润湿性是煤尘抑尘剂的重要属性，直接影响抑尘剂对煤尘的降尘效果。选取了脂肪醇聚氧乙烯醚（AEO-9）、十二烷基硫酸钠（SDS）、TWEEN85、油酸钠（SODIUM OLEATE）4种表面活性剂和宁夏本地2种不同的煤尘作为研究对象，采用红外光谱、XPS分析、zeta电位、沉降实验、动态接触角测试等经典测试方法，研究了煤表面官能团以及表面电荷变化对润湿性的影响；并采用紫外分光光度法和低温氮气吸附法探索了煤的孔隙结构和吸附量对润湿性的影响。结果显示：非离子表面活性剂AEO-9和阴离子表面活性剂SDS对2种煤尘的润湿煤效果最佳，主要由于2种表面活性剂与煤尘表面的不同官能团均吸附稳定，且在同一质量分数下吸附速率快、吸附量大。

Wettability is an important attribute of coal dust suppressant, which directly affects the effect of dust suppressant on coal dust. Four surfactants, AEO-9, SDS, Tween 85, and sodium oleate, and two kinds of local coal dust in Ningxia were selected as the research objects, infrared spectroscopy, XPS analysis, zeta potential, sedimentation experiment, dynamic contact angle test and other classic testing methods were used to study the influence of coal surface functional groups and surface charge changes on wettability. In addition, the effect of coal pore structure and adsorption amount on wettability was explored by UV spectrophotometry and low-temperature nitrogen adsorption method. The results showed that the nonionic surfactant fatty AEO-9 and the anionic surfactant SDS had the best wetting effect on the two kinds of coal dust, the main reason is that the two surfactants are adsorbed stably with different functional groups on the surface of coal dust, and the adsorption rate is fast and the adsorption capacity is large at the same concentration.