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Click coupled stitched graphene sheets and their polymer nanocomposites with enhanced photothermal and mechanical properties |
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| Affiliation: | 1. School of Materials Science and Engineering, Southweast Petroleum University, Chengdu 610500, P.R.China;2. State key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, P.R.China;3. School of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500, P.R.China;1. Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore;2. NeuroCure Clinical Research Center, Charité University Medicine, Berlin, Germany;3. Clinical and Experimental Multiple Sclerosis Research Center, Department of Neurology, Charité University Medicine, Berlin, Germany;4. Division of Neurology, Department of Medicine, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia;5. Department of Neurology, National Neuroscience Institute, Singapore;6. Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore |
| Abstract: | The chemically stitched graphene oxide (GO) sheets were obtained using a click chemistry reaction between azide-functionalized GO and alkyne-functionalized GO. The click coupled GO (GO-click-GO) sheets showed the largely increased electrical conductivity and near infrared laser-induced photothermal properties compared to the GO sheets, which result from formation of triazole ring as a bridging linker between the GO sheets. The polyurethane (PU) nanocomposites incorporating the GO-click-GO sheets exhibited enhanced mechanical properties of breaking stress and modulus than the GO/PU nanocomposites. The modulus of GO-click-GO/PU nanocomposites was higher than that of the GO/PU nanocomposites at the same filler loading of 0.1 and 0.5 wt%. The GO-click-GO/PU nanocomposites also showed a significantly improved photothermal properties compared to the GO/PU nanocomposites at the same filler loading. The click coupled stitched GO sheets in this study can be used as the superior reinforcing fillers for mechanically and photothermally high performance polymer nanocomposites. |
| Keywords: | A Nanocomposites A Graphene A Polymer-matrix composites (PMCs) B Mechanical properties |
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