四乙铵离子对阴离子表面活性剂及其混合体系的表面活性和胶团形成的影响

The Effect of Tetraethylammonium Ion on the Surface Activities and Micelle Formation of Anionic Surfactants and Their Mixtures

研究了溴化四乙铵介质中十二烷基硫酸四乙铵、全氟辛基磺酸四乙铵及其混合体系的表面化学性质。四乙铵离子在浓度较小时主要起电解质反离子作用，在浓度较大时则明显参与表面吸附和胶团的形成，其作用相当于在表面活性离子的疏水链上“引入”碳氢链，从而导致表面活性提高和碳氢／碳氟表面活性剂混合体系中碳氢／碳氟链间的互疏作用减弱等。

Results are presented of the effects of tetraethylammonium ion on the surface activities and micelle formation of anionic surfactants and their mixtures. Tetraethylammonium ion behaves as an inorganic ion when its concentration is low, but is obviously participates in the adsorption and micellization when its concentration gets higher. It seems that a hydrocarbon chain was introduced onto the hydrophobic chain of surfactants. As a result, the surfactants act higher surface acitivties and the mutual phobicity between the fluorocarbon and hydrocarbon surfactants is reduced.