Micellar Solution Properties of Fluorocarbon−Hydrocarbon Hybrid Surfactants
Micellar Solution Properties of Fluorocarbon−Hydrocarbon Hybrid Surfactants
复制标题
氟碳烃杂化表面活性剂的胶束溶液性质
作者：
A. Ito;H. Sakai;Y. Kondo;ठand Norio Yoshino;M. Abe
用克拉夫特点、表面张力、正辛烷/水和水/全氟-正己烷界面张力和胶束聚集数测定了分子中含有碳链和烃链的杂化表面活性剂1-氧-1-[（4-氟烷基）苯基]-2-烷磺酸钠的溶液性质。分子在空气/水和辛烷/水界面所占的克拉夫特点（kraft point）以及胶束聚集数随着碳氟化合物和/或烃链长的增加而增加，而临界胶束浓度（cmc）、表面张力以及cmc处的辛烷/水界面张力随着碳氟化合物和/或烃链长的增加而降低。这些表面活性剂同时表现出较低的表面张力和碳氢化合物/水和氟碳化合物/水的界面张力，使表面活性剂水溶液浮在碳氢化合物（如苯）上成为可能。
Solution properties of sodium 1-oxo-1-[(4-fluoroalkyl)phenyl]-2-alkanesulfonates, hybrid surfactants containing a fluorocarbon chain and a hydrocarbon chain in the molecule, have been measured in terms of Krafft point, surface tension, n-octane/water and water/perfluoro-n-hexane interfacial tension, and aggregation number of micelles. The Krafft point, the area occupied by a molecule at the air/water and octane/water interfaces, and the aggregation number of micelles increase with an increase of fluorocarbon and/or hydrocarbon chain length, while critical micelle concentration (cmc), surface tension, and octane/water interfacial tension at the cmc decrease with an increase of fluorocarbon and/or hydrocarbon chain length. These surfactants are found to exhibit lower surface tension and hydrocarbon/water and fluorocarbon/water interfacial tension at the same time and make it possible to float a surfactant aqueous solution on a hydrocarbon substance such as benzene.