Influence of Anion Exchange in Self-Assembling of Polymeric Ionic Liquid Block Copolymers

Abstract

A new technique for the modification of lamellar domain sizes in polymeric ionic liquid block copolymers has been proposed. Anion exchange in polymeric ionic liquids opens new ways to modify the sizes of lamella domains without modifying the ratio between the two different blocks of the neat copolymer. This study focuses on the influence of quaternization of poly(2-vinylpyridine) in poly(styrene-b-2-vinylpyridine) (PS-b-P2VP) and the effect of anion exchange in the nanostructured phases for thin films. The resulting materials obtained from the quaternization modification technique of the block copolymers and the anion exchange of the polymeric ionic liquid were characterized with Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), and nuclear magnetic resonance (NMR). Furthermore, morphological characterization of the initial block polymer and several polymeric ionic liquid block copolymers has been carried out by atomic force microscopy (AFM) in order to analyze the influence of the anion in the nanostructures of these block copolymers.

Precision Synthesis of Poly(Ionic Liquid)‐Based Block Copolymers by Cobalt‐Mediated Radical Polymerization and Preliminary Study of Their Self‐Assembling Properties

“…In this regard, PILs behave as single‐ion conductors, with IL moieties as pendant groups and mobile counterions. Interestingly, confinement of blocks within lamellar nanodomains allows increasing the ionic conductivity by 1–2 orders of magnitude, relatively to statistical copolymer homologues or homopolymers …”

Polymerized ionic liquid block copolymers for electrochemical energy

“…In this paper, we will highlight the recent work on PIL block copolymers, specically, their synthesis and unique solid-state properties, as it applies to electrochemical energy. Within these techniques, generally two overarching strategies have been used to produce PIL block copolymers: the sequential polymerization of multiple non-ionic monomers followed by subsequent functionalization or quaternization of one of the monomers 11,12,14,27,[30][31][32][33][34]42,43 and the direct sequential polymerization of a non-ionic monomer and an IL monomer. Within these techniques, generally two overarching strategies have been used to produce PIL block copolymers: the sequential polymerization of multiple non-ionic monomers followed by subsequent functionalization or quaternization of one of the monomers 11,12,14,27,[30][31][32][33][34]42,43 and the direct sequential polymerization of a non-ionic monomer and an IL monomer.…”

Ionic Liquids and Polymeric Ionic Liquids as Stimuli-Responsive Functional Materials

“…Carrasco and co-workers [58] demonstrated an interesting effect of anion exchange on the lamellar packing of PS-b-P2VP diblocks. These diblocks were first made by anionic polymerization.…”