Zhao Zhenhua, Li Rui, Zhao Chen, Pei Jianzhong
China Municipal Engineering, Northwest Design & Research Institute Co., Ltd., No.459 Dingxi Road, Lanzhou 730000, China.
Changan University, School of Highway, 126 Middle Sect, South Second Ring Rd, Xi'an 710064, China.
Materials (Basel). 2025 Mar 6;18(5):1185. doi: 10.3390/ma18051185.
The design of piezoelectric roads is one of the future directions of smart roads. In order to ensure the environmentally friendly and long-lasting use of piezoelectric road materials, lead-free piezoelectric ceramics (barium titanate), polymer piezoelectric materials (polyvinylidene fluoride), and conductive particles (conductive carbon black and graphene) were used to prepare composite piezoelectric materials. The electrical performance was studied by the conductivity, dielectric properties, and piezoelectric properties of the composite materials. Then, the mechanical properties of the composite material were investigated by load compression tests. Finally, the microstructure of the composite materials was studied. The results showed that as the amount of conductive particles increased, the electrical performance was improved. However, further addition of conductive particles led to a decline in the electrical performance. The addition of conductive particles had a minimal effect on the mechanical properties of composite materials. The composite material met road use requirements. The overall structure of the composite materials was compact, with a clear wrapping effect of the polymer, and good interface compatibility. The addition of conductive carbon black and graphene had no significant impact on the structure of the composite materials.
压电道路的设计是智能道路未来的发展方向之一。为确保压电道路材料环保且能长期使用，采用了无铅压电陶瓷（钛酸钡）、聚合物压电材料（聚偏氟乙烯）和导电颗粒（导电炭黑和石墨烯）来制备复合压电材料。通过复合材料的电导率、介电性能和压电性能研究其电学性能。然后，通过载荷压缩试验研究复合材料的力学性能。最后，研究复合材料的微观结构。结果表明，随着导电颗粒用量的增加，电学性能得到改善。然而，进一步添加导电颗粒会导致电学性能下降。导电颗粒的添加对复合材料的力学性能影响极小。该复合材料满足道路使用要求。复合材料的整体结构致密，聚合物具有明显的包裹效果，界面相容性良好。添加导电炭黑和石墨烯对复合材料的结构没有显著影响。
