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Erschienen in:
21.09.2018
Formation of unique three-dimensional interpenetrating network structure with a ternary composite
Erschienen in: Journal of Materials Science: Materials in Electronics | Ausgabe 21/2018
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Abstract
Ternary composite of reduced graphene oxide/multi-walled carbon nanotubes (RGO/MWCNT)/polyimide (PI) with high-performance mechanical and electrical properties was synthesized via in situ polymerization. The unique three-dimensional interpenetrating network structure conferred the conductive pathways for electrons, resulting from the strong interfacial covalent bonds between RGO/MWCNT and the PI matrix. The electrical conductivity of (RGO/MWCNT)/PI reached 4.4 × 10− 4 S m−1 with the filler loading concentration at an extremely low value (0.2 wt%), which was significantly higher than that of the neat PI. The (RGO/MWCNT)/PI composite films exhibited high tensile strength (up to 462 MPa) and tensile modulus (260 MPa). Furthermore, the introduction of RGO/MWCNT enhanced the thermal stability of the (RGO/MWCNT)/PI composites (from 579 to 623 °C). The composite film is expected to be extensively applied in the field of electronics, solar cells and biosensors.