oxygen ion beam increases, more oxygen ions interact with the PET surface, resulting in an increase of the oxygen content of the treated PET surface, an increase of the C = O / CO ratio and an increase of the liquid invasion to the polar H2O molecule . When the working pressure of oxygen ion beam increased to 0.9 Pa, the relative content of oxygen in treated PET surface increased from 28% of pure PET to 37% (atomic ratio), the ratio of C═O / CO bond was 1.13: 1 to 2.85: 1, while the static contact angle of polar H2O molecular liquid decreased from 55.3 ° of pure PET to 7.0 °, close to complete wetting. The above results show that the oxygen ion beam is a simple and effective method to effectively adjust the surface chemical composition, chemical bond structure and surface properties of PET.