Abstract
Electrical conductivity of polymer nanocomposites (PNCs) is highly dependent on distribution of the conductive material within the polymer matrix, which is often challenging to achieve via conventional methods. This work presents the use of a graphene oxide (GO)-polyacrylamide (PAM) hydrogel that can be dried and reduced into a porous reduced GO-PAM (rGO-PAM) scaffold as a precursor for the fabrication of PNCs. In situ cross-linking of poly(ethylene-glycol) diacrylate (PEGDA) oligomers, polymerization of 2-hydroxyethyl methacrylate (HEMA) monomers, and curing epoxy resins inside the pores of rGO-PAM scaffolds resulted in the successful fabrication of rGO-PAM/xPEGDA, rGO-PAM/poly(HEMA), and rGO-PAM/epoxy nanocomposites, respectively. These PNCs showed similar electrical conductivities (4.24 ± 1.17, 4.36 ± 1.36, and 3.33 ± 0.35 S/mm), which elucidates the robustness of the fabrication approach. This is the first report of the preparation of an isotropic rGO-based porous scaffold used in designing PNCs that can host several types of polymers while maintaining its electrical performance.
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