Abstract
Polypropylene/Polyamide 6 (PP/PA6) blends-TiO2 nanocomposites have been prepared via melt blending PP/PA6 with TiO2 nanoparticles, which were pretreated with toluene-2,4-di-isocyanate. The functionalized-TiO2 can react with the terminal amino and carboxyl groups at PA6, interfacial interaction and compatibility between TiO2 and matrix have been greatly improved resulted in higher tensile and impact strength than that of those filled with pristine TiO2 or pure PP/PA6 blends, and they have strong antimicrobial abilities against Bacillus subtilis, Staphylococcus aureus and Escherichia coli. The average efficiency of antibacterial is over 90% within 2.0 h. Mechanical and antibacterial properties can achieve their maximum with 3.0 wt%TiO2.
Notes
a, b and c refer to the antibacterial rate (%) against Bacillus subtilis, Staphylococcus aureus and Colon bacillus, respectively; PP/PA6/3p-T and PP/PA6/1T refer to the PP/PA6 blends incorporated 3.0 wt% pristine and 1.0 wt% TDI-functionalized TiO2 nanoparticles, respectively.