Abstract
This work describes the synthesis of polyaniline/silica-coated magnetite composites (PANI-SMc) for antibacterial and anticandidal applications. PANI-SMc exhibits antimicrobial activity against Escherichia coli, Staphylococcus aureus, and Candida albicans. PANI has a characteristic band at 1,570 cm−1, corresponds to the –C=C– stretching vibrations of quinoid (N=Q=N), and shifted to ∼1,570–1,620 cm−1 in PANI-SMc, indicating imine nitrogen is more involved in the interaction. PANI-SMc shows an amorphous phase, and SMc improves the thermal stability of PANI-SMc. The magnetization of PANI-SMc is lower than SMc; however, it is still firm to be magnetically separated by external magnetic fields. SEM images reveal polyaniline successfully distributed.
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