Edge-functionalized graphene-like platelets as a co-curing agent and a nanoscale additive to epoxy resin
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- Edge-functionalized graphene-like platelets as a co-curing agent and a nanoscale additive to epoxy resin
- Kim, Kyung-Su; Jeon, In-Yup; Ahn, Soo-Na; Kwon, Young-Do; Baek, Jong-Beom
- 4-aminobenzoic acid; Co-curing; Covalent link; Epoxy matrices; Friedel-crafts acylation; Functionalized; Graphite composites; Load transfer; Nano scale; Phosphorus pentoxide; Polar solvents; Polyphosphoric acids; Selective functionalization
- Issue Date
- ROYAL SOC CHEMISTRY
- JOURNAL OF MATERIALS CHEMISTRY, v.21, no.20, pp.7337 - 7342
- A newly developed method for the edge-selective functionalization of "pristine" graphite with 4-aminobenzoic acid was applied for the synthesis of 4-aminobenzoyl-functionalized graphite (AB-graphite) through a "direct" Friedel-Crafts acylation in a polyphosphoric acid (PPA)/phosphorus pentoxide medium (P(2)O(5)). The AB moiety at the edge of the AB-graphite played the role of a molecular wedge to exfoliate the AB-graphite into individual graphene and graphene-like platelets upon dispersion in polar solvents. These were used as a co-curing agent and a nanoscale additive to epoxy resin. The physical properties of the resulting epoxy/AB-graphite composites were improved because of the efficient load transfer between the additive and epoxy matrix through covalent links.
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