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Milutin Jevremovic,Zoran Zujovic,Dragomir Stanisavljev,Graham Bowmaker,Marija Gizdavic-Nikolaidis 한국물리학회 2014 Current Applied Physics Vol.14 No.9
The microwave (MW) synthesis of polyaniline (PANI) is performed using potassium iodate (KIO3) as oxidizing agent in different concentrations of aqueous hydrochloric acid (HCl) at 8 and 93 W applied microwave power for duration of 10 min. The morphological and structural changes in synthesized MW PANI samples are investigated using Scanning Electron Microscopy (SEM) and Fourier transform Infrared Spectroscopy (FTIR). With decreasing pH of the reaction medium the morphology of MW PANI samples changed from slab-like with a small amount of fibrils to porous products which consist of short, rod-like structures. The FTIR spectra confirm that the microwave generated materials structurally consist of PANI, but aniline oligomer peaks are observed in the FTIR at 725 and 686 cm1 for MW PANI synthesized using 0.5 M aqueous HCl. The influence of acid dopant on the spin concentration of MW PANI synthesized at 8 and 93 W are examined.
The antioxidant activity of conducting polymers in biomedical applications
Paul A. Kilmartin,Corrina Thompson,Jadranka Travas-Sejdic,Graham A. Bowmaker,Ralph P. Cooney,Marija Gizdavic-Nikolaidis 한국물리학회 2004 Current Applied Physics Vol.4 No.2-4
The radical scavenging ability of soluble conducting polymers has been examined using the DPPH assay in comparison withphenolic antioxidant compounds present in the diet. The reducing strength was also determined by voltammetry at a carbonelectrode both in an aqueous pH 7.0 buer, and in methanol as used for the DPPH assay. The conducting polymers were shown tobe good reducing agents and eective scavengers of free radicals, with 24 DPPH radicals being reduced for each aniline or pyrroleunit on the polymer chains. The signicance of this antioxidant capacity for the application of conducting polymers as biomaterialsis considered.