| Antibacterial properties of silver nanoparticle-decorated porous polyurethane surface for water purification |
| Paper ID : 1303-UFGNSM-FULL |
| Authors: |
|
Ali Izadi-Darbandi *1, Marzieh Nadafan2 1Department of Agronomy and Plant Breeding Sciences,
University of Tehran, College of Aburaihan
Postal code:3391653755 Tehran-pakdasht , IRAN. 2Department of Physics, Shahid Rajaee Teacher Training University, Tehran, Lavizan, P. O. Box 16788-15811, I.R. Iran |
| Abstract: |
| Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy, and optical micrograph studies on silver nanoparticle-decorated polyurethane confirmed that Morphology of the foam did not change after coating with silver colloidal solution. and silver nanoparticles were not washed away by repeated washing or immersion in an ultrasonic bath and keeping the treated foams for several weeks at the room temperature. According to the FTIR spectra, the nanoparticle binding is due to the interaction of silver atoms on the surface of the nanoparticles with the nitrogen atom at polyurethane foam. Highly antibacterial effects of polyurethane foams coated with silver nanoparticles were characterized through growth curve studies and colony counting of Escherichia coli on the LB broth and LB-Agar media, consequently. the growth curve of E. coli in the control LB Broth medium had a hyperbolic trend and the ODs (optical density) of the bacterium increased exponentially from zero to 2.2. However, in the media containing polyurethane foams included silver nanoparticle, the bacterial growth curve was highly suppressed and the ultimate OD reached 0.23. Considering the low cost and effectiveness in prohibiting the growth of E. coli, this technology may have large implications for decontamination of liquid or solid environments. The experiments prove the potential of these materials in water treatment applications. |
| Keywords: |
| Antibacterial; Silver nanoparticle; Polyurethane; E. coli |
| Status : Paper Accepted (Poster Presentation) |
