摘要
阴、阳离子表面活性剂混合体系，在一定浓度及混合比范围内，可以形成两个互不相溶、平衡共存的水相，称为表面活性剂双水相．其中阳离子表面活性剂过量的双水相体系，称为阳离子双水相．本文分别以芘和罗丹明B作为探针，用荧光探针法研究了摩尔比为1：6：1的C_12NE和SDS混合体系所形成的阳离子双水相，测定其上层和下层的胶束微环境的极性和微粘度，取得了有意义的结果．
We rePOrt here that two aqueous phases were formed when catlonlc surfactant dodecyltriethylammonlum bromide( C;。 NE) was mixed with anlonlC SurfaCtant sodium dodeCylsulfate(SDS)by ratio off.6:1(Vv).This phen。ena had been called as aqu。us surfactant two phases(ASZP). If catlonlc surfactant was In excess In the mixture, It was called catlonlc aqu。us twophases(CAZP).Pyrene fluorescence probe has been used for studying the mlcelle properties ofCAZP, and evaluating the micelle mlcroPOlarityofCAZP. The mlcrovlscoslty of mP was evaluated by determining the degree of fluorescencepohazatlon of rhodamlne B In CAZP. In the聊er加, the molar ratio of catlonlc- anlonlcsujactants was nearl:1.The molecule arrangement of the mlcelle was compact and regular, andmlcrovlscoslty was high due to the electrostatlc and hydrophoblc Interactions. Whereas In thelower phase, the molar ratio of catlonlc- anlonlc surfactants deviated significantly froml二 1. Theonganlzatlon of the space arrayment of mlcelle was less compact than that of the upper phase,andits mlcrovlscoslty was low.
出处
《化学学报》
SCIE
CAS
CSCD
北大核心
1996年第5期491-496,共6页
Acta Chimica Sinica
基金
国家自然科学基金资助课题
