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Nuri Karakurt,Seckin Erden 한국섬유공학회 2022 Fibers and polymers Vol.23 No.12
Carbon fiber (CF) reinforced epoxy matrix composites were incorporated with 0.5, 1, 2, 4, 7, 10, and 15 wt%poly(amidoamine) (PAMAM) functionalized graphene oxide (GO) via matrix modification. GO was synthesized by chemicaloxidation and PAMAM dendrimer of generation 0.5 (G0.5) was used within the study. Surface chemistry of graphene wasanalyzed by X-ray photoelectron spectroscopy (XPS), which confirmed the oxidation and PAMAM functionalization(PAMAM-GO). After prepregging, laminated composites were manufactured by hot pressing. So produced CF/epoxy-PAMAM-GO composites were thermally analyzed by thermogravimetric analyses (TGA-DTG). The electrical conductivityof the composites was measured in three directions (fiber, transverse, and through-thickness). Mechanical properties wereexamined in means of interlaminar shear strength (ILSS) determined by short beam shear (SBS) tests. The neat graphene,GO, PAMAM-GO, and the fractured composite surfaces were imaged using scanning electron microscopy (SEM). As aresult, PAMAM-GO incorporation significantly enhanced the electrical properties of CF/epoxy composites. Thermal stabilityincreased while the ILSS values decreased.