基于原子力显微镜的石墨烯对改性沥青微观结构的影响
Effect of Graphene on Modified Asphalt Microstructures Based on Atomic Force Microscopy.
作者信息
Li Xian, Wang Yanmin, Wu Yanling, Wang Huiru, Wang Qingliang, Zhu Xingxing, Liu Xiaocun, Sun Huadong, Fan Liang
机构信息
School of Traffic and Civil Engineering, Shandong Jiaotong University, Jinan 250300, China.
Shandong Transportation Institute, Jinan 250031, China.
出版信息
Materials (Basel). 2021 Jul 1;14(13):3677. doi: 10.3390/ma14133677.
Atomic force microscopy (AFM) was used to explore the effects of graphene modifier on the microstructure of asphalt. The morphologies of the before- and after-aged base asphalt and modified asphalt were performed and compared with analysis. The formation mechanism of asphaltic "bee structures" and the influence mechanism of graphene on asphalt were discussed from the classical theory of material science (phase transformation theory and diffusion theory). The results show that graphene facilitates the nucleation of "bee structures", resulting in an increasing number and decreasing volume of "bee structures" in modified asphalt. Additionally, the anti-aging performance of the modified asphalt improved significantly because of graphene incorporation.
采用原子力显微镜（AFM）研究了石墨烯改性剂对沥青微观结构的影响。对老化前后的基质沥青和改性沥青的形态进行了分析和比较。从材料科学的经典理论（相变理论和扩散理论）出发，探讨了沥青“蜂状结构”的形成机理以及石墨烯对沥青的影响机理。结果表明，石墨烯促进了“蜂状结构”的成核，导致改性沥青中“蜂状结构”数量增加、体积减小。此外，由于加入了石墨烯，改性沥青的抗老化性能显著提高。
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