Simultaneous photoinduced electron transfer and photoinduced CuAAC processes for antibacterial thermosets
Date
2017Source Title
Progress in Organic Coatings
Print ISSN
0300-9440
Publisher
Elsevier
Volume
105
Pages
252 - 257
Language
English
Type
ArticleItem Usage Stats
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Abstract
A combination of simultaneous photoinduced electron transfer and photoinduced CuAAC processes enables the in-situ preparation of antibacterial thermosets containing silver nanoparticles (AgNPs) in one-pot. Upon photolysis of photoinitator, the generated radicals not only reduce Cu(II) into Cu(I) activator to catalyst the CuAAC click reaction, but also simultaneously generate AgNPs from AgNO3 through electron transfer reaction. Due to their reduction potentials difference, the polymer matrix is formed before the formation of AgNPs, assisting to eliminate the agglomeration of them. The thermoset structures are confirmed by FT-IR and solubility tests, whereas the presence of AgNPs is proven by transmission electron microscopy with energy dispersive X-ray system analyzer. The samples containing 5 and 10% AgNPs exhibited strong inhibition zones, where all kinds of bacteria (gram-positive (Staphylococcus Aureus) and gram-negative (Escherichia Coli)) were killed in the surrounding of the film samples.
Keywords
Copper-catalyzed azide-alkyne cycloaddition click chemistryBacteria
Electron transitions
Electrons
Escherichia coli
Free radical reactions
High resolution transmission electron microscopy
Metal nanoparticles
Nanocomposites
Nanoparticles
Photolysis
Photopolymerization
Thermosets
Transmission electron microscopy
Antibacterial properties
Azide-alkyne cycloaddition
Electron-transfer reactions
Energy dispersive x-ray
Photo-induced electron transfer
Silver nanoparticles
Silver nanoparticles (AgNps)
Staphylococcus aureus
Silver
Permalink
http://hdl.handle.net/11693/37340Published Version (Please cite this version)
http://dx.doi.org/10.1016/j.porgcoat.2017.01.011Collections
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