Interfacial bonding between graphene oxide coated carbon nanotube fiber and cement paste matrix

Improving Interfacial Adhesion of Graphite/Epoxy Composites by Surface Functionalization

“…Subsequently, the cross-linked models were fully equilibrated for 2 ns. Graphite with or without functional groups is shown in Figure d; the number of attracted functionalized groups was approximately 5%, consistent with the functional degree in real experiments. , …”

“…Epoxy resin-reinforced graphite matrix composites comprising curing agents have wide-ranging applications in fuel cell bipolar plates. , During the extended service life of bipolar plates made of graphite/epoxy resin (G/EP) composites, external loads impose constant forces in the interfacial region, , potentially reducing the performance and lifespan of the bipolar plates. , So the performance of composite bipolar plates is influenced by the interaction and bonding quality between graphite and epoxy resin. , One common problem is the inadequate bonding strength between the graphite and resin, which would lead to premature delamination or peeling of the component . In addition, the interface may also become detached or experience pull-out under external forces, resulting in loss of connection and eventual cracking or breaking of the composite plate .…”

“…The interface properties of G/EP have been enhanced through methods including interfacial bonding, resin modification, and interface grafting . One of the most effective methods for improving interfacial adhesion is appropriately modifying the graphite surface. , To that end, functional groups have been incorporated onto the graphite surface to modify the interface between graphite and resin. New composite materials and interface modification techniques have also been explored .…”

“…7,8 One common problem is the inadequate bonding strength between the graphite and resin, which would lead to premature delamination or peeling of the component. 9 In addition, the interface may also become detached or experience pull-out under external forces, resulting in loss of connection and eventual cracking or breaking of the composite plate. 10 These issues can lead to gas leakage in the fuel cell, reducing efficiency and stability.…”

“…Graphite with or without functional groups is shown in Figure 1d; the number of attracted functionalized groups was approximately 5%, consistent with the functional degree in real experiments. 9,17 The adsorption model (Figure 1e), approximately 1540 atoms in periodic cells with lattice parameters of 61 Å × 38 Å × 60 Å, was used to investigate the relationship among components, structure, and properties of the composite system and the effect of functionalized graphite on the formation of the interface between resin and graphite. The epoxy model was composed of 96 DGEBA and 48 DDS molecules.…”