热解炭黑与沥青相容性的分子动力学模拟
作者:
作者单位:

1.长沙理工大学 交通运输工程学院,湖南 长沙 410114;2.长沙理工大学 交通运输部道路结构与材料交通行业重点实验室(长沙),湖南 长沙 410114

作者简介:

邓覃浩(2000—),男,湖北宜昌人,长沙理工大学硕士生.E-mail:21201060170@stu.csust.edu.cn

通讯作者:

李闯民(1965—),男,湖南宁乡人,长沙理工大学教授,博士生导师,博士.E-mail:lichuangmin@csust.edu.cn

中图分类号:

U414

基金项目:

江西省交通运输厅科技项目(2023H0025);湖南省教育厅科学研究项目(22B0984)


Molecular Dynamics Simulation of Compatibility between Pyrolysis Carbon Black and Asphalt
Author:
Affiliation:

1.School of Traffic and Transportation Engineering, Changsha University of Science and Technology, Changsha 410114, China;2.Key Laboratory of Road Structure and Material of Ministry of Transport (Changsha), Changsha University of Science & Technology, Changsha, 410114, China

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    摘要:

    为了探索废轮胎热解炭黑(PCB)与沥青的相容特性,选取PCB外层灰分的主要组分SiO2和ZnO作为其代表,以含缺陷的石墨烯层(D-Graphene)作为炭黑表层,使用Materials Studio软件构建沥青与这些组分的界面模型.通过分子动力学研究发现:ZnO与沥青的黏附能密度最高,其次为D-Graphene,SiO2最低;D-Graphene/沥青界面的沥青分子活性极高,显示出最大的均方位移和扩散系数;ZnO对沥青各组分均表现出较强的吸附性,而SiO2与D-Graphene对沥青不同组分的吸附表现出选择性.基于模拟结果可推测,提高PCB与沥青黏附性的关键在于尽可能消除PCB中的酸性矿物灰分,并暴露其表层活性点.

    Abstract:

    To investigate the adhesive properties between pyrolysis carbon black (PCB) derived from waste tires and asphalt, select SiO2 and ZnO, the main components of the outer layer ash of PCB, as their representatives,defective graphene layers (D-Graphene) were employed as the top layer for the carbon black,using Materials Studio software, interface models between asphalt and these components were constructed. Molecular dynamics (MD) studies revealed:the adhesive energy density between ZnO and asphalt was the highest, followed by D-Graphene, with SiO2 showing the least adhesive energy;asphalt molecules at the D-Graphene interface demonstrated high activity, as evidenced by their substantial mean square displacement and diffusion coefficient values;ZnO exhibits strong adsorption properties for all components of asphalt, while SiO2 and D-Graphene exhibit selectivity in adsorbing different components of asphalt. Based on the simulation results, it can be inferred that, enhancing the adhesion between PCB and asphalt hinges on minimizing the presence of acidic mineral ash and unveiling the active sites on the PCB surface.

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邓覃浩,李闯民,艾毅,甘有为,伍漳麟.热解炭黑与沥青相容性的分子动力学模拟[J].建筑材料学报,2024,27(9):796-805

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  • 收稿日期:2023-11-10
  • 最后修改日期:2023-12-10
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  • 在线发布日期: 2024-10-11
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