Kim Seung-Hyun, Park So-Jeong, Cho Chang-Yeol, Kang Hong Suk, Sohn Eun-Ho, Park In Jun, Ha Jong-Wook, Lee Sang Goo
Interface Materials and Chemical Engineering Research Center, Korea Research Institute of Chemical Technology Daejeon 34114 Republic of Korea
School of Chemical Engineering, Sungkyunkwan University Suwon 16419 Republic of Korea.
RSC Adv. 2019 Dec 4;9(69):40286-40291. doi: 10.1039/c9ra08763j. eCollection 2019 Dec 3.
The crystallinities of Ag-doped poly(vinylidene fluoride) (PVDF) films were modified by removing Ag using a novel washing process, which allowed control of the ratio of γ- and β-phases. The polarity of the composite film without Ag removal through the washing process reached 98%, and the β-phase content in the total electroactive phase was increased to 61%, according to Fourier-transform infrared spectroscopy. When Ag were removed through a process involving several cycles of washing, filtering, drying, and re-dissolving, the highest ratio of the γ-phase was increased to 67%, 28% higher than that before washing. This showed that Ag induced β-phase formation while Ag nanoparticles induced γ-phase formation, and that the ratio of γ- and β-phases in PVDF composite films can be controlled to suit specific applications by this washing process.
通过一种新颖的洗涤工艺去除银，对掺银聚偏氟乙烯（PVDF）薄膜的结晶度进行了改性，该工艺能够控制γ相和β相的比例。根据傅里叶变换红外光谱，未经洗涤工艺去除银的复合薄膜的极性达到98%，并且在总电活性相中β相含量增加到61%。当通过包括洗涤、过滤、干燥和重新溶解的几个循环的工艺去除银时，γ相的最高比例增加到67%，比洗涤前高28%。这表明银诱导β相形成，而银纳米颗粒诱导γ相形成，并且通过这种洗涤工艺可以控制PVDF复合薄膜中γ相和β相的比例以适应特定应用。
