Interfacial and matrix healing of thermally reversible bismaleimide infused Graphene Nano Platelets reinforced polymer nanocomposite through Diels-Alder bonding

• Published in: Materials today communications Vol. 31; p. 103753
• Main Authors: Dhanaraju, Goteti, Golla, Sivaparwathi, Ben, B. Satish, Vikram, K. Arun
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01-06-2022
• Subjects: Functionalization; Graphene Nano Platelets; Mechanical properties; Self-healing efficiency; Self-healing nanocomposite; Mechanical properties; Self-healing nanocomposite; Graphene Nano Platelets; Self-healing efficiency; Functionalization
• ISSN: 2352-4928; 2352-4928
• DOI: 10.1016/j.mtcomm.2022.103753

The interfacial and matrix healing capability have been studied in this work for thermally reversible self-healing furan maleimide Diels Alder (FMDA) based hybrid polymer composite. FMDA composite with various weight ratios (0.5, 1.0, and 1.5 wt%) of bismaleimide infused Graphene Nano Platelets (GNPBm) was fabricated and characterized. FMDA with varying epoxy, GNPBm wt% were considered for mechanical and morphological features. Amine functionalization was used to address GNPBm aggregation, precise interface management. Thermal stability of functionalized GNPs were revealed from TG-DTA data. FE-SEM images attributes homogenous distribution, bismaleimide moieties infusion on GNPs. Successful integration of DA and retro-DA bonds of FMDA composite was confirmed with TG-DSC through exo-endothermic peaks. TDCB specimens were fabricated and tested to evaluate FMDA's self-healing efficiency. An improvement in Breaking load, Tensile strength, Elastic modulus, and Self-healing efficiency was observed in 45FMDA(Gr-1.0), these being 30 %, 162 %, 42 %, and 90 % respectively, when compared to pristine sample.
[Display omitted]
•Thermally reversible (DA-rDA) self-healing polymer with GNPBm was fabricated.•Restoration of mechanical integrity across fracture and extend the service life.•The GNPs agglomeration was addressed through silane group functionalization.•The developed composite provided crack redirection and self-healing capability.•TDCB specimens were fabricated and tested to find self-healing.