基于表面力测量的煤尘润湿剂与煤相互作用研究
Study on interaction between coal dust wetting agent and coal based on surface force measurement
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摘要: 采用压电陶瓷双晶悬臂梁力学测量装置，测量表面活性剂溶液液滴与煤之间的相互作用力，表征液滴润湿煤块的难易程度,研究了表面活性剂溶液浓度和表面活性剂类型对相互作用力的影响。结果表明：在量浓度为5×10-5、8×10-5、1.5×10-4 mol/L的表面活性剂脂肪醇聚氧乙烯醚（9）（AEO9）溶液中，量浓度为1.5×10-4 mol/L的溶液液滴所受的最大斥力最小，到达最大斥力所用的时间最短，润湿能力最强；在量浓度均为1.5×10-4 mol/L的3种同源的脂肪醇聚氧乙烯醚试剂AEO7、AEO9、AEO12溶液中，AEO9溶液所受的最大斥力最小，且到达最大斥力所用时间最短，说明其润湿能力最强。Abstract: In this study, the interaction force between surfactant solution droplets and coal is measured by the mechanical testing device of piezoelectric ceramic double crystal cantilever beam, and the difficulty degree of the droplets wetting coal is characterized. The effects of the concentration of surfactant solution and the type of surfactant on the interaction force were studied. The results showed that in the solution of surfactant fatty alcohol polyoxyethylene ether（9） （AE09） with the concentration of 5×10-5 mol/L, 8×10-5 mol/L and 1.5×10-4mol/L, the solution with the concentration of 1.5×10-4 mol/L had the lowest maximum repulsive force and the shortest time to reach the maximum repulsive force, so its wetting ability was the strongest. In the solution of three homologous series of nonionic surfactants of polyoxyethylenated fatty alcs（AE07, AE09 and AE012） with the concentration of 1.5×10-4 mol/L, the maximum repulsive force of AE09 solution was the least, and the time to reach the maximum repulsive force was also the shortest, indicating that it had the strongest wetting ability.
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Keywords:
- coal dust /
- surfactant /
- surface force /
- wettability /
- dust suppressant
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