Add time:09/25/2019         Source:sciencedirect.com

In this work, we report matrix and interfacial healing capabilities for hybrid DA-based polymer nanocomposites. Thermo-reversible self-healing nanocomposites were prepared by reinforcing Bismaleimide (cas 13676-54-5) grafted graphite nanoplatelets (B-GNPs) in a DA-based hybrid polymer matrix (HPM). The maleimide functional moieties were found grafted on B-GNPs that form globular networked structures on the nanoplatelets. Data from the TG-DSC revealed increased exothermic peaks corresponding to DA and retro-DA bond formation due to the incorporation of B-GNPs in HPM. This indicates the formation of DA bonds proficient enough to establish self-healing at the interfaces of B-GNPs and HPM. We also found that incorporation of B-GNPs in HPM having 40 wt% irreversible epoxy resin (DA40) has the potential to uplift the mechanical stability along with self-healing efficiency demonstrating successful interfacial healing. The resulting B-GNPs reinforced nanocomposites of DA40 showed maximum healing efficiency of ~87% with multiple times healing capability. The tensile strength and modulus were also significantly increased by ~242% and ~41% in comparison to pristine DA40. This study espouses the potential use of B-GNPs for multiple interfacial healing along with matrix healing of hybrid polymer nanocomposites.

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