聚酰亚胺薄膜的等离子体改性及其机理探究  

Plasma Modification of Polyimide Film and Its Mechanism

作　　者：张兴涛[1] 吴广宁[1] 吴旭辉[1] 雷毅鑫 ZHANG Xingtao;WU Guangning;WU Xuhui;LEI Yixin(College of Electrical Engineering,Southwest Jiaotong University,Chengdu 610031,China)

机构地区：[1]西南交通大学电气工程学院

出　　处：《高压电器》2019年第9期208-214,共7页High Voltage Apparatus

摘　　要：为了研究大气压空气介质阻挡放电(dielectric barrier discharge,DBD)对聚酰亚胺(polyimide,PI)薄膜的表面改性,文中首先利用搭建的介质阻挡放电平台测试了不同材料、不同气隙距离下的DBD电气特性及其放电图像,并获得了较为均匀的DBD放电模式。之后利用得到的等离子体对PI薄膜进行不同时间的处理,并测试了其接触角、表面能以及傅里叶红外光谱(fourier transform infrared spectroscopy,FTIR),揭示了等离子的作用机理。研究结果表明:相对于玻璃和环氧树脂,陶瓷作为阻挡介质时其放电更为均匀;随着陶瓷间气隙距离的增大,放电持续时间和放电均匀度均减小,但放电功率密度增大,较小的气隙距离更适合于聚合物的表面改性;随着等离子体处理时间的增加,PI薄膜表面的接触角减小,而表面能增加。研究发现,等离子体处理在PI薄膜表面引入的-OH、-NH2等极性亲水基团以及刻蚀造成的粗糙度增加是其亲水性和表面能增加的主要原因。To investigate the surface modification of polyimide(PI)film via dielectric barrier discharge(DBD)in air,a dielectric barrier discharge platform was built to measure the electrical characteristics of DBD of different materials under different air gap distances and to obtain corresponding discharge images,and a uniform DBD discharge mode was achieved.Then,PI films were treated with different time using the plasma,and the contact angle,surface energy and Fourier transform infrared spectra(FTIR)were measured.The action mechanism of plasma was also revealed.The results show that:1)ceramic barrier can achieve more uniform discharge than glass orepoxy resin barrier;2)with the increase of the air gap distance between ceramics,the duration and uniformity of discharge decrease,but the discharge power density is on the contrary,and smaller air gap distance is more suitable for polymer surface modification;3)with the increase of plasma treatment time,the contact angle of PI thin film decreases and the surface energy increases;and 4)the polar hydrophilic groups introduced to the surface of PI thin films,such as-OH and-NH2,as well as the increase of roughness caused by plasma etching,are the main reasons for the increase of hydrophilicity and surface energy of PI films.

关 键 词：介质阻挡放电 聚酰亚胺 不同材料 不同气隙距离 接触角 表面能 傅里叶红外光谱 

分 类 号：TQ323.7[化学工程—合成树脂塑料工业] TB383.2[一般工业技术—材料科学与工程] O646.9[理学—物理化学]