Carbon nano-onion-filled polyacrylonitrile/polyethylenimine foams: structure, characteristics, and ion detoxification studies

This study reports on novel polyacrylonitrile/polyethylenimine (PAN/PEI) blend, polyacrylonitrile/polyethylenimine/carbon nano-onion (PAN/PEI/CNO) nanocomposite and related PAN/PEI/CNO foam materials with 0.5–5 wt.% nanofiller loading. Acid functional carbon nano-onion was used as reinforcement. Foams were produced using reflux method and 2′-azobisisobutyronitrile foaming agent. Field emission scanning electron microscopy and transmission...