Polyimide/ionic liquid composite membranes for middle and high temperature fuel cell application: water sorption behavior and proton conductivity was written by Fatyeyeva, Kateryna;Rogalsky, Sergiy;Makhno, Stanislav;Tarasyuk, Oksana;Puente, Jorge Arturo Soto;Marais, Stephane. And the article was included in Membranes (Basel, Switzerland) in 2020.Name: 1-Methyl-1H-imidazol-3-ium chloride This article mentions the following:
Four water insoluble room-temperature protic ionic liquids (PILs) based on the N-alkylimidazoliumcation with the alkyl chain length from 1 to 4 and bis(trifluoromethylsulfonyl)imide anion were synthesized and their chem. structure was confirmed by the 1H NMR and 19F NMR anal. PILs were revealed to be thermally stable up to 360 and 400掳C. At the same time, the proton conductivity of PILs was found to be dependent mostly on the temperature and, to a less extent, on the type of the cation, i.e., the increase of the conductivity from ~3 x 10-4 S/cm at 25掳C to 2 x 10-2 S/cm at 150掳C was observed The water vapor sorption capacity of PILs was evaluated as a function of relative humidity and the influence of the alkyl chain length on the phase behavior in the PIL-water system was discussed. The composite polyimide/PILs membranes were prepared by the PIL immobilization in the porous polymer (Matrimid 5218) film. The composite membranes showed a high level of proton conductivity (~10-3 S/cm) at elevated temperatures (up to 160掳C). The obtained results reveal that the elaborated composite polyimide/PIL membranes are promising candidates for the application as proton exchange membrane at middle and high temperatures In the experiment, the researchers used many compounds, for example, 1-Methyl-1H-imidazol-3-ium chloride (cas: 35487-17-3Name: 1-Methyl-1H-imidazol-3-ium chloride).
1-Methyl-1H-imidazol-3-ium chloride (cas: 35487-17-3) belongs to imidazole derivatives. The solubility of imidazoles in ethers is lower than that in alcohols and decreases with increasing chain length of the ethers . In contrast, the solubility of benzimidazoles in alcohols (C3鈥揅6) is higher than in water and generally decreases with a Imidazole derivatives have antibacterial, antifungal and anticancer functionality. It interacts with DNA and also binds to protein and stops cell division.Name: 1-Methyl-1H-imidazol-3-ium chloride
Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem