Yiyao Luo, Ke Yan, Yanjun Li, Qiang Zhao, Xiaoya Zhang, Weiyu Jiang, Bo Wen, Sheng Zou, Fei Chen, Jun Hong
The effects of sintering pressure, sintering temperature, and holding time on the densification behavior and mechanical properties of 0.5 wt% graphene nanoplatelet (GNP)/polytetrafluoroethylene (PTFE) composites fabricated by spark plasma sintering (SPS) were investigated using an orthogonal experimental design. Among the three factors, sintering pressure exerted the greatest influence on both density and flexural modulus, followed by sintering temperature and holding time. The optimized SPS condition for preparing 0.5 wt% GNP/PTFE composites was determined to be 10 MPa and 340 °C for 30 min. Compared with pure PTFE prepared under the same optimized SPS condition, the maximum increase in flexural modulus reached 55.48%, highlighting the effectiveness of SPS parameter optimization in improving the stiffness of GNP/PTFE composites.