Abstract
AbstractPolymeric composites based on polymethylmethacrylate (PMMA), carbon nanofiber (CNF) and polyaniline (PANI) were prepared and the effect of various dopants on the morphology and antibacterial property was evaluated. CNF was given a coating of PANI through in situ polymerization method by adding five different acid dopants (hydrochloric acid (HCl), sulphuric acid (H2SO4), phosphoric acid (H3PO4), toluene sulphonic acid (TSA) and camphor sulphonic acid (CSA)) and was used to prepare the composite by solution casting method. The composites were characterized by X‐ray diffraction, FTIR spectroscopy, BET surface area analysis, DLS measurements, SEM and TEM microscopic techniques. Scanning electron micrographs and surface area analysis showed that phosphoric acid doped composite had the smallest average size and highest surface area among other four composites. The activity of the composites against Escherichia coli, Klebsiella pneumoniae and Bacillus subtilis bacteria was evaluated by agar well diffusion method. The antibacterial activity was assessed by measuring the inhibition zone diameter and minimum inhibitory concentration. The composites showed variable toxicity indicating a dependence on the type of doping agent used. A zeta potential value of +39.60 mV was obtained for phosphoric acid doped PANI/CNF composites, indicating its antibacterial property. The results showed that the antibacterial activity of this composites is tunable.
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