期刊
POLYMER TESTING
卷 74, 期 -, 页码 138-151出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.polymertesting.2018.12.021
关键词
Diels-Alder reaction; Self-healing polymer; Graphite nanoplatelets; Epoxy nanocomposite
资金
- Department of Science and Technology, India under DST-FIST Program [SR/FST/ETI-373/2014]
- National Institute of Technology, Silchar
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 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 similar to 87% with multiple times healing capability. The tensile strength and modulus were also significantly increased by similar to 242% and similar to 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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