碳氟醇与阴离子表面活性剂的相互作用

Interaction Between 2,2,3,3,4,4,4-Heptafluorobutanol and Anionic Surfactants

测定了不同比例的C_(10)_H_(21)SO_4Na-C_3F_7CH_2OH、C_7F_(15)COONa-C_3H_7CH_2OH混合水溶液的表面张力,加入C_3F_7CH_2OH可增加阴离子表面活性剂的表面活性;在表面层中,C_3F_7CH_2OH与C_(10)H_(21)SO_4Na间分子相互作用比C_3F_7CH_2OH-C_7F_(15)COONa体系弱;这是由于CF链与CH链间“互疏”作用的结果;随着C_3F_7CH_2OH浓度增加,对C_(10)H_(21)SO_4Na胶团反离子结合度也随之增加。

The mixed aqueous solution of C3F7CH2OH-C10 H21 SO4Na and C3F7CH2OH-C7H15 COONa was investigated by the surface tension analysis. When C3F7CH2OH is added into the anionic surfactants the surface activity of anionic surfactant is increased. In the surface layer the molecular interaction in the C3F7CH2OH-C10 H21 SO4Na system is weaker (with smaller |βσ | value) than that in the C3F7CH2OH-C7F15COONa system; The counterion binding degree of C10H21SO4Na micelles increases with the concentration increase of C3F7CH2OH.