氟表面活性剂的铺展性能研究

研究环保型 AFFF 的核心成分四碳链表面活性剂(FC-4)溶液在环己烷、正庚烷、航空煤油、溶剂油、0#柴油上的一维铺展性能。用一定量 FC-4 表面活性剂与 1-己烷磺酸钠以物质的量比 1∶1 复配，根据该复配体系的 CMC 值配制浓度为 20 mmol/L 的 FC-4 溶液。得到 25 ℃时液膜铺展长度和时间的关 系，并利用幂指数函数 L=mtn 对实验数据进行拟合，得出表面活性剂溶液在不同油面的铺展长度与时间之间的关系式。经计算，实验值与理论计算值的均方根偏差（RMSD）小于 1.43，表明实验值与理论值吻合较好，可以用幂指数函数预测表面活性剂溶液液膜在燃油上的铺展过程。

Study on the spreading behavior of fluorine surfactant

As the core components of environmental AFFF, one dimensional spreading performance of four carbon chain surfactant (FC- 4) solutions on cyclohexane, n- heptane, aviation kerosene, solvent oil and 0# diesel were studied. A certain amount of FC- 4 surfactant and 1- hexanesulfonic acid sodium were mixed in the ratio of 1∶1, and the FC-4 solution with concentration of 20 mmol/L was prepared according to CMC value of the compound system. The relationship between spreading length and time of liquid film at 25 ℃ was obtained and was fitted by power exponential function of L=mtn . The relationship between spreading length and spreading time of surfactant solution on different oil surface was obtained. By calculating, the root mean square deviation (RMSD) between experimental values and theoretical values are less than 1.43, which shows a good agreement with experimental values and theoretical values. The power exponent function can be used to predict the spreading process of surfactant solution on fuel oil.