微波等离子体处理聚乙烯膜的表面结构分析

Surface Structural Analysis of Polyethylene Films Treated by Microwave Plasma

以ＥＳＣＡ和ＥＰＭＡ等为手段，探讨并比较了微波场下Ｎ２、Ｈｅ、ＣＯ２、Ｏ２、Ｈ２Ｏ及空气放电产生的等离子体对聚乙烯膜的表面改性与蚀刻作用。结果表明不同的等离子体处理均使样品表面引入化学形式相同但含量有所不同的含氧（－Ｃ－Ｏ－，－ＣＯ－Ｏ－）和含氮（－ＮＨ－，－ＮＨ２）极性基团，没有生成羰基（Ｃ＝Ｏ），并使样品受到不同程度的蚀刻；处理后的样品表面亲水性增强，其中以Ｎ２和Ｈｅ等离子体处理的样品亲水性提高较大；除样品表面生成了极性基团外，蚀刻作用亦是改善其亲水性的原因。

Surface structur alanalysis of polyethylene films treate by various microwave plasmas (N 2,He,CO 2,O 2,H 2O and air) are conducted and compared via ESCA and EPMA.The results show that all these plasmas treating all lead to incorporate oxygen-containing (C-O-,-CO-O-) and nitrogen containing (-NH2,-NH-) polar groups into samples' surface and etch the surfaces,which improve the samples' wettability.For different plasmas treating,since the capabilities of incorporating groups and the etching effect are all different,the resulting samples show different hydrophilic,too.Among these,the N 2 plasma- and the He plasma-treated samples show better hydrophilic than others.