Hybrids of silver nanowires and silica nanoparticles as morphology controlled conductive filler applied in flexible conductive nanocomposites |
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| Affiliation: | 1. School of Chemical Engineering, University of Tehran, P.O. Box 11155-4563, Tehran, Iran;2. Leibniz-Institut für Polymerforschung Dresden e.V., Hohe Strasse 6, D-01069 Dresden, Germany;3. Department of Polymer Engineering & Color Technology, Amirkabir University of Technology, Tehran, Iran;4. Polymer Group, Faculty of Sciences, Ferdowsi University of Mashhad, Mashhad, Iran;1. College of Bioresources Chemical and Materials Engineering, Shaanxi University of Science & Technology, Xi’an 710021, China;2. National Demonstration Center for Experimental Light Chemistry Engineering Education, Shaanxi University of Science & Technology, Xi’an 710021, China;3. Xi’an Key Laboratory of Green Chemicals and Functional Materials, Xi’an 710021, China;4. Shaanxi Collaborative Innovation Center of Industrial Auxiliary Chemistry and Technology, Shaanxi University of Science & Technology, Xi''an 710021, China;5. Shaanxi Key Laboratory of Macromolecular Science and Technology, School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, Xi''an, China;1. Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, PR China;2. Institute of Environmental Engineering, ETH Zurich, CH-8093 Zurich, Switzerland |
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| Abstract: | Flexible conductive polymer nanocomposites based on silver nanowires (AgNWs) have been widely studied to develop the next generation of flexible electronics. However, AgNWs tend to aggregate in polymer matrix that usually results in high percolation threshold. In this study, nonconductive silica nanoparticles (nano-SiO2) were successfully co-assembled on AgNWs to form AgNWs/nano-SiO2 hybrids and waterborne polyurethane (WPU) conductive nanocomposites filled with the hybrids were prepared. The results show that the resistivity of WPU nanocomposites filled with AgNWs/nano-SiO2 hybrids decreased about 5000 times and the percolation threshold decreased from 10.6 vol% to 3.6 vol% due to AgNWs distribute more uniformly in WPU with the help of nano-SiO2. The further study to mechanism of interactions between AgNWs and nano-SiO2 suggest that the promotion of dispersion is attributed to hydrogen bonding and van der Waals force. The WPU nanocomposites embedded with AgNWs/nano-SiO2 hybrids present excellent mechanical adhesiveness, flexibility and thermal stability. |
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| Keywords: | A. Polymer-matrix composites (PMCs) A. Hybrid A. Nano-structures B. Electrical properties |
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