Compared to carbon nanotubes (CNTs), graphene possesses high strength due to wrinkled surface texture caused by a high density of surface defects which benefits more contact with the polymer material than a rolled-up CNT. In the present review, we have discussed and compared the various properties of CNTs (1-D) and graphene (2-D) obtained in experimental results. The effects of covalent and non-covalent functionalization of CNTs and graphene on the properties of its composites have also been reviewed and compared. A comparative analysis has been carried out between CNTs and graphene-reinforced polymer composites. Furthermore, the synergetic effects of CNTs and graphene hybrid nanofiller on the mechanical properties of polymer composites have also been briefly discussed. Finally, this review concludes with the potential application and future challenges are discussed with regards to filler and their polymer composites.

与碳纳米管（CNT）相比，石墨烯具有高强度，这是由于高密度的表面缺陷引起的表面起皱，与卷曲的CNT相比，石墨烯与聚合物材料的接触更多。在本综述中，我们已经讨论并比较了实验结果中获得的CNT（1-D）和石墨烯（2-D）的各种特性。碳纳米管和石墨烯的共价和非共价官能化对其复合材料性能的影响也已进行了审查和比较。在碳纳米管和石墨烯增强的聚合物复合材料之间进行了比较分析。此外，还简要讨论了碳纳米管和石墨烯杂化纳米填料对聚合物复合材料力学性能的协同作用。最后，