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

Abstract

An effective approach to the fabrication of progressive epoxy nanocomposites by the incorporation of hydroxyl-terminated dendrimers functionalized graphene oxide (GO-TCT-Tris) is reported. The relationship between surface grafting, chemical construction, morphology, dispersion, and interfacial interaction as well as the corresponding mechanical properties of the composites were studied in detail. It was shown that hydroxyl-terminated triazine derivatives have been resoundingly bonded onto the GO surface through covalent bonding, which effectively improved the dispersion and compatibility of GO sheets in epoxy resin. The tensile and flexural tests manifested that the GO-TCT-Tris/epoxy composites exhibited greater tensile/flexural strength and modulus than either the pure epoxy or the GO/epoxy composites. For GO-TCT-Tris (0.10 wt%)/epoxy composite, the tensile strength and elastic modulus increased from 63 ± 4 to 89 ± 6 MPa (41.27%) and from 2.8 ± 0.1 to 3.6 ± 0.2 GPa (28.57%), and the flexural strength and modulus increased from 106 ± 5 to 158 ± 6 MPa (49.06%) and from 3.0 ± 0.1 to 3.5 ± 0.2 GPa (16.67%), respectively, compared to the pure epoxy matrix. Moreover, the fractographic analysis also illustrated the ameliorative interfacial interaction between GO-TCT-Tris and epoxy matrix.

Mechanical properties of aerospace epoxy composites reinforced with 2D nano-fillers: current status and road to industrialization

“…UTS, impact strength and impact toughness increased by 62%, 51% and 148% for 0.7 wt% PBI–HPG–rGO/epoxy composite as compared to the neat resin, respectively. Ma et al 130 modified GO using hydroxyl-terminated triazine derivatives (GO–TCT–Tris). Flexural strength and modulus increased by 49% and 16% for 0.1 wt% GO–TCT–Tris/epoxy composite than the neat resin, respectively.…”

Multiscale Modeling of Epoxy-Based Nanocomposites Reinforced with Functionalized and Non-Functionalized Graphene Nanoplatelets

“…Even though chemical modification alters the strong sp 2 hexagonal structure into a weaker sp 3 structure, experimental studies have shown that it can improve the mechanical and other engineering properties of the produced nanocomposite [28][29][30][31][32][33][34]. This improvement is highly governed by the functional group type, molecular configuration, and concentration [35][36][37][38]. Despite the limited number of studies dedicated to investigating the effect of graphene nanoplatelet functionalization, there is a need for a systematic approach to understanding the role of different types of graphene nanoplatelet modification and functionalization on the resulting composite mechanical properties.…”

Photocatalytic hydrogen generation from a methanol–water mixture in the presence of g-C3N4 and graphene/g-C3N4

“…73 The CB and VB edge potentials of BM are about À1.56 and 1.1 V vs. NHE with 2.66 eV of band gap, respectively. For further discussion, the calculated work functions for graphene and g-C 3 N 4 were used according to the reference of Ma et al, 74 which were 4.55 eV and 4.34 eV, respectively. The g-C 3 N 4 exhibited the characteristics of an n-type semiconductor.…”