School of Mining Engineering, Taiyuan University of Technology, Taiyuan 030024, China.
School of Engineering, The University of Western Australia, Perth, WA 6009, Australia.
Molecules. 2022 Aug 20;27(16):5314. doi: 10.3390/molecules27165314.
Ionic surfactants are widely used in coal dust control in mines, and their adsorption characteristics on the coal surface have a great influence on the coal dust control effect. In this investigation, anionic sodium dodecylbenzenesulfonate (SDBS) and cationic octadecyltrimethylammonium chloride (STAC) were selected to explore the adsorption characteristics of ionic surfactants on the surface of anthracite. The experimental results show that the adsorption rate and efficiency of STAC on the surface of anthracite are higher than that of SDBS; STAC can form a denser surfactant layer on the surface of anthracite, with a larger adsorption capacity and higher strength. Molecular dynamics simulations show that the adsorption between STAC and the surface of anthracite is tighter, and the distribution at the coal-water interface is more uniform; the surface of anthracite modified by STAC has a stronger binding ability to water molecules.
离子型表面活性剂在煤矿防尘中被广泛应用，其在煤表面的吸附特性对防尘效果有很大影响。本研究选用阴离子型十二烷基苯磺酸钠（SDBS）和阳离子型十八烷基三甲基氯化铵（STAC），探索了离子型表面活性剂在无烟煤表面的吸附特性。实验结果表明，STAC 在无烟煤表面的吸附速率和效率均高于 SDBS；STAC 可以在无烟煤表面形成更致密的表面活性剂层，具有更大的吸附容量和更高的强度。分子动力学模拟表明，STAC 与无烟煤表面的吸附更紧密，在煤-水界面的分布更均匀；经 STAC 改性后的无烟煤表面对水分子具有更强的结合能力。
