氟碳表面活性剂能够改变煤体结构和提高润湿特性，在煤尘防治方面具有重要作用。研发了基于氟碳表面活性剂（FS-31）增效的复合抑尘剂，分析了其表面张力和煤体接触角特征；基于红外光谱（FTIR）测试和Peakfit分峰拟合，定量研究了煤体疏水性和亲水性官能团变化；结合马尔文粒径实验和扫描电镜测试，分析了煤体颗粒团聚行为及特征粒径变化；结果表明：二元表面活性剂复配溶液的表面张力在30 mN/m左右，部分溶液的煤粉完全沉降时间最长可达12 h；氟碳表面活性剂增效作用下，煤体接触角变小，润湿性能变好，质量分数为0.1%的FS-31溶液和质量分数为0.05%的烷基糖苷（APG）、槐糖脂组合溶液的表面张力低至18.04 mN/m，且煤粉沉降时间最低降至74 s；氟碳表面活性剂的加入使得亲水官能团增加，质量分数为0.3%的脂肪酸甲酯磺酸钠（MES）、APG和质量分数为0.1%的FS-31溶液处理煤样的亲水官能团比MES和APG二元复配溶液处理煤样和原煤的分别增加2.69%、1.37%，在同等破碎作用下产生的大煤体颗粒较多，特征粒径更大，呼吸性粉尘占比最大降低53.74%。

Fluorocarbon surfactants could change coal structure and improve wettability characteristics, thus, it plays a significant role in coal dust prevention and control. Composite dust suppressant based on fluorocarbon surfactant (FS-31) enhancement was developed, and the surface tension and contact angle characteristics were analyzed. Based on the infrared spectrum (FTIR) test and peak fitting, the changes of hydrophobic and hydrophilic functional groups of coal were quantitatively analyzed. Meanwhile, particle agglomeration behavior and characteristic particle size were studied by combining Malvin particle size experiment and scanning electron microscope test. Results show that the surface tension of binary surfactant compound solution is approximately 30 mN/m. The settling time of some solutions could be as long as 12 hours. Under the enhancement effect of fluorocarbon surfactant, the contact angle of coal becomes smaller and the wettability becomes better. The surface tension of 0.1% FS-31 solution and 0.05% APG, 0.05% sophoricoside solution is as low as 18.04 mN/m, and the settling time of pulverized coal is as low as 74 seconds. With the addition of fluorocarbon surfactant, the hydrophilic functional groups increase. The hydrophilic functional groups of coal treated by 0.3% MES, 0.3% APG and 0.1% FS-31 combined solution is 2.69% and 1.37% more than those of coal treated by MES and APG combined solution and raw coal, respectively. In the same crushing conditions, there are more large coal particles and larger characteristic particle size. The proportion of respirable dust decreases by 53.74%. Therefore, the addition of fluorocarbon surfactant is realistically meaningful to improve prevention and control effect of coal dust.