Siloxane-Based Main-Chain Poly(ionic liquid)s via a Debus-Radziszewski Reaction

Manuel Reiter; Atefeh Khorsand Kheirabad; Miriam M Unterlass; Jiayin Yuan

doi:10.1021/acspolymersau.1c00029

Siloxane-Based Main-Chain Poly(ionic liquid)s via a Debus-Radziszewski Reaction

ACS Polym Au. 2022 Apr 13;2(2):80-87. doi: 10.1021/acspolymersau.1c00029. Epub 2021 Nov 17.

Authors

Manuel Reiter^{1

2

3}, Atefeh Khorsand Kheirabad¹, Miriam M Unterlass^{2

3}, Jiayin Yuan¹

Affiliations

¹ Department of Materials and Environmental Chemistry (MMK), Stockholm University, 10691 Stockholm, Sweden.
² Institute of Applied Synthetic Chemistry, TU Wien, 1060 Vienna, Austria.
³ Institute of Materials Chemistry, TU Wien, 1060 Vienna, Austria.

Abstract

Herein, we synthesized a series of siloxane-based poly(ionic liquid)s (PILs) with imidazolium-type species in the main chain via the multicomponent Debus-Radziszewski reaction. We employed oligodimethylsiloxane diamine precursors to integrate flexible spacers in the polymer backbone and ultimately succeeded in obtaining main-chain PILs with low glass transition temperatures (T _g s) in the range of -40 to -18 °C. Such PILs were combined with conventional hydrophobic vinylimidazolium-based PILs for the fabrication of porous membranes via interpolyelectrolyte complexation with poly(acrylic acid), which leads to enhanced mechanical performance in the tensile testing measurements. This study will enrich the structure library of main-chain PILs and open up more opportunities for potential industrial applications of porous imidazolium-based membranes.