远程等离子体处理对聚四氟乙烯表面的功能化改性

采用远程氩等离子体对聚四氟乙烯(PTFE)膜进行了表面改性研究,通过接触角测定仪、扫描电子显微镜(SEM)和X射线光电子能谱仪(XPS)等手段,分析研究了改性后材料表面结构、性能的变化。结果表明:PTFE表面经远程氩等离子体处理后,表面微观形态和表面化学成分均发生了变化,且处理效果优于常规氩等离子体。远程氩等离子体可以在一定程度上抑制电子、离子的刻蚀作用,强化自由基反应,使材料表面获得更好的改性效果。经远程氩等离子体短时间(100s)处理后,PTFE表面的F/C比例从1.97降至1.44,O/C比例从0.015增至0.086;表面的水接触角从108°减小到53°;表面自由能从22.4×10-5N·cm-1增加至52.3×10-5N·cm-1。

Surface modification of poly(tetrafluoroethylene) films with remote plasma

Surface modification of poly(tetrafluoroethylene) (PTFE) films by remote argon plasma were studied. The surface properties were characterized by contact angle measurement, scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS). Results showed that the remote argon plasma treatment can modify the PTFE film surface in both morphology and composition more effectively than argon plasma. Moreover, remote plasma treatment can enhance the radical reaction and inhibit the etching reaction by electrons and ions. After the PTFE film surface was treated for 100 s by remote argon plasma, the F/C decreased from 1.97 to 1.44, the O/C increased from 0.015 to 0.086, the water contact angle decreased from 108° to 53°, and the surface free energy increased from 22.4×10~(-5) N·cm~(-1) to about 52.3×10~(-5) N·cm~(-1).