Study on the Adhesion Characteristics of Silane Coupling Agent Modified Basalt Fiber to Asphalt Based on Molecular Dynamics

被引：0
|
作者：
Yang C. [1 ]
Liu L. [1 ]
Liu Z. [1 ]
Huang Y. [1 ]
Liu L. [1 ]
机构：
[1] School of Traffic & Transportation Engineering, Changsha University of Science & Technology, Changsha
来源：
Cailiao Daobao/Materials Reports | 2024年 / 38卷 / 06期
基金：
中国国家自然科学基金;
关键词：
adhesion property; basalt fiber; chemical grafting; molecular dynamics; silane coupling agent KH550;
D O I：
10.11896/cldb.22110027
中图分类号：
学科分类号：
摘要：
To enhance the interfacial adhesion property of basalt fiber to asphalt,the basalt fiber surface was modified using the grafted silane coupling agent KH550. The microscopic characterization of KH550 graft-modified basalt fiber was carried out by scanning electron microscopy and infrared spectroscopy,and the interfacial model of asphalt and BFKH550 was established based on the molecular dynamics method using the ‘chemical grafting’and ‘superposition’approaches. The results show that after KH550 graft modification,the surface of basalt fiber has more bumps and roughness,which increases the adhesion strength between basalt fiber and asphalt. The higher the number of KH550 grafted on the basalt fiber surface,the better the adhesion to the asphalt. The interfacial energy of 20 KH550 grafted on the basalt fiber surface at 25 ℃ increased by 26. 1% compared to non-grafted KH550. After KH550 graft modification,the diffusion coefficients of the four components of the asphalt follow the same pattern as without KH550 grafting,being saturated saturate > aromatic > resin > asphaltene,but their overall diffusion coefficients are smaller than without KH550 grafting,indicating that stronger adsorption of KH550 graft-modified basalt fiber to the asphalt has occurred,thus effectively improving the adhesion properties of basalt fiber to the asphalt. The results of the study can provide an important reference for the promotion of basalt fiber in asphalt mixture. © 2024 Cailiao Daobaoshe/ Materials Review. All rights reserved.
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