The investigation of characteristics of electrospun Ag/polymer fibers and conductive films fabricated by Polyol reduction process
| Autor: | Kun-Hao Hung, 洪琨皓 |
|---|---|
| Rok vydání: | 2014 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 102 We propose a near-field electrospinning process (NFES) technology which combines organic polymer and silver nanoparticles (AgNPs) and silver nanowires (AgNWs) to fabricate transparent, orderly AgNWs conductive composite fibers. The AgNWs are investigated by the deployed parameters of Polyol method including reaction temperature, reaction time, rate of stirring, rate of adding AgNO3 and the proportion of others reactants. The Taguchi method is used to fabricate optimal AgNWs solution and collect nano-composite fibers. The silver nanowire composite fibers are investigated by the controlling of deployed parameters including rate of electrospinning, the electric field, stirring rate and time, added polymer, the amount of AgNPs and the proportion of Ethanol. The composite fibers fabricated with electrospinning are analyzed to obtain the morphology, the relation between film thickness and transmittance, material characteristics and the sheet resistance of film. The material characteristic of AgNWs and the residual polymer of the deployed AgNWs are analyzed. From the results, the 8-12wt% PVP and 25wt% PVA are the best deployed parameter. The AgNWs solution with specific deployed parameter can be used to fabricate composite fibers. However, the AgNWs in the fibers are broken when the applied voltage is over 14 KV. In this study, the AgNWs with 26 nm diameter and 10µm length and 0.017 Ω/sq sheet resistance of film can be fabricated. From the result of transmittance measurement, the thickness of silver nanowires film increases 100Å and the transmittance decreases 5%. Moreover, from the measurement of Transmission Electron Microscopy (TEM), there is still 1~2 nm PVP existing on the (100) side of silver nanowire. Moreover, the sheet resistance of PVP/AgNPs/PANi composite conductive film and composite conductive fibers is 213.690 Ω/sq and 220 KΩ/sq. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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