等离子体炬对LDPE表面改性的研究
LDPE Surface Modifications Induced by Atmospheric Plasma Torches with Linear and Showerhead Configurations
摘要：
低密度聚乙烯（LDPE）表面等离子体改性，以改善其纳米结构和润湿性。这些改性可以显著改善后续层的沉积，例如具有特定阻隔性能的膜。为此，我们比较了两个大气等离子体炬与不同的配置（喷头与线性）引起的治疗。通过X射线光电子能谱、水接触角接触角测量和原子力显微镜观察，证实了LDPE膜在化学表面组成和表面形态方面的改性。两个后放电处理之间的比较是实现了几个火炬到基板的距离（间隙），处理时间，和氧气的流速方面的蚀刻速率，粗糙化率，氧气扩散到subsur-face和亲水性。通过将这些结果与放电后的化学组成相关联，我们识别并比较了负责化学表面功能化、表面粗糙化和蚀刻的物种。
英文摘要：
Low density polyethylene (LDPE) surfaces have been plasma modified to improve their nanostructural and wettability properties. These modifications can significantly improve the deposition of subsequent layers such as films with specific barrier properties. For this purpose, we compare the treatments induced by two atmospheric plasma torches with different configurations (showerhead vs. linear). The modifications of LDPE films in terms of chemical surface composition and surface morphology are evidenced by X-ray photoelectron spectro-scopy, water contact angles measurements, and atomic force microscopy. A comparison between the two post-discharge treatments is achieved for several torch-to-substrate distances (gaps), treatment times, and oxygen flow rates in terms of etching rate, roughening rate, diffusion of oxygen into the subsur-face and hydrophilicity. By correlating these results with the chemical composition of the post-discharges, we identify and compare the 'species which are responsible for the chemical surface functionalization, the surface roughening, and etching.
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