氩等离子体射流对聚四氟乙烯表面改性的研究

被引:15
作者
郝致远
汲胜昌
宋莹
机构
[1] 西安交通大学电力设备电气绝缘国家重点实验室
关键词
等离子体射流; 表面改性; 聚四氟乙烯; 水接触角; 闪络电压;
D O I
暂无
中图分类号
TM89 [高电压及大电流技术的应用];
学科分类号
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。
引用
收藏
页码:59 / 67
页数:9
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