Journal
CHINESE JOURNAL OF POLYMER SCIENCE
Volume 32, Issue 8, Pages 975-985Publisher
SPRINGER
DOI: 10.1007/s10118-014-1488-8
Keywords
Graphene oxide; Epoxy; Chemical reduction; Electrical conductivity; Glass transition temperature
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Funding
- National Natural Science Foundation of China [51125010, 51221002]
- Specialized Research Fund for the Doctoral Program of Higher Education of China [20100010110006]
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Simultaneous functionalization and reduction of graphene oxide (GO) is realized by refluxing of GO suspension with polyetheramine (D2000) followed by thermal treatment at 120 A degrees C. Compared to GO, the D2000-treated GO (GO-D2000) becomes hydrophobic, thermally stable and highly conductive with an electrical conductivity of 11 S/m, which is almost 8 orders of magnitude higher than that of GO. Due to the high conductivity and improved dispersion of GO-D2000, its epoxy nanocomposites exhibit a sharp transition from electrically insulating to conducting with a low percolation threshold of 0.71 vol%. With 3.6 wt% GO-D2000, the glass transition temperature of the epoxy nanocomposite is 27 K higher than that of neat epoxy.
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