Surface properties of bolaamphiphiles in ethanol/water mixed solutions

被引：4
作者：
Feng, H [1 ]
Huang, HB [1 ]
Bin, Z [1 ]
Li, ZC [1 ]
机构：
[1] Peking Univ, Coll Chem & Mol Engn, State Key Lab Struct Chem Unstable & Stable Speci, Beijing 100871, Peoples R China
来源：
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 2004年 / 242卷 / 1-3期
基金：
中国国家自然科学基金;
关键词：
bolaamphiphile; surface tension; micellization; ethanol-water mixture;
D O I：
10.1016/j.colsurfa.2004.03.028
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The effect of ethanol on the surface properties of bolaamphiphiles and their mixed systems with oppositely charged conventional surfactants is studied and compared with the corresponding conventional surfactant systems. It is found that both the bolaamphiphile and the conventional surfactant have the similar variation tendency of gamma(cmc) and Gamma(infinity) in the single surfactant system. However, in the cationic and anionic mixed surfactants system the gamma(cmc) decreases with the ethanol addition in the bolaamphiphile systems. This tendency is reverse to that in conventional surfactant system. Surface activity of the asymmetric bolaamphiphiles SHMC decreases greatly when ethanol is added into the system due to the existence of the hydroxyl group in the SHMC molecule. Adding opposite charged surfactant may greatly increase surface activity in the SHMC/C12NEt3Br/ethanol systems. (C) 2004 Elsevier B.V. All rights reserved.
引用
收藏
页码：115 / 122
页数：8
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