Investigation of the effect of acid dopant on the physical properties of polyaniline prepared using microwave irradiation |
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| Institution: | 1. Public Company Nuclear Facilities of Serbia, 12-14 Mike Petrovica Alasa, Vinca 11351, Belgrade, Serbia;2. School of Chemical Sciences, The University of Auckland, Private Bag 92019, Auckland Mail Centre, Auckland 1142, New Zealand;3. MacDiarmid Institute for Advanced Materials and Nanotechnology, Victoria University of Wellington, PO Box 600, Wellington 6140, New Zealand;4. Institute of General and Physical Chemistry, Studentski Trg 12-16, 11001 Belgrade, Serbia;5. Faculty of Physical Chemistry, Studentski Trg 12-16, P.O. Box 137, 11001 Belgrade, Serbia |
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| Abstract: | 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 cm?1 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. |
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| Keywords: | Polyaniline Microwave irradiation HCl dopant SEM and EPR |
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