Synthesis, Characterization, and Application of Cross-Linked Poly(ethylene glycol) Networks Used for the Gelation of Ionic Liquids

摘要

Cross-linking polymerization of functionalized poly(ethylene glycol) (PEG) monomers has been found to effectively gel hydrophobic ionic liquids (ILs). By coupling a tetra-arm PEG amine with a bifunctional succinimidyl PEG monomer, stable, free-standing gels can be formed. Gelation showed a strong IL anion dependence, whereas changing the IL cations gave little change. The gels showed a shrink-swell response to their solvent environment, while the IL entrained within the gels retains bulk properties of the neat IL. Applications include potential separations media and as IL-polymer electrolytes.