摘要
While Sulfonated polymers are commonly used In membranes for fuel cells and water filtration applications, challenges of controlling ionic aggregation and understanding morphology effects on conductivity and transport still remain:In this work, we investigate the aggregation of copolymer-grafted nanoparticles that are designed to form conductive structure With low sulfonation amounts Of chains. We, demonstrate that long grafts of polystyrene chains with sulfonated end groups form side-by-side aggregated strings and retain their structures in ionic liquid, 1-hexyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide, [HMIM] [TFSI]. Transmission electron tomography results revealed that these aggregates, are monolayers of particles at low sulfonations and planar-like networks at 3 mol % sulfonation in the ionic liquid. Organization of magnetic nanoparticles with the polymer grafting approach is shown, for the first time, to enhance conductivity upon incorporation of an ionic liquid.
- 出版日期2015-7-28