The control of interfacial interaction between polymers and fillers is essential for the fabrication of high-performance polymer composites. In this work, poly(ether-ether-ketone)/silica (PEEK/SiO₂) and PEEK/SiO₂/graphene oxide (GO) composite were prepared by ball milling-ultrasonic dispersion combined with melt extrusion injection molding. GO nanosheets were introduced as the interfacial enhancer to improve interfacial binding between SiO₂ and PEEK. Mechanical tests showed that the incorporation of SiO₂ and GO greatly optimized the modulus, strength, and fracture toughness of the composites. The tensile strength and Young's modulus of the PEEK/SiO₂ composites increases with the increase of SiO₂ content. The maximum tensile strength and Young's modulus of the PEEK/SiO₂ composites are approximate 95.9 ± 0.6 MPa and 4.007 ± 0.005 GPa at 30 wt% of SiO₂, an increase of 6.4% and 21.2% than that of pure PEEK. The maximum tensile strength and Young's modulus of the PEEK/SiO₂/GO composite are further improved to approximate 101.5 ± 0.7 MPa and 4.62 ± 0.08 GPa at a GO content of 1.5% wt, which is 12.6% and 39.4% higher than that of pure PEEK. In addition, SEM images show that numerous HA formed on the surface of the PEEK/SiO₂/GO composite after immersion in SBF for 7 days, and the HA layer becomes gradually thicker after 14 days, implying the good osteogenic activity of PEEK/SiO₂/GO composites. Therefore, these results suggest that the use of GO as a novel filler surface modifier for the preparation of high-performance composites may become a novel interfacial design strategy for the development of high-performance composites.

聚合物和填料之间界面相互作用的控制对于高性能聚合物复合材料的制造至关重要。在这项工作中，聚醚醚酮/二氧化硅（PEEK/SiO ₂）和PEEK/SiO ₂ /氧化石墨烯（GO）复合材料通过球磨-超声分散结合熔融挤出注塑制备。引入GO纳米片作为界面增强剂以改善SiO ₂和PEEK之间的界面结合。力学测试表明，SiO ₂和GO的掺入极大地优化了复合材料的模量、强度和断裂韧性。的拉伸强度和PEEK的杨氏模量/的SiO ₂与二氧化硅的复合物增加增加₂内容。的最大拉伸强度和PEEK的杨氏模量/的SiO ₂复合材料是近似95.9±0.6兆帕和4.007±0.005 GPA在二氧化硅的30％（重量）₂，6.4％的增加，并且比纯PEEK的21.2％。PEEK/SiO ₂ /GO 复合材料的最大拉伸强度和杨氏模量进一步提高，GO 含量为 1.5% wt 时分别约为 101.5 ± 0.7 MPa 和 4.62 ± 0.08 GPa，比 GO的最大拉伸强度和杨氏模量分别提高了 12.6% 和 39.4%。纯 PEEK。此外，SEM图像显示PEEK/SiO ₂ /GO复合材料在SBF中浸泡7天后表面形成大量HA ，14天后HA层逐渐变厚，表明PEEK/SiO具有良好的成骨活性₂/GO 复合材料。因此，这些结果表明，使用 GO 作为新型填料表面改性剂制备高性能复合材料可能成为开发高性能复合材料的一种新型界面设计策略。