Fabrication of Fullerene Anchored Reduced Graphene Oxide Hybrids and Their Synergistic Reinforcement on the Flame Retardancy of Epoxy Resin

Abstract

A C60-PEI-rGO hybrid was prepared by incorporating the fullerene (C60) on the surface of PEI-modified reduced graphene oxide (rGO) and then used to modify the epoxy (EP) resin. Subsequently, the structure of GO and C60-PEI-rGO hybrid were well characterized, showing that the C60 was homogenously anchored on the surface of PEI-rGO. The flame retardancy, mechanical properties, and thermal stability of as-prepared C60-PEI-rGO/EP nanocomposites were systematically investigated. Results show that the C60-PEI-rGO hybrid exhibits high flame retarding efficiency for EP. Specifically, the time to ignition of epoxy increases from 68 to 89 s with the addition of 1.0 wt% C60-PEI-rGO, which are unusual in polymer nanocomposites. In the meantime, the peaks of the heat release rate and total heat release of the modified epoxy reduce by 40.0% and 15.6%, respectively. The synergistic flame retardant mechanism of C60-PEI-rGO to EP is attributed to its unique structure combining both the high efficiency in capturing free radicals by C60, the barrier effect of layered of rGO and increase of crosslinking density of epoxy. It is shown that the thermal stability and mechanical properties of epoxy are simultaneously improved with the addition of C60-PEI-rGO. This work may pioneer a new and efficient method to fabricate fire retardant thermosetting resins with simultaneously other improved properties.Electronic supplementary materialThe online version of this article (10.1186/s11671-018-2678-z) contains supplementary material, which is available to authorized users.

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“…In addition, a new band at 1460 cm −1 (light blue block) appears in PEI-rGO which is assigned to the C–N stretching vibration. 40 These observations fully indicate the successful grafting of PEI molecules onto the GO surface, confirmed by the changes in ζ from −42.28 mV of GO to 32.35 mV of PEI-rGO (Fig. 1b).…”

Self‐Assembled Fullerene Nanostructures: Synthesis and Applications

“…[152] Alternative to this, recently, nanofillers have also been employed for stimulating the chemisorption instead of coupling reactions that avoid the interference of agglomeration. [153] However, the science of nanofillers is not new and similar to spacers applied since the early stages of research in nanographene. The principles of conventional donor-acceptor chemistry could be beneficial for the recently emerging photoinduced electron transfer for the synthesis of graphene-fullerene hybrid.…”

Optimization of Synthesis Conditions of β‐FeOOH Nanorods towards Antimicrobial Benefits

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