湖南大学学报（自然科学版）2024，Vol.51Issue(3)：51-58,8.DOI:10.16339/j.cnki.hdxbzkb.2024027
离子乳化剂对乳化沥青稳定性影响的分子模拟
Molecular Simulation on Effect of Ionic Emulsifiers on Stability of Emulsified Asphalt
摘要
Abstract
To investigate the different effects of different ionic emulsifiers on the stability of emulsified asphalt,based on molecular dynamics simulation,the double-layer model structure of"asphalt-emulsifier-water-emulsifier-asphalt"was constructed by using Materials Studio software,and emulsified asphalt systems containing different ionic emulsifier molecules were simulated to compare the effect of anionic(SDS)/cationic(CTAC)emulsifiers on the stability of emulsified asphalt.The changes in the relative concentration distribution,interfacial film thickness,interfacial formation energy,and electrostatic potential(ESP)of the asphalt emulsions were compared with the addition of different emulsifier molecules in order to analyze the stability of the emulsified asphalt.The results show that the SDS emulsifier increases the thickness of the interfacial layer between asphalt and water,reduces the interfacial tension between the two phases,and improves the stability of the emulsified asphalt,compared with the CTAC emulsifier.From the perspective of electrostatic potential analysis,compared with CTAC emulsifier,SDS emulsifier molecule has a larger maximum electrostatic potential of the alkane chain,and it is more likely to bond with atoms with negative electrostatic potential.Therefore,the overall stability of emulsified asphalt with an SDS emulsifier is better than that of emulsified asphalt with a CTAC emulsifier.关键词
乳化沥青/乳化剂/分子模拟/稳定性/静电势Key words
emulsified asphalt/emulsifier/molecular simulation/stability/electrostatic potential分类
交通工程引用本文复制引用
袁燕,陈宏宇,王叶飞,徐松,薛斌..离子乳化剂对乳化沥青稳定性影响的分子模拟[J].湖南大学学报（自然科学版）,2024,51(3):51-58,8.基金项目
国家自然科学基金资助项目(52278446),National Natural Science Foundation of China(52278446) （52278446）
