Fabrication of soft-etched nanoporous polyimide membranes for ionic conduction and discrimination was written by Froehlich, Kristina;Nasir, Saima;Ali, Mubarak;Ramirez, Patricio;Cervera, Javier;Mafe, Salvador;Ensinger, Wolfgang. And the article was included in Journal of Membrane Science in 2021.Computed Properties of C4H12ClN The following contents are mentioned in the article:
Ionic selectivity in nanopores is usually based either on steric or charge exclusion mechanisms. By simultaneously incorporating both mechanisms into a functionalized membrane, an improved control over selectivity can be achieved. We describe the fabrication and exptl. characterization of alkali metal cation-selective nanopores in heavy ion-tracked polyimide (PI) membranes using the soft-etching (SE) technique. The latent ion tracks in the PI membrane are selectively dissolved by an organic solvent to form tiny pores without affecting the bulk material. The ionic transport properties of SE-PI membranes are characterized using different electrolyte solutions containing alkali metals, divalent metals, and organic cations under sym. and asym. electrolyte conditions. Under sym. conditions, the pores exhibit ohmic behavior when exposed to alkali metal chlorides and ammonium chloride solutions while divalent cations cannot pass through the pores as evidenced from the current-voltage curves. For the case of asym. electrolyte conditions, current rectification suggests pore blockage from the side of membrane exposed to divalent cations and tetraalkylammonium (TAA) cations. The exptl. data show that the SE-PI membranes efficiently discriminate alkali cations from divalent metal cations and ammonium cation from TAA cations. The ionic conduction of the membranes is also sensitive to the mole fraction of Ca2+ in multi-ionic solutions The ionic transport experiments further confirm that the nanopores allow significant alkali cation fluxes while rejecting divalent cations. Based on the good stability and high selectivity, the solvent treated PI membranes constitute remarkable candidates to be employed in applications concerning a wide range of electrolyte solutions This study involved multiple reactions and reactants, such as Tetramethylammonium chloride (cas: 75-57-0Computed Properties of C4H12ClN).
Tetramethylammonium chloride (cas: 75-57-0) belongs to organic chlorides. An organic chloride is an organic compound containing at least one covalently bonded atom of chlorine. Their wide structural variety and divergent chemical properties lead to a broad range of names and applications. Alkyl chlorides readily react with amines to give substituted amines. Alkyl chlorides are substituted by softer halides such as the iodide in the Finkelstein reaction.Computed Properties of C4H12ClN
Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics