| 초록 |
In this study, a complex-mediated synthetic growth method was used to fabricate Ag nanoparticles embedded poly(vinyl alcohol) (PVA) nanofibers in an aqueous solution. Azobisisobutyronitrile (AIBN) played a crucial role in the preparation of the Ag–PVA nanofibers, through its cyano groups. AIBN was used to assemble the Ag ions to form Ag complexes in the early stages of the reaction. As the reaction temperature got close to 60 oC, the C–N bonds of AIBN decomposed, and thus the Ag compounds became disassembled. During this stage, Ag nanoparticles were aligned with a PVA assistant, which acted as a gelator and stabilizer for the formation of fibrous nanostructures under magnetic stirring conditions. As a result, PVA nanofibers with a diameter of ca. 35 nm were synthesized, embedded Ag nanoparticles (diameter: ca. 8 nm) compactly in the inner part of the fiber. The formation of Ag–PVA composite nanofibers was systematically investigated with field-emission scanning electron microscopy, transmission electron microscopy, Fourier transform infrared spectroscopy, and X-ray photoelectron spectroscopy. Additionally, we performed several control experiments and proposed a probable mechanism for the synthesis of Ag–PVA composite nanofibers. |
