十六烷基甲苯磺酸钠的界面性能研究

用自制的3种十六烷基甲苯磺酸钠，研究了其正构烷烃/水体系的界面性能。分别考察了磺酸盐支化程度及浓度等内部因素以及外加助剂脂肪醇类型和无机盐浓度等外界因素对磺酸盐最小烷烃碳数n_min以及界面张力值的影响。结果表明，磺酸盐支化程度增加，其n_min变大，最低界面张力值变小；而随着磺酸盐浓度的增加，界面张力值先下降后上升；随着助剂脂肪醇碳链长度的增加，其n_min逐渐变大；无机盐的影响则表现为随着盐浓度的增加界面张力值先下降后上升，超低界面张力值出现在一个适宜的盐浓度范围内。

Research of the Interfacial Properties of Hexadecane Toluene Sulfonate

In this paper, using three kinds of hexadecane toluene sulfonate synthesized in the laboratory, respectively discussed how the internal factors sucn as branched degree and concentration of the sulfonates and the external factors like the different kinds of fatty alcohol and the concentration of inorganic salt effects on either the minimum alkane carbon number or the interfacial tensions. The results showed that as the branched-degree increased , the minimum number of alkane carbon -nmin increased while the minimum value of interfacial tension decreased. As the concentration increased the value of interfacial tension firstly decreased then increased.The minimum alkane carbon number became bigger as the carbon chain length of the fatty alcohol increased. The inorganic salt influence displayed that the salt concentration increased, the value of interfacial tension rose after the first drop, ultra-low interfacial tension appeared in a suitable salinity scope .