| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1429231 | Materials Science and Engineering: C | 2014 | 6 Pages |
•A new type of antibacterial agent (PSA/Ag-NPs nanocomposites) was synthesized.•The antibacterial activity against S. aureus and E. coli was studied.•Inhibition zone, MIC, MBC, and bactericidal kinetics were evaluated.•PSA/Ag-NPs nanocomposites showed excellent antibacterial activity.
A simple method for preparing a new type of stable antibacterial agent was presented. Monodisperse poly(styrene-co-acrylic acid) (PSA) nanospheres, serving as matrices, were synthesized via soap-free emulsion polymerization. Field-emission scanning electron microscopy micrographs indicated that PSA nanospheres have interesting surface microstructures and well-controlled particle size distributions. Silver-loaded poly(styrene-co-acrylic acid) (PSA/Ag-NPs) nanocomposites were prepared in situ through interfacial reduction of silver nitrate with sodium borohydride, and further characterized by transmission electron microscopy and X-ray diffraction. Their effects on antibacterial activity including inhibition zone, minimum inhibitory concentration (MIC), minimum bactericidal concentration (MBC), and bactericidal kinetics were evaluated. In the tests, PSA/Ag-NPs nanocomposites showed excellent antibacterial activity against both gram-positive Staphylococcus aureus and gram-negative Escherichia coli. These nanocomposites are considered to have potential application in antibacterial coatings on biomedical devices to reduce nosocomial infection rates.
