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Poly(diallyldimethylammonium) based poly(ionic liquid) di- and triblock copolymers by PISA as matrices for ionogel membranes

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Abstract

The synthesis of poly(diallyldimethylammonium)-b-polystyrene di- and triblock ABA copolymers was investigated by Macromolecular Design by Interchange of Xanthate/Reversible-Addition Fragmentation Transfer (MADIX/RAFT) using Polymerization-Induced Self-Assembly (PISA) conditions. A diallyldimethylammonium chloride (DADMAC) monomer was firstly polymerized in water using a mono- or difunctional MADIX agent at 60 °C with a water-soluble azo initiator. Then, PISA was implemented using poly(diallyldimethylammonium chloride) as a cationic macromolecular chain transfer agent and styrene for the emulsion phase, leading to latexes made of di- or triblock copolymers. After anion exchange between the chloride and bis(trifluoromethanesulfonyl)imide, the corresponding poly(ionic liquid)-b-polystyrene copolymers were obtained. The block copolymers were mixed with an ionic liquid electrolyte commonly used in sodium batteries composed of a mixture of a propyl-N-methylpyrrolidinium bis(fluorosulfonyl)imide ionic liquid and a sodium bis(fluorosulfonyl)imide salt. After casting, self-standing ionogel membranes were obtained. Compared to diblock copolymers, triblock copolymers showed the best self-standing properties, which may be related to the physical cross-linking of the two external polystyrene blocks. Interestingly, the ionogels based on triblock copolymers showed superior ionic conductivity values to previous electrolytes using homopoly(ionic liquid) matrices.

Graphical abstract: Poly(diallyldimethylammonium) based poly(ionic liquid) di- and triblock copolymers by PISA as matrices for ionogel membranes

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Supplementary files

Article information


Submitted
14 Oct 2019
Accepted
28 Nov 2019
First published
10 Dec 2019

Polym. Chem., 2020, Advance Article
Article type
Paper

Poly(diallyldimethylammonium) based poly(ionic liquid) di- and triblock copolymers by PISA as matrices for ionogel membranes

J. Demarteau, A. Fernandez de Añastro, A. S. Shaplov and D. Mecerreyes, Polym. Chem., 2020, Advance Article , DOI: 10.1039/C9PY01552C

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