Cytoxicity of TiO2 nanoparticles and effect of incorporation of nanoTiO2-PEDOT:PSS composite in PVAc coating on anticorrosive performance
2017
Nurul Azimah Mahamad Aziz | Mohd Sabri Mohd Ghazali | Wan Rafizah Wan Abdullah | Wan Mohd Norsani Wan Nik | Nurul Huda Abd Kadir | Nurul Ain Abdul Rahim | Nur Afikah Othman
Titanium dioxide, TiO2 has commonly been used as additives in anticorrosion coating. However, coating production involving nano-sized metal oxide has been a concern since it can potentially be transmitted into the human body through inhalation or contactwith skin. Therefore, the cytotoxicity of the TiO2 nanoparticles was studied via assay of fibroblast cells viability. The anticorrosive performance of nanotitanium dioxide-poly (3, 4-ethylenedioxythiophene) polystyrene sulfonate (nanoTiO2-PEDOT:PSS) composite as additives in PVAc matrix was also studied via potentiodynamic polarization (PP) by varying the weight percentage (wt.%) of additives from 1-5 wt.%. From this work, after 24 and 48 hours of exposure, TiO2 induced only 40% cell death (40% inhibition), indicating low cytotoxicity. For anticorrosive performance, 2 wt.% of nanoTiO2-PEDOT:PSS composite content displayed the best corrosion protection as Icorr , Ecorr and corrosion rate is the lowest with 0.067 μA/cm2;0.0751 V; and 0.0008 mm/yr; respectively. Thus, TiO2 is safe to human cell and its incorporation with PEDOT:PSS is able to protect metals from corrosion.
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