Issue 8, 2020

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

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

Supplementary files

Article information

Article type
Paper
Submitted
14 oct. 2019
Accepted
28 nov. 2019
First published
10 déc. 2019

Polym. Chem., 2020,11, 1481-1488

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, 11, 1481 DOI: 10.1039/C9PY01552C

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