Preparation and Characterization of Tetra-Imidazolium Hydroxide Polyphenylene Membranes via Nickel Catalyzed C–C Coupling Polymerization

Hohyoun Jang, Soonho Lee, Jaeseong Ha, Kunyoung Choi, Taewook Ryu, Kyunghwan Kim, Heung-Seok Jeon and Whangi Kim
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Hohyoun Jang: Department of Applied Chemistry, Konkuk University, Chungju 380-701, Korea
Soonho Lee: Department of Applied Chemistry, Konkuk University, Chungju 380-701, Korea
Jaeseong Ha: Department of Applied Chemistry, Konkuk University, Chungju 380-701, Korea
Kunyoung Choi: Department of Applied Chemistry, Konkuk University, Chungju 380-701, Korea
Taewook Ryu: Department of Applied Chemistry, Konkuk University, Chungju 380-701, Korea
Kyunghwan Kim: Department of Applied Chemistry, Konkuk University, Chungju 380-701, Korea
Heung-Seok Jeon: Department of Computer Engineering, Konkuk University, Chungju 380-701, Korea
Whangi Kim: Department of Applied Chemistry, Konkuk University, Chungju 380-701, Korea

Energies, 2016, vol. 9, issue 4, 1-10

Abstract: Imidazolium hydroxide anion exchange membranes functionalized with conjugated tetraphenylethylene moieties were synthesized via Ni(0) catalyzed polymerization by sequential chloromethylation, substitution with imidazoliums and ion exchange. Moreover, with their pendant benzoyl groups the copolymers showed high molecular weight, durability, thermo-oxidative stability, high solubility in polar aprotic solvents and strong chemical and thermal stability in comparison to alkyl quaternary ammonium-functionalized polymers. The proposed polymer membranes, without ether linkages, demonstrated improved performance in ion exchange capacity, water uptake, ion conductivity, and thermal stability. The polymer membranes were studied by 1 H-NMR (Nuclear Magnetic Resonance) spectroscopy, thermogravimetric analysis, water uptake, ion exchange capacity and ion conductivity. Surface morphologies were assessed by atomic force microscope (AFM). The synthesized polymers may have applications as fuel cell membranes because of their excellent ion conductivity.

Keywords: imidazolium; nickel catalyst; polyphenylene; anion exchange membrane; alkaline fuel cell (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2016
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