Antibacterial and antifouling activities of chitosan/TiO2/Ag NPs nanocomposite films against packaged drinking water bacterial isolates.
Saravanan NatarajanM BhuvaneshwariD Shanthana LakshmiP MrudulaN ChandrasekaranAmitava MukherjeePublished in: Environmental science and pollution research international (2016)
TiO2 and Ag NPs are widely used as antibacterial agents against many bacterial pathogens. Chitosan (polymer) itself acts as a strong antibacterial agent. Hence, chitosan/TiO2/Ag NPs incorporated nanocomposite film was prepared against packed drinking water bacterial strains. A concentration-dependent increase in the reduction of cell viability was observed in all the isolates under UV-C and dark exposure conditions. The bacteria consortium showed greater resistance against antibacterial effects of chitosan/TiO2/Ag nanocomposite as compared to single isolates. Glycocalyx test and mass assessment conclude the effective antibacterial activity by inhibiting bacterial adhesion on the film surface. The release of LDH and generation of ROS act as the predominant antibacterial mechanism induced by TiO2/Ag NPs. Surface characterization of chitosan/TiO2/Ag nanocomposite was studied by FTIR and XRD analyses and SEM analysis after interaction with the bacteria.
Keyphrases
- visible light
- drinking water
- quantum dots
- wound healing
- drug delivery
- silver nanoparticles
- health risk
- health risk assessment
- hyaluronic acid
- reduced graphene oxide
- room temperature
- anti inflammatory
- genetic diversity
- signaling pathway
- dna damage
- cell death
- oxidative stress
- gold nanoparticles
- highly efficient
- pseudomonas aeruginosa
- multidrug resistant
- carbon nanotubes