Surfaces and Interfaces ( IF 6.2 ) Pub Date : 2020-12-27 , DOI: 10.1016/j.surfin.2020.100900 Martin Kormunda , Petr Ryšánek , Pavlína Hájková , Eva Štěpanovská , Pavla Čapková , Jaroslav Pavlík
Present paper shows special benefits of low energy plasma treatment on PVDF electrospun nanofiber membrane, where the plasma power 120W has been applied between two flat electrodes creating homogeneous electric field. This experimental arrangement was crucial for two specific effects: (1) Surface activation took place by the scission of C-H bonds without defluorination (preserving the stronger C-F bonds) and consequently preserving the chains ordering and (2) Homogeneous electric field by low plasma power led to better chains ordering, higher degree of crystallinity and increase in the proportion of electroactive beta phase to almost the entire sample volume. This is a major difference from previous publications using higher plasma energies (240-500W) that report successful surface activation, but accompanied by defluorination, chain breaks and a decrease in the electroactive beta phase fraction.
中文翻译:
低能等离子体处理对电纺聚偏二氟乙烯膜表面化学和相组成的影响
本文显示了在PVDF电纺纳米纤维膜上进行低能等离子体处理的特殊优势,其中在两个平面电极之间施加了120W等离子体功率,从而产生了均匀的电场。这种实验安排对于两个特定的作用至关重要:(1)通过激活CH键断裂而不进行除氟(保留更强的CF键)来进行表面活化,并因此保留了链的有序性;(2)通过低等离子功率导致的均匀电场为了更好地实现链的有序性,更高的结晶度并增加电活性β相在几乎整个样品体积中所占的比例。这与以前使用较高等离子能量(240-500W)的出版物的主要区别在于,该出版物报道了成功的表面活化,但伴随有脱氟作用,