During chemical polymerization of pyrrole, electroneutrality
of the polymer matrix is maintained by incorporation of
anions of oxidant from the reaction solution. Ferric chloride
has been found to be the chemical oxidant and water has been
reported the best solvent for chemical polymerization of pyrrole.
For preparation of PPy/RHA nanocomposite, 5 g FeCl3
was added to 100 mL of water and then a uniform solution
was resulted by using magnetic mixer. Then, 1 g of rice husk
ash was added to the solution and 1 mL fresh distilled pyrrole
monomer was added to stirred solution. The reaction was carried
out for 4 h at room temperature. Consequently, the product
was filtered to separate the impurities; product was
washed several times with deionized water and dried at temperature
about 60 C in oven for 24 h.