Journal
COMPOSITES PART B-ENGINEERING
Volume 67, Issue -, Pages 564-570Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesb.2014.08.013
Keywords
Polymer-matrix composites (PMCs); Electrical properties; Mechanical properties
Funding
- National Natural Science Foundation of China [51125010, 51221002]
- Specialized Research Fund for the Doctoral Program of Higher Education of China [20100010110006]
- Fundamental Research Funds for the Central Universities [ZY1308, ZY1354]
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Simultaneous reduction and surface functionalization of graphene oxide (GO) was achieved by refluxing GO with a diamine, polyetheramine (D230) at 95 degrees C followed by thermal treatment at 120 degrees C. The D230-treated GO (GO-D230) exhibits a high electrical conductivity of 1.0 S/m, much higher than that of GO, due to the chemical and thermal reduction. The incorporation of GO-D230 significantly improves the electrical conductivity of epoxy, exhibiting a sharp transition from electrically insulating to conducting with a low percolation threshold of 0.78 vol%. With 2.7 vol% of GO-D230, the electrical conductivity of its epoxy nanocomposite is 1.0 x 10(-4) S/m, nearly 11 orders of magnitude higher than that of neat epoxy; meanwhile, compared to the low Young's modulus and tensile strength of the rubbery epoxy, those of the nanocomposite are increased by 536% and 269%, respectively. (C) 2014 Elsevier Ltd. All rights reserved.
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