Electrospun hybrid nanofibers based on chitosan or N-carboxyethylchitosan and silver nanoparticles.
Hybrid nanofibers from chitosan or N-carboxyethylchitosan (CECh) and silver nanoparticles (AgNPs) were prepared by electrospinning using HCOOH as a solvent. AgNPs were synthesized in situ in the spinning solution. HCOOH slowed down the cross-linking of the polysaccharides with GA enabling the reactive electrospinning in the presence of poly(ethylene oxide) (PEO). EDX analyses showed that AgNPs are uniformly dispersed in the nanofibers. Since AgNPs hampered the cross-linking of chitosan and CECh with GA in the hybrid fibers, the imparting of water insolubility to the fibers was achieved at a second stage using GA vapors. The surface of chitosan/PEO/AgNPs nanofibers was enriched in chitosan and 15 wt.-% of the incorporated AgNPs were on the fiber surface as evidenced by XPS.
Laboratory of Bioactive Polymers, Institute of Polymers, Bulgarian Academy of Sciences, Acad. G. Bonchev St Bl. 103A, 1113 Sofia, Bulgaria.
Hristo
H
Penchev
Dilyana
D
Paneva
Nevena
N
Manolova
Iliya
I
Rashkov
D048271:Chitosan / Q000737:chemistry*; D055664:Electrochemical Techniques; D008422:Materials Testing; D008855:Microscopy, Electron, Scanning; D015394:Molecular Structure; D053758:Nanoparticles / Q000737:chemistry*; D049329:Nanostructures / Q000737:chemistry*; D012834:Silver / Q000737:chemistry*; D012997:Solvents / Q000737:chemistry; D013499:Surface Properties
D012997:Solvents; D012834:Silver; D048271:Chitosan