Abstract: A surface equation of state for nonionic surfactant aqueous solutions is developed by using perturbation theory and two - dimensional gaseous theory. A surface equation of state for ionic surfactant aqueous solutions is also developed by combining perturbation theory and pressure equation . The surface pressures of six polyoxyethylene n - alkanol - water systems, polyoxyethylene n - octylphenol - water system and sodium dodecyl sulphate - water system are accurately correlated . By using the adjustable parameters obtained, the surface pressures of other polyoxyethylene n - alkanol - water systems , polyoxyethylene n - octylphenol - water system and sodium dodecyl sulphate - water system at different temperatures are predicted. Both the correlated values and the predicted values are satisfactory.

摘要： 应用微扰理论并借鉴二维气体理论的处理方法,建立了非离子表面活性剂水溶液的表面状态方程。将微扰理论与压力方程相结合,建立了离子表面活性剂水溶液的表面状态方程。运用提出的状态方程,分别对6种烷基聚氧乙烯醚、辛基酚聚氧乙烯醚、十二烷基硫酸钠等表面活性剂水溶液的表面压数据进行了关联,并利用关联所得的参数预测了其他种类的烷基聚氧乙烯醚及辛基酚聚氧乙烯醚和十二烷基硫酸钠水溶液在不同温度下的表面压。关联和预测的精度均较高,结果令人满意。