Synthesis and Properties of Nanocomposites Using Functionalized Graphene Oxide
- Synthesis and Properties of Nanocomposites Using Functionalized Graphene Oxide
- 박옥경; 유남호; 이중희; 구본철
- functionalized graphene oxide; Nanocomposites; polyimide; mechanical properties
- Issue Date
- International conference on Organized Molecular Films
- The functionalized graphene oxide can be used to develop multifunctional polymer nanocomposites. Highly conductive reduced graphene oxide (R-GO) are synthesized by in situ thermochemical synthesis technique. The surface functionalization of GO was carried out with aryl diazonium salt including 4-iodoaniline to form phenyl functionalized GO (I-Ph-GO). The thermochemically reduced I-Ph-GO (R-I-Ph-GO) showed high conductivity (42,000 S/m) compared to R-GO (8,000 S/m). The I-Ph-GO was used to fabricate conductive polyimide (PI) nanocomposites by in-situ polymerization method. The electrical conductivity of the R-I-Ph-GO)/PI (1/99 w/w) nanocomposites was 5.2×10-2 S/m, which is about 107 times higher than that of the reduced graphene oxide (R-GO)/PI (1/99 w/w) nanocomposites. We also report an effective way to fabricate mechanically strong and multifunctional PI nanocomposites using aminophenyl functionalized graphene nanosheet (NH2-Ph-GNS). The electrical conductivity of APGNS/PI (3:97 w/w) was 6.6×10-2 S/m which was about 1011 times higher than that of pure PI. Furthermore, the modulus of APGNS/PI was increased from 2.3 GPa to 16.5 GPa, and tensile strength was increased from 75 MPa to 138 MPa.
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