Mechanically Strong and Multifunctional Polyimide Nanocomposites Using Amimophenyl Functionalized Graphene Nanosheets
- Mechanically Strong and Multifunctional Polyimide Nanocomposites Using Amimophenyl Functionalized Graphene Nanosheets
- 박옥경; 황준연; 고문주; 이중희; 구본철; 유남호
- polyimide; graphene; nanocomposite
- Issue Date
- VOL 46, NO 9, 3505-3511
- We report an effective way to fabricate
mechanically strong and multifunctional polyimide (PI)
nanocomposites using aminophenyl functionalized graphene
nanosheet (APGNS). APGNS was successfully obtained
through a diazonium salt reaction. PI composites with different
loading of APGNS were prepared by in situ polymerization.
Both the mechanical and electrical properties of the APGNS/
PI composites were significantly improved compared with
those of pure PI due to the homogeneous dispersion of
APGNS and the strong interfacial covalent bonds between
APGNS and the PI matrix. 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 up to 16.5 GPa, which is approximately a 610% enhancement compared to that of pure PI,
and tensile strength was increased from 75 to 138 MPa. The water vapor transmission rate of APGNS/PI composites (3:97 w/w)
was reduced by about 74% compared to that of pure PI.
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