期刊
MACROMOLECULAR MATERIALS AND ENGINEERING
卷 302, 期 6, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/mame.201700069
关键词
antibacterial coatings; poly(2-(dimethylamino) ethyl methacrylate); polymer brushes; quaternization; silver nanoparticles
资金
- Program for New Century Excellent Talents in University [NCET-12-1064]
- National Natural Science Foundation of China [31470610]
- Natural Science Foundation of Tianjin [15JCZDJC32600]
A simple strategy to fabricate bifunctional antibacterial coatings via in situ synthesis and incorporation of silver nanoparticles (AgNPs) into quaternized poly(2-(dimethylamino) ethyl methacrylate) (qPDMAEMA) brushes without using any reducing agents is reported. PDMAEMA brushes are prepared on Si wafer substrates via surface-initiated reverse atom transfer radical polymerization, which then are quaternized with ethyl bromide and hexyl bromide, respectively. The resulting qPDMAEIVIA-AgNP nanocomposite coatings are characterized by using Fourier-transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS), field emission scanning electron microscope (FE-SEM), and Raman spectroscopy. FE-SEM and Raman results indicate that the AgNPs with an average diameter of 35 nm are successfully loaded into the qPDMAEMA brushes. Furthermore, the antibacterial activities of the qPDIVIAEMA-AgNP nanocomposite coatings against Gram-positive Staphylococcus aureus and Gram-negative Escherichia coli are investigated by both disc diffusion and colony-forming unit methods. The results show excellent antibacterial properties of the nanocomposite coatings. The influence of the length of the quaternization agents on their antibacterial properties is also investigated.
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