Developing functional epoxy/graphene composites using facile in‐situ mechanochemical approach

Abstract

The awareness of developing eco-friendly polymer composites via green chemistry attract much attention in the recent years. In the current work, we explore preparing functional epoxy/ graphene nanocomposites using mechanochemical approach. Graphene platelets (GnPs) were modified with long-chain surfactant via high-energy ball milling. Modified-GnPs (m-GnPs) promote the dispersion quality and interface strength with epoxy matrix leading to higher mechanical properties, and better electrical and thermal conductivity compared to unmodified GnPs system. At 2.0 vol% m-GnPs, elastic modulus, tensile strength, and thermal conductivity of epoxy were improved by 889%, 163%, and 105%, respectively. In addition, percolation threshold of electrical conductivity was observed at 0.71 vol% m-GnPs. Halpin-Tsai micromechanical model was able to predict the elastic modulus of the epoxy/GnP nanocomposites. The model results were compared experimental measurements. Furthermore, the measurements showed epoxy/m-GnP film possess high sensitivity to mechanical strains and impact loads. The current work gives a step forward to use mechanochemistry approach in the production of functional epoxy/graphene composites.

Preparation of high‐performance bismuthene thermoelectric composites doped with graphene using UV‐curing 3D printing technology

“…Graphene nanoplatelets (GNP) is a typical 2D nanomaterial that can increase the electrical conductivity of composites. [36][37][38][39] As an illustration Kumar et al 40 improved the electrical conductivity of Bi 2 Te 3 composites by 111% by adding GNP. Therefore, GNP was selected as the third phase into the UV-sensitive resin to enhance the thermoelectric performance of the composite.…”

“…This nano‐composite film had impressive ZT values compared to their counterparts at room temperature. Graphene nanoplatelets (GNP) is a typical 2D nanomaterial that can increase the electrical conductivity of composites 36–39 . As an illustration Kumar et al 40 improved the electrical conductivity of Bi 2 Te 3 composites by 111% by adding GNP.…”

Supramolecular-Wrapped α-Zirconium Phosphate Nanohybrid for Fire Safety and Reduced Toxic Emissions of Thermoplastic Polyurethane

“…In addition, the polystyrene composite showed promising inhibition for bacterial growth exhibited . Nanomaterials proved to be an effective approach for enhancing the physical properties (such as thermal and electrical conductivity) and mechanical performance of polymeric materials at low-volume fractions. − Recently, they are also investigated as FRs for polymers in conjunction with traditional FRs where synergistic effect between the two additives was often reported. − Most of the traditional FRs work in the gas phase, while nanomaterials suppress the flammability of a polymer in the solid phase. Both additives (traditional FRs and nanomaterial-based FRs) complement each other leading to high flame retardancy and simultaneously high mechanical performance .…”

A high-performance, sensitive, low-cost LIG/PDMS strain sensor for impact damage monitoring and localization in composite structures

“…For instance, graphene-based flexible sensors have demonstrated high sensitivity and an excellent pressure response, making them highly promising for SHM [15][16][17][18]. These sensors offer a wide strain monitoring range and can be prepared using a simple method [16,19].…”