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Energies 2016, 9(4), 271; doi:10.3390/en9040271

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

1
Department of Applied Chemistry, Konkuk University, Chungju 380-701, Korea
2
Department of Computer Engineering, Konkuk University, Chungju 380-701, Korea
*
Author to whom correspondence should be addressed.
Academic Editor: Vladimir Gurau
Received: 16 December 2015 / Revised: 16 March 2016 / Accepted: 28 March 2016 / Published: 6 April 2016
(This article belongs to the Special Issue Polymer Electrolyte Membrane Fuel Cells 2016)
View Full-Text   |   Download PDF [2791 KB, uploaded 6 April 2016]   |  

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 1H-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. View Full-Text
Keywords: imidazolium; nickel catalyst; polyphenylene; anion exchange membrane; alkaline fuel cell imidazolium; nickel catalyst; polyphenylene; anion exchange membrane; alkaline fuel cell
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Jang, H.; Lee, S.; Ha, J.; Choi, K.; Ryu, T.; Kim, K.; Jeon, H.-S.; Kim, W. Preparation and Characterization of Tetra-Imidazolium Hydroxide Polyphenylene Membranes via Nickel Catalyzed C–C Coupling Polymerization. Energies 2016, 9, 271.

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