聚丙烯薄膜的表面结构与驻极体性能相关性研究  

Study on the correlation between surface structure and electret property for polypropylene film

作　　者：陈智 陈钢进 饶成平 陈曦 李超 CHEN Zhi;CHEN Gangjin;RAO Chengping;CHEN Xi;LI Chao(Laboratory of Electret and Its Application, Hangzhou Dianzi University,Hangzhou 310018,China)

机构地区：[1]杭州电子科技大学驻极体及其应用实验室,杭州310018

出　　处：《功能材料》2017年第8期14-17,23,共5页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(51177032)

摘　　要：以聚丙烯颗粒为原料、表面纳米化石英玻璃为模板,通过热压法制得表面具有不同形貌的聚丙烯薄膜,再经电晕充电形成驻极体。采用原子力显微镜技术分析了薄膜的表面结构,并用表面电位跟踪和热刺激放电技术测试了不同表面结构聚丙烯薄膜的电荷存储性能。表面电位测试结果表明,其电荷存储性能与薄膜表面的微观结构密切相关,薄膜表面越粗糙,捕获电子的能力越强,但其电荷存储稳定性差异不大。热刺激放电技术测试结果表明,其陷阱能级与表面粗糙度无关。In this paper,polypropylene films with different surface topographies are prepared via hot pressing process by using polypropylene particles as raw material and surface nano-structured quartz glass as template.Then polypropylene electret film is formed by corona charging method.Atomic force microscopy is employed to analyze the film surface structure.Surface potential measurement and thermally stimulated discharge technique are employed to investigate the charge storage properties of polypropylene films with different surface structure.The surface potential measurement results display that the surface potential is closely related to the film surface micro-structure.The more rough the film surface,the stronger the ability to capture the electron.But the difference of charge storage stability is not distinctive.The thermally stimulating discharge technique experi-mental results reveal that the trap energy level has nothing to do with the surface roughness.

关 键 词：聚丙烯驻极体 表面微观结构 热刺激放电 电荷存储性能 

分 类 号：TQ317.6[化学工程—高聚物工业]