中文摘要：

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。

英文摘要：

The surfaces of polythylene terephthalate（PET） were modified by oxygen ion bombardment at room temperature to improve the surface wettibility.The surface modified PET was characterized with X-ray photoelectron spectroscopy.The impacts of the surface modification conditions,including the pressure,incident angle of oxygen ion beam,and substrate temperature,on the PET wettibility were evaluated.The results show that the pressure of the oxygen ion beam significantly affects the microstructures,bond breaking,contents and wettibility of the PET.For instance,as the pressure increased,the oxygen content and ratio of C=O/C-O on the PET surfaces increased,and the contact angle of polar liquid like water decreased possibly because an increased oxygen ions reacted with surfaces.At 0.9 Pa,the surface oxygen content increased from 28% to 37%（at）;the ratio of C=O to C-O bonds increased from 1.13∶1 to 2.85∶1;and the water contact angle dropped from 55.3° to 7°,close to complete wetting.Possible mechanisms responsible for the surface reactions were also tentatively discussed.