Mechanical and Antibacterial Properties of Injection Molded olypropylene/TiO2 Nano-Composites: Effects of Surface Modification

Abstract

Abstract:

Polypropylene (PP)/titanium dioxide (TiO₂) nano-composites were prepared by melt compounding with a twin screw extruder. Nanoparticles were modified prior to melt mixing with maleic anhydride grafted styreneethylene-butylene-styrene (SEBS-g-MA) and silane. The composites were injection molded and mechanical tests were applied to obtain tensile strength, elastic modulus and impact strength. Antibacterial efficiency test was applied on the injection molded composite plaques by viable cell counting technique. The results showed that the composites including SEBS-g-MA and silane coated TiO₂gave better mechanical properties than the composites without SEBS-g-MA. Antibacterial efficiency of the composites varied according to the dispersion
and the concentration of the particles and it was observed that composites at low content of TiO₂ showed higher antibacterial property due to the better photocatalytic activity of the particles during UV exposure.

Key words: Nano-TiO₂, Polypropylene, Mechanical property, Antibacterial property, Injection molding

Mirigul Altan, Huseyin Yildirim. Mechanical and Antibacterial Properties of Injection Molded olypropylene/TiO₂ Nano-Composites: Effects of Surface Modification[J]. J Mater Sci Technol, 2012, 28(8): 686-692.

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Mechanical and Antibacterial Properties of Injection Molded olypropylene/TiO₂ Nano-Composites: Effects of Surface Modification

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