常压共面介质阻挡放电对聚乙烯隔膜表面改性研究  

Surface Modification of Polyethylene Membrane by Coplanar Dielectric Barrier Discharge Plasma in Atmospheric Pressure

作　　者：袁娜娜 马雪飞 李妍 丁可[1] 王超梁[1] 张菁[1] YUAN Nana;MA Xuefei;LI Yan;DING Ke;WANG Chaoliang;ZHANG Jing(College of Science,Donghua University,Shanghai 201620,China)

机构地区：[1]东华大学理学院,上海201620

出　　处：《真空科学与技术学报》2021年第1期89-94,共6页Chinese Journal of Vacuum Science and Technology

基　　金：中央高校基本科研业务费专项资金资助项目(2232019A3-12);国家自然科学基金委员会资助项目(12075054)。

摘　　要：共面介质阻挡放电是工业上非常有发展前景的材料表面处理技术,采用常压CDBD在六甲基二硅氧烷(HMDSO)/O_(2)/Ar混合气氛中产生低温等离子体,动态连续对聚乙烯(PE)隔膜进行表面改性,通过扫描电镜、衰减全反射傅里叶红外变换光谱、X射线光电子能谱、水接触角和热收缩率测量分析,研究了常压等离子体处理前后PE隔膜的表面结构和性能的变化。结果表明,在较低的放电功率和短时间的等离子体处理下,PE隔膜表面沉积了SiO_(x)C_(y)H_(z)纳米颗粒薄膜,纳米颗粒沿着纤维呈絮状沉积,并不堵塞隔膜孔隙,同时引入Si(CH_(3))_(x)、Si-OH、COOH和C-OH等基团,极大地提升了PE隔膜表面润湿性和耐热性能,隔膜的热收缩率最低为0.5%,水接触角为24.4°。The surfaces of polyethylene(PE) membrane,a good separator material in Li-ion battery,were modified with low temperature HMDSO/O_(2)/Ar plasma,generated by atmospheric pressure coplanar dielectric barrier discharge(CDBD) actuator.The microstructures and properties of the modified PE surfaces were characterized with scanning electron microscopy,attenuated total reflection Fourier transform infrared spectroscopy,X-ray photoelectron spectroscopy,water contact-angle and thermal shrinkage measurements.The results show that the plasma irradiation matters.Specifically,irradiated by the short period low power plasma,the layer of flocculent SiO_(x)C_(y)H_(z) nano-particle coexisted with the randomly distributed radicals,including the Si(CH_(3))_(x),Si-OH,COOH and C-OH groups,on the highly porous fiber network of PE-substrate,resulting in a significant improvement of the wettability and thermal resistance.For example,the PE surfaces had the lowest thermal surface shrinkage ratio of 0.5% and a water contact angle of 24.4°.

关 键 词：共面介质阻挡放电 低温等离子体 聚乙烯隔膜 润湿性 耐热收缩性 

分 类 号：O539[理学—等离子体物理]