In the present work, polyacrylonitrile (PAN) nanofibers reinforced dental composites were investigated to achieve the improved interfacial adhesion between the PAN nanofiber and resin matrix using surface modification of nanofibers. PAN nanofibers mat were prepared by electrospinning and then, surface treated with the activated bisphenol A glycidyl methacrylate (Bis-GMA)/triethyleneglycol dimethacrylate (TEGDMA) (50/50 mass ratio) dental resin followed by photo-curing. Also, the treated nanofibers mat was milled into a powder to achieve the uniform distribution of nanofibers in the matrix resin. The reinforced dental composite were prepared by mixing the various mass fraction of the powder (0.5–15 wt%) with the Bis-GMA/TEGDMA dental monomers. The effect of weight ratio of surface-modified nanofibers to blend resin on the chemical structure, morphology, compression and flexural properties, color and polymerization shrinkage of dental composites was evaluated. The results showed that using surface-treated nanofibers with content of 5 wt% enhanced the compression strength, flexural strength, flexural modulus and work of rupture of the resultant dental composite by factors of 23%, 7%, 80%, and 145%, respectively, comparing to the unreinforced neat resin. Also, the polymerization shrinkage reduces by 37%. These significant improved properties of the dental composite could be due to the semi-interpenetration network formation between surface-modified nanofibers and resin matrix and well distribution of nanofibers in the dental resin. Further increasing the nanofiber content led to poor mechanical properties of obtained dental composites. The results also, revealed that the color of resin composite could be whiter using modified PAN nanofibers as the filler.

在目前的工作中，研究了聚丙烯腈 (PAN) 纳米纤维增强的牙科复合材料，以使用纳米纤维的表面改性来改善 PAN 纳米纤维和树脂基质之间的界面粘附。通过静电纺丝制备PAN纳米纤维垫，然后用活化的双酚A甲基丙烯酸缩水甘油酯（Bis-GMA）/三乙二醇二甲基丙烯酸酯（TEGDMA）（50/50质量比）牙科树脂进行表面处理，然后光固化。此外，将处理过的纳米纤维垫研磨成粉末，以实现纳米纤维在基体树脂中的均匀分布。通过将不同质量分数的粉末（0.5-15wt%）与 Bis-GMA/TEGDMA 牙科单体混合来制备增强牙科复合材料。表面改性纳米纤维与共混树脂的重量比对化学结构的影响，对牙科复合材料的形态、压缩和弯曲性能、颜色和聚合收缩进行了评估。结果表明，使用含量为 5 wt% 的表面处理纳米纤维使所得牙科复合材料的压缩强度、弯曲强度、弯曲模量和断裂功提高了 23%、7%、80% 和 145%，分别与未增强的纯树脂相比。此外，聚合收缩率降低了 37%。牙科复合材料的这些显着改善的性能可能是由于表面改性纳米纤维和树脂基质之间形成的半互穿网络以及纳米纤维在牙科树脂中的良好分布。进一步增加纳米纤维含量导致所得牙科复合材料的机械性能较差。结果也是，