Jheng, Li-Cheng; Cheng, Cheng-Wei; Ho, Ko-Shan; Hsu, Steve Lien-Chung; Hsu, Chung-Yen; Lin, Bi-Yun; Ho, Tsung-Han published their research in Polymers (Basel, Switzerland) in 2021. The article was titled 《Dimethylimidazolium-Functionalized Polybenzimidazole and Its Organic-Inorganic Hybrid Membranes for Anion Exchange Membrane Fuel Cells》.Computed Properties of C6H12Br2 The article contains the following contents:
A quaternized polybenzimidazole (PBI) membrane was synthesized by grafting a dimethylimidazolium end-capped side chain onto PBI. The organic-inorganic hybrid membrane of the quaternized PBI was prepared via a silane-induced crosslinking process with triethoxysilylpropyl dimethylimidazolium chloride. The chem. structure and membrane morphol. were characterized using NMR, FTIR, TGA, SEM, EDX, AFM, SAXS, and XPS techniques. Compared with the pristine membrane of dimethylimidazolium-functionalized PBI, its hybrid membrane exhibited a lower swelling ratio, higher mech. strength, and better oxidative stability. However, the morphol. of hydrophilic/hydrophobic phase separation, which facilitates the ion transport along hydrophilic channels, only successfully developed in the pristine membrane. As a result, the hydroxide conductivity of the pristine membrane (5.02 x 10-2 S cm-1 at 80°C) was measured higher than that of the hybrid membrane (2.22 x 10-2 S cm-1 at 80°C). The hydroxide conductivity and tensile results suggested that both membranes had good alk. stability in 2M KOH solution at 80°C. Furthermore, the maximum power densities of the pristine and hybrid membranes of dimethylimidazolium-functionalized PBI reached 241 mW cm-2 and 152 mW cm-2 at 60°C, resp. The fuel cell performance result demonstrates that these two membranes are promising as AEMs for fuel cell applications. In the experimental materials used by the author, we found 1,6-Dibromohexane(cas: 629-03-8Computed Properties of C6H12Br2)
1,6-Dibromohexane(cas: 629-03-8) is generally used to introduce C6 spacer in the molecular architecture. Some of the examples are: synthesis of pyrrolo-tetrathiafulvalene molecular bridge (6PTTF6) to study redox switching behavior of single molecules; synthesis of water-soluble thermoresponsive polylactides.Computed Properties of C6H12Br2
Referemce:
Bromide – Wikipedia,
bromide – Wiktionary