Kräuter Marianne, Tazreiter Martin, Perrotta Alberto, Coclite Anna Maria
Institute of Solid State Physics, NAWI Graz, Graz University of Technology, Petersgasse 16, 8010 Graz, Austria.
Macromolecules. 2020 Sep 22;53(18):7962-7969. doi: 10.1021/acs.macromol.0c01258. Epub 2020 Sep 11.
In this study, liquid droplets of 1-allyl-3-methylimidazolium dicyanamide have been processed by initiated chemical vapor deposition (iCVD) with a cross-linked polymer film consisting of (hydroxyethyl)methacrylate and ethylene glycol dimethacrylate to develop free-standing, ion-conductive membranes. We found that the obtained films are solids and have a conductivity of up to 18 ± 6 mS/cm, associated with the negatively charged counterion, indicating no loss of conductivity, compared to the ionic liquid in the liquid state. The membranes were conductive within a large process window and in air, thanks to the fact that the iCVD process does not affect the mobility of the anion in the ionic liquid. Furthermore, we demonstrate that varying the deposition conditions can influence the homogeneity and conductivity of the resulting membranes. The promising results of this study represent an important stepping stone on the way to novel ion-conductive membranes.
在本研究中，通过引发化学气相沉积（iCVD），用由甲基丙烯酸羟乙酯和乙二醇二甲基丙烯酸酯组成的交联聚合物膜对1-烯丙基-3-甲基咪唑二氰胺的液滴进行处理，以制备独立的离子导电膜。我们发现，所获得的膜为固体，其电导率高达18±6 mS/cm，这与带负电荷的抗衡离子有关，表明与液态离子液体相比，电导率没有损失。由于iCVD工艺不影响离子液体中阴离子的迁移率，这些膜在较大的工艺窗口内和空气中都具有导电性。此外，我们证明改变沉积条件会影响所得膜的均匀性和电导率。本研究的这些有前景的结果是通往新型离子导电膜道路上的重要一步。
