Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 3, Issue 11, Pages 4228-4235Publisher
AMER CHEMICAL SOC
DOI: 10.1021/am200864p
Keywords
N-halamine; SiO2; Fe3O4; poly(styrene-co-acrylate acid); nanoparticles; bifunctional
Funding
- National Natural Science Foundation of China [50673033]
- National Natural Science Foundation of Jilin Province [201115011]
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Magnetic/antibacterial bifunctional nanoparticles were fabricated through the immobilization of antibacterial N-halamine on silica-coated Fe3O4-decorated poly(styrene-co-acrylate acid) (PSA) nanoparticles. The samples were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectra (XPS), X-ray diffraction (XRD), energy-dispersive X-ray spectrometry (EDX), Fourier transform infrared (FTIR), and thermogravimetric analysis (TGA). The N-halamine was developed from the precursor 5,5-dimethylhydantoin (DMH) by chlorination treatment, and experimental results showed that the loading amount of DMH on the silica-coated Fe3O4-decorated poly(styrene-co-acrylate acid) nanoparticles was adjustable. The as-synthesized nanoparticles exhibited superparamagnetic behavior and had a saturation magnetization of 1893 emu g(-1). Antibacterial tests showed that the resultant nanoparticles displayed enhanced antibacterial activity against both Gram-positive and Gram-negative bacteria compared with their bulk counterparts.
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