Polymerization of ionic liquid-based microemulsions: a versatile method for the preparation of polymer electrolytes

摘要

A series of polymer electrolytes with high ionic conductivity have been prepared by polymerization of ionic liquid-in-oil microemulsions composed of a room temperature ionic liquid (l-butyl-3-methylimidazolium tetrafluoroborate ([Bmim][BF4])), a polymerizable oil and a polymerizable surfactant, 1-(2-methyl acryloyloxyundecyl)-3-methyl imidazolium bromide (MAUM-Br). Polymerization of ionic liquid-based microemulsions yielded free-standing, flexible and transparent polymer electrolytes even though the resulting vinyl polymers are incompatible with ionic liquid cores. The conductivity of polymer electrolytes increased with an increase in IL concentration and as well with increasing temperature.