Complementary experimental and quantum mechanics approaches for exploring the mechanical characteristics of epoxy composites loaded with graphene oxide-polyaniline nanofibers

Graphite nanosheet/polyaniline nanocomposites: Effect of in situ polymerization and dopants on the microstructure, thermal, and electrical conduction properties

“…The GNS showed a characteristic absorption band centered at 1633 cm −1 , assigned to the C=C stretching of the aromatic graphene rings 45 . The band centered at 1385 cm −1 was attributed to the OH stretching vibration of the carboxyl, while the band at 1105 cm −1 is due to the CO stretching of COC or COH groups from chemical groups resulting from the chemical process of oxidation of natural graphite that were not totally degraded during the heat treatment 40,46 …”

“…45 The band centered at 1385 cm À1 was attributed to the OH stretching vibration of the carboxyl, while the band at 1105 cm À1 is due to the C O stretching of C O C or C OH groups from chemical groups resulting from the chemical process of oxidation of natural graphite that were not totally degraded during the heat treatment. 40,46 Pani-HCl showed typical absorptions of its emeraldine salt form, with bands at 1562 cm À1 and 1477 cm À1 attributed to the C=C stretching deformation of quinoid rings and benzenoid rings, respectively. 47,48 The absorption at 1300 cm À1 was attributed to the π electron delocalization induced in the polymer due to protonation or C N stretching of the secondary aromatic amine.…”

Hydroxyl-Terminated Triazine Derivatives Grafted Graphene Oxide for Epoxy Composites: Enhancement of Interfacial and Mechanical Properties

“…The peak value of GO was 10.86°, corresponding to an interlamellar spacing of 0.81 nm. This was due to the existence of oxygen-rich groups on both sides of the sheets and water molecules trapped between the sheets [34]. After partial reduction and TCT modification, the GO-TCT presented a weak diffraction peak at 10.57°and a strong diffraction peak at 20.9°, corresponding to an interlamellar spacing of 0.42 nm, which was ascribed to the structural defects and the triazine ring of TCT compensating for the GO [35].…”

The Side‐Chain Liquid Crystalline Epoxy Polymer Grafted Nanoparticles for the Thermal and Mechanical Enhancement of Epoxy Nanocomposites

“…The flexural strength of Al 2 O 3 ‐SLCEP1/epoxy nanocomposites increases by nearly 44.6%, the flexural modulus by 22.3%, and the impact strength by 228.9% (compared with neat epoxy); the flexural strength by about 17.5%, the flexural modulus by 13.2%, and the impact strength by 81.8% (compared with the raw Al 2 O 3 /epoxy nanocomposites). This is largely attributable to two aspects: (1) the dispersion of Al 2 O 3 in the matrix and (2) the interface interaction between the Al 2 O 3 nanoparticles and matrix . The static bond strength and stiffness of the composite interface often act a very important role in the ability of the material to transfer stress and elastic deformation from the matrix to the filler.…”