期刊
JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 370, 期 -, 页码 111-116出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2011.12.025
关键词
Gemini surfactant; Heterocyclic head group; Pyrrolidinium; Micellization; Thermodynamics
资金
- National Natural Science Foundation of China [NSFC 20973129, 20803053]
Gemini surfactants C-n-4-nPB (where n represents the alkyl chain length of 10, 12, 14 and 16) were synthesized and characterized. Their surface activity, thermodynamic properties, and aggregation behavior were investigated by means of surface tension, electrical conductivity, and steady-state fluorescence. It was found that the Gemini surfactants C-n-4-nPB have superior surface activity to their corresponding monomer surfactants CnMPB as expected. Additionally, these compounds have lower cmc and surface tension in comparison with conventional cationic Gemini surfactants m-4-m. Thermodynamic parameters (Delta G(m)(0), Delta H-m(0), T Delta S-m(0),) show that the micellization is an entropy driven process with shorter hydrophobic chain lengths but instead is enthalpy driven for longer hydrophobic chain lengths. The effect of the hydrophobic alkyl chain length and the addition of inorganic salt NaBr on the surface activity and micellization are in line with the conventional cationic Gemini surfactants. (C) 2011 Elsevier Inc. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据