Hofmann Andreas, Thißen Eva, Migeot Matthias, Bohn Nicole, Dietrich Stefan, Hanemann Thomas
Werkstoffkunde (IAM-WK), Institut für Angewandte Materialien, Karlsruher Institut für Technologie (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany.
Keramische Werkstoffe und Technologien (IAM-KWT), Institut für Angewandte Materialien, Karlsruher Institut für Technologie (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany.
Polymers (Basel). 2017 Oct 6;9(10):489. doi: 10.3390/polym9100489.
In this study, micron-sized pored membranes, based on the co-polymer polyvinylidene difluoride hexafluoropropylene (PVdF-HFP) were prepared via phase inversion techniques. The aim of the approach was to find less harmful and less toxic solvents to fabricate such films. Therefore, the Hansen solubility approach was used to identify safer and less toxic organic solvents for the phase inversion process, relative to present solvent mixtures, based on acetone, dimethyl formamide, dimethyl acetamide or methanol. With this approach, it was possible to identify cyclopentanone, ethylene glycol and benzyl alcohol as suitable solvents for the membrane preparation process. Physicochemical and mechanical properties were analyzed and compared, which revealed a uniform membrane structure through the cross section. Differences were observed at the top surface, in dependence of both preparation approaches, which are described in detail.
在本研究中，通过相转化技术制备了基于共聚物聚偏氟乙烯-六氟丙烯（PVdF-HFP）的微米级多孔膜。该方法的目的是找到危害性和毒性较小的溶剂来制备此类薄膜。因此，相对于目前基于丙酮、二甲基甲酰胺、二甲基乙酰胺或甲醇的混合溶剂，采用汉森溶解度方法来确定用于相转化过程的更安全、毒性更小的有机溶剂。通过这种方法，可以确定环戊酮、乙二醇和苯甲醇是适合膜制备过程的溶剂。对物理化学和机械性能进行了分析和比较，结果表明整个横截面具有均匀的膜结构。根据两种制备方法，在膜的顶面观察到了差异，并对此进行了详细描述。
