Anion conductive polymers: new development for energy devices

点击翻译按钮获取中文摘要

In the first year, terpolymer-based anion exchange polymers were designed synthesized. Hexafluoroisopropylidene biphenylene and pendent perfluoro-containing phenylene groups were chosen as the hydrophobic components, and quaternized piperidinium containing C2 fluorenyl groups were chosen as the hydrophobic components. The polymerzation reaction and the following quaternization reaction both proceeded well to obtain high-molecular-weight terpolymers of targeted structure, which was characterized by NMR spectra. Flexible thin membranes were obtained by solution casting method. The ion exchange capacity of the membranes was controllable by simply changing the terpolymer composition. Currently, membrane properties are under investigation. The measurements include hydroxide ion conductivity and its temperature dependence, mechanical strength (stress versus strain, dynamic mechanical properties and their temperature/humidity dependence), and alkaline stability (in concentrated KOH solution at high temperature where the hydroxide ion conductivity is monitored as a measure of the decomposition of the ammonium groups.