Development and characterization of multilayer films of polyaniline, titanium dioxide and CTAB for potential antimicrobial applications

• Published in: Materials Science & Engineering C 2014-02, Vol.35, p.449-454
• Main Authors: Farias, Emanuel Airton O., Dionisio, Natália A., Quelemes, Patrick V., Leal, Sergio Henrique, Matos, José Milton E., Filho, Edson C. Silva, Bechtold, Ivan H., Leite, José Roberto S.A., Eiras, Carla
• Format: Article
• Language: English
• Subjects: Aniline Compounds - chemistry; Aniline Compounds - pharmacology; Anti-Bacterial Agents - chemical synthesis; Anti-Bacterial Agents - pharmacology; Antiinfectives and antibacterials; Antimicrobial activity; Atomic force microscopy; Cell Survival - drug effects; Ceramics; Cetrimonium Compounds - chemistry; Cetrimonium Compounds - pharmacology; Cetyl trimethylammonium bromide; Coated Materials, Biocompatible - chemical synthesis; Coated Materials, Biocompatible - pharmacology; Coatings; Composite films; Layer-by-layer; Materials science; Materials Testing; Membranes, Artificial; Polyaniline; Polyanilines; Self assembly; Staphylococcus aureus - drug effects; Staphylococcus aureus - physiology; Titanium - chemistry; Titanium - pharmacology; Titanium dioxide
• ISSN: 0928-4931; 1873-0191
• DOI: 10.1016/j.msec.2013.11.002

Composites prepared from polyaniline (PANI) and the ceramic technology of titanium dioxide (TiO2) have been proposed, however, the interaction of these materials with greater control of molecular arrangement becomes attractive in order to achieve properties not previously described or yet the optimization of those already reported. Therefore, in this study, thin hybrid films made of polyaniline (PANI), a conductive polymer, and the technological ceramic, titanium dioxide (TiO2), were prepared by the layer-by-layer (LbL) self-assembly technique. The films were characterized by cyclic voltammetry (CV), UV–VIS spectroscopy and atomic force microscopy (AFM). Aiming to improve the dispersion of the ceramic in the polymer matrix, the commercial surfactant, cetyl trimethylammonium bromide (CTAB), was used in the formation of the films. The best condition of deposition was found showing synergic interactions between the conjugated materials. The antibacterial activity of the PANI(TiO2)/CTAB films was studied and the obtained results suggest their use as antimicrobial coatings. •Nanocomposite films of PANI and TiO2 prepared by the LbL technique•Ceramic dispersion in PANI improved with CTAB for antimicrobial applications.•Optimized film deposition for synergic interactions of the conjugated materials•Antibacterial activity of the films suggests their use as antimicrobial coatings.