Polymerized Paired Ions as Polymeric Ionic Liquid–Proton Conductivity. Issue 14 (21st June 2016) - Gu, Hong
Abstract : A new polymerized ionic liquid has been derived by photopolymerization of a stimuli‐responsive ionic liquid surfactant, ILAMPS, which is composed of polymerizable, paired ions. The cation is 1‐methyl‐3‐[11‐(acryloyloxy)undecyl] imidazolium (IL), and the anion is 2‐acrylamido‐2‐methyl‐1‐propanesulfonate (AMPS). This ion combination is a new ionic liquid. The resulting hygroscopic resins are highly polarizable, suitable for sensor design and for ultracapacitor fabrication and proton conducting. Interactions of imidazolium with anions provide basis for stimuli‐responsiveness, and are used to promote proton transport. Doping with one equivalent of HPF6 at 0% relative humidity produces a 100‐fold increase in proton conductivity at 100–125 °C and activation energies for proton transport lower than those of Nafion at water loadings less than 5 per sulfonate. Abstract : A proton conducting polymerized ionic liquid resin is derived by photo‐polymerization of a stimuli‐responsive ionic liquid composed of polymerizable, paired ions: 1‐methyl‐3‐[11‐[acryloyloxy)undecyl]imidazolium; 2‐acrylamido‐2‐methyl‐1‐propanesulfonate. Doping with one equivalent of HPF6 at 0% relative humidity produces a 100‐fold increase in proton conductivity at 100–125 °C and lower conduction activation energies than those of Nafion at less than 5 water molecules per sulfonate.