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Cross-Linked Alkaline Anion Exchange Membrane from N-Spirocyclic Quaternary Ammonium and Polybenzimidazole by Anupam Das; Balakondareddy Sana; Rama Bhattacharyya; Prakash Chandra Ghosh; Tushar Jana is a Materials Science article available to read on EtoBox.
What is Cross-Linked Alkaline Anion Exchange Membrane from N-Spirocyclic Quaternary Ammonium and Polybenzimidazole about?
Two major challenges, namely, hydroxide conductivity and alkaline stability of the polymer membrane, are yet to be resolved adequately in spite of significant research outcomes on alkaline anion exchange membrane (AAEM) in the recent past. To address these challenges, in this work, the development of ionically cross-linked AAEMs has been achieved by blending pyridine-bridged polybenzimidazole (PyPBI) and Nspirocyclic quaternary ammonium spiro ionene polymer (SP). Further, membranes were converted to porous membranes by adding different weight percentages of porogen in the membrane matrix. Membranes were converted to hydroxide-conducting AAEMs by dipping into 1 M KOH solution, and under this condition, a part of the -NHgroups of PyPBI was deprotonated to form ammonium-imidazolate complexes with SP, which resulted in ionic cross-linking in the AAEM. Hydroxide ion conductivity of 129 mS/cm at 90 °C was obtained in the case of the S70P30-OH membrane, which was a hydroxideform membrane obtained from the blend of 70 wt % SP and 30 wt % PyPBI, and this membrane showed the highest KOH uptake among all other AAEMs prepared in this study. On the other hand, among the porous ionically cross-l
Who reads Cross-Linked Alkaline Anion Exchange Membrane from N-Spirocyclic Quaternary Ammonium and Polybenzimidazole?
It is typically read by researchers, students, and practitioners in Materials Science.
- Author
- Anupam Das; Balakondareddy Sana; Rama Bhattacharyya; Prakash Chandra Ghosh; Tushar Jana
- Publisher
- American Chemical Society (ACS)
- Published
- 2022
- Language
- EN
- Field
- Materials Science (Physical Sciences)