Journal
MATERIALS & DESIGN
Volume 139, Issue -, Pages 372-379Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.matdes.2017.11.023
Keywords
Graphene; Mechanical properties; Nanocomposites; Noncovalent functionalization
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Funding
- Wisconsin Institute for Discovery (WID) at the University of Wisconsin-Madison
- China Scholarship Council
- Startup Research Fund of Zhengzhou University [32210508]
- University key research project of Henan Province [18A430031]
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In this work, non-covalently functionalized reduced graphene oxide (rGO) reinforced poly(vinyl alcohol) (PVA) nanocomposites were prepared by solution mixing. The agglomeration of graphene sheets was prevented by using surface modifying agent poly(sodium 4-styrenesulfonate) (PSS). The improved mechanical properties, including the Young's modulus and tensile strength of the PVA/rGO nanocomposites compared to neat PVA were attributed to the strong interactions between PVA and rGO such as pi-pi, hydrogen bonding, and CH-pi. A 55% maximum increase in the modulus was obtained by adding only 0.1 wt% rGO, and an increase of 48% in tensile strength was achieved by adding 0.3 wt% rGO. In addition, the thermal properties of the nanocomposites were also improved, which was attributed to the restriction of graphene oxide (GO)/rGO sheets on the chain mobility of polymers on the GO/rGO sheets surface. (C) 2017 Elsevier Ltd. All rights reserved.
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