To reduce the production of dust in the coal mine production process, the surface tension and contact angle of the solution at different temperatures were measured, and the temperature range of the surfactant to achieve the best wetting effect during the coal seam water injection was determined. The results show that the surface tension and contact angle of sodium dodecyl sulfate (SDS) and sodium dodecylbenzenesulfonate (SDBS) and of SDS and polysorbate 80 (Tween80) decrease rapidly at first and then increase slowly with the increase of temperature, the minimum surface tension values were 26.293 and 27.726 mN/m, and the minimum values of contact angles were 89.35 and 65.1°, respectively. The two kinds of composite solutions have the best wetting effect at 35–40 °C. In addition, the influence of surfactants on the chemical structure of coal under different temperature conditions was analyzed, and the variation rule between the chemical structure and the wetting property of coal was explored. The research results have important practical guiding significance for reducing dust generation in a coal mine.

中文翻译：

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表面活性剂溶液对不同温度下煤润湿和化学结构特性的影响研究


为减少煤矿生产过程中粉尘的产生，测量了不同温度下溶液的表面张力和接触角，确定了在煤层注水过程中达到最佳润湿效果的表面活性剂的温度范围。结果表明，十二烷基硫酸钠（SDS）和十二烷基苯磺酸钠（SDBS）以及SDS和聚山梨酯80（Tween80）的表面张力和接触角随温度的升高呈先快速下降后缓慢增加的趋势，最小表面张力值分别为26.293和27.726 mN/m，接触角最小值分别为89.35和65.1°。 分别。两种复合溶液在 35–40 °C 时润湿效果最好。 此外，分析了不同温度条件下表面活性剂对煤化学结构的影响，探讨了煤的化学结构与润湿性之间的变化规律。研究结果对减少煤矿粉尘产生具有重要的现实指导意义。