Abstract
Taking advantage of the state-of-the-art graphene preparation technologies in China and abroad, this work studied the preparation processes of graphene for road applications based on the preliminary high-speed vibration ball milling method. This work combined numerical modeling and microscopic experiments. The preparation parameters were optimized through a multifactor and multilevel test scheme. The materials, influencing factors, and parameters in the preparation process were systematically studied. A graphene preparation method was proposed that considered vibration frequency, static filling rate, material-to-ball volume ratio, and the void percentages of media. Flake graphite, aluminum powder, and 304 stainless-steel grit were used as the preparation materials. The preparation parameters and process model were established based on the uniform design method. The preparation parameters were proposed, calculated, and optimized. Microscopic analysis showed that the proposed preparation method can improve the quality of graphene. This study provides a new source of raw materials for the application of graphene in road engineering.
Highlights
Graphene has attracted widespread attention from researchers in China and abroad since the discovery of fullerene, a quasizero-dimensional material, in the 1980s
Geim and Kanstantin Novoselov) successfully isolated graphene, a two-dimensional carbon nanomaterial composed of single-layer carbon atoms, by peeling pyrolytic graphite sheet with adhesive tape [1,2,3]
According to a patented graphene preparation technology, this study aimed to develop graphene with good quality and low cost based on mechanical exfoliation and ball milling
Summary
Graphene has attracted widespread attention from researchers in China and abroad since the discovery of fullerene, a quasizero-dimensional material, in the 1980s. Graphene has high transmittance (97.7%) [5], high Young’s modulus (1 TPa) [6, 7], high specific surface area (2630 m2/g) [8], high thermal conductivity (5000 W/m·K), and high carrier mobility (2:5 × 105 cm2/ðV · sÞ) [9] It has received widespread attention in the fields of biology, medicine, environmental science, electronics, energy, and materials science because of its unique physical structure and excellent electrical, optical, thermal, and mechanical properties [10]. CVD-prepared graphene sheets have a large area, good uniformity, high quality, and controllable number of layers. They are suitable for high-end fields such as optics, electronics, sensors, energy, and biology. This work provides a new source of raw materials for the application of graphene in road engineering and provides a reference for the development of graphene composite road materials [20,21,22,23,24,25,26,27]
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