Highly Flexible Temperature Tolerant Anhydrous Nafion-1,2,3-Triazole Blend Membranes Synthesized by Autoclave Solution Processing

Abstract

This paper was investigated for the properties of Nafion-1,2,3-triazole blend membranes by room temperature (RT) and autoclave (AC) solution processing with different weight percent. Both blend membranes were very flexible, transparent, and homogeneous. To get the high proton conductivity, it was required an AC solution processing at the temperature of 200oC. The conductivity of the blend membranes using AC was one order higher than that of RT solution processing. The elementary analysis of the blend membrane using AC solution processing showed higher hydrogen concentration than that of RT solution processing. 1H NMR of the blend solution using AC solution processing showed the chemical shifts of not only Nafion solution and 1,2,3-triazole but also new products. The Nafion-1,2,3-triazole blend membranes showed a thermal stability up to 200oC from cycle properties by differential scanning calorimetry (DSC).

Annealing Effect of Nafion-Propyl-1,2,3-Triazole Membrane by Autoclave Solution Processing

“…We have investigated various acid-base composite membranes [7][8][22][23][24][25], and base chemicals were found to be well incorporated into the nanostructure of sulfonic acid phase in ECS Transactions, 85 (13) 943-959 (2018) Nafion polymers. 1,2,3-triazole is a heterocyclic chemical with three nitrogen atoms that reacts with propanol in the presence of a concentrated sulphuric acid catalyst [26].…”

Nafion-Azole-H3PO4 Composite Membranes Using Solution Processing for High Temperature PEMFCs

“…Electrolyte membranes with alternative chemistries that are tolerant to high temperatures (100 -200 o C) have been investigated, such as perfluorinated ionomers and their composites (H 3 PO 4 , heteropolyacid, silica, zirconium phosphate, TiO 2 , imidazole/H 3 PO 4 , benzimidazole, 1,2,4-triazole and 1,2,3-triazole) (2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12), hydrocarbon polymer membranes such as sulfonated poly(ether ether ketone) (SPEEK) (13)(14)(15)(16), polybenzimidazole (PBI) (1,(17)(18)(19)(20)(21)(22)(23), poly(2,5-benzimidazole) (ABPBI) (23,24), organicinorganic blend membranes (25)(26)(27)(28)(29), and 1,2,3-triazole derivatives (30)(31)(32)(33). Among them, Nafion 117 (115) / H 3 PO 4 (2,3,6) and PBI (AB-PBI) / H 3 PO 4 membranes were studied as anhydrous electrolytes for the application of high temperature PEMFCs.…”

“…We have studied the acid-base composite membranes using Nafion solution and azole group of imidazole, pyrazole, 1,2,4-triazole, benzimidazole, 1,2,3-triazole as anhydrous electrolytes (7)(8)(9)(10)(11)(12). Although it needs still higher proton conductivity for the application of high temperature PEMFC, azole can be increased the amount of phosphoric acid in Nafion.…”

Nafion-1,2,3-Triazole Composite Membrane for Fuel Cell

“…Among them, we reported various acid-base composite membranes, which base monomers using azole groups are incorporated into the nanostructure of Nafion acid (8)(9)(23)(24)(25)(26). The acid-base composite membranes could be used to replace water as the proton acceptor within the perfluorinated ionomer membrane.…”