氩等离子体射流对聚四氟乙烯表面改性的研究

发布时间：2018-12-16 01:33

【摘要】：采用氩等离子体射流对有机材料聚四氟乙烯(PTFE)进行表面改性,通过接触角测量、扫描电子显微镜(SEM)观察、X射线光电子能谱(XPS)和衰减全反射红外光谱(ATR-FTIR)分析,以及表面电阻率和沿面闪络电压等参量的测量,研究了等离子体射流处理前后PTFE的表面特性。实验结果表明:氩等离子体射流产生的粒子主要有OH、N*、Ar和少量的O。PTFE经大气压氩等离子体射流处理后,其表面水接触角下降,表面粗糙度变大,表面突起和裂痕显著增加,且表面有新的含氧基团生成;增加表面改性时间,表面改性效果会达到饱和状态;另一方面,表面改性后的PTFE存在微弱的老化效应,当在空气中放置10d后,其表面水接触角为66.2°,仍然低于表面处理前的值。由于等离子体改性使PTFE表面形态及化学成分发生变化,粗糙度增加,使PTFE表面电阻率降低,导致其沿面闪络电压升高。
[Abstract]:The surface modification of polytetrafluoroethylene (PTFE) was carried out by argon plasma jet. The contact angle was measured and the scanning electron microscope (SEM) was used to observe the surface of PTFE. X-ray photoelectron spectroscopy (XPS), attenuated total reflectance infrared spectroscopy (ATR-FTIR) and surface resistivity and flashover voltage measurements were used to study the surface characteristics of PTFE before and after plasma jet treatment. The experimental results show that the surface water contact angle decreases and the surface roughness increases after the treatment of argon plasma jet with OH,N*,Ar and a small amount of O.PTFE. The surface processes and cracks increased significantly, and new oxygen-containing groups were formed on the surface. When the time of surface modification is increased, the effect of surface modification will reach saturation state. On the other hand, the surface modified PTFE has a weak aging effect. When placed in air for 10 days, the surface water contact angle is 66.2 掳, which is still lower than the value before surface treatment. The surface morphology and chemical composition of PTFE were changed by plasma modification, the roughness increased, the surface resistivity of PTFE decreased and the flashover voltage increased.
【作者单位】：西安交通大学电力设备电气绝缘国家重点实验室;
【基金】：电力设备电气绝缘国家重点实验室资助项目(EIPE12308)
【分类号】：TM89

【参考文献】