Abstract
In this study, graphene nanoplatelets were integrated into a fluoroelastomer matrix to improve the performance of polymer nanocomposites specifically for O-ring production. The enhanced materials were subjected to field testing against sour condensate, demonstrating their potential for superior durability and resistance in challenging environments. This study evaluated the effects of graphene nanoplatelet on the mechanical properties and thermal stability of the graphene nanoplatelet/fluoroelastomer nanocomposite compared to the standard fluoroelastomer. Key properties such as tensile strength, hardness, and tear strength were assessed before and after aging tests, supported by transmission electron microscopy and field emission scanning electron microscopy analyses. The O-rings were tested in the mechanical seals of centrifugal pumps with sour condensate applications. The results demonstrated that the addition of graphene significantly improved moduli, tensile strength, hardness, and tear strength, while reducing elongation at break. The moduli of the nanocomposite at 10%, 50%, and 100% strain increased by 103.90%, 156.40%, and 130.30%, respectively, compared to those of the fluoroelastomer. Additionally, the nanocomposite exhibited improvements in tensile strength, hardness, and tear strength by 9.94%, 11.80%, and 50.80%, respectively, relative to fluoroelastomer. However, the elongation at break of the nanocomposite decreased by 58.22% compared to that of the fluoroelastomer. Post-thermal aging tests revealed enhanced thermal stability in the nanocomposite. Field tests confirmed the nanocomposite O-rings’ effectiveness against sour condensate, successfully preventing issues like explosive decompression, with no signs of degradation. Overall, the nanocomposite O-rings exhibited a longer lifespan compared to traditional and very expensive perfluoroelastomer O-rings.
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