Surface properties of Gemini surfactants with pyrrolidinium head groups

[Display omitted] ► Pyrrolidinium Gemini surfactants were synthesized and characterized. ► Gemini surfactants with heterocyclic head groups have superior surface activity compared to traditional analogues. ► The mechanism of micellization varies as a function of the chain length. Gemini surfactants...

Full description

Saved in:
Bibliographic Details
Published inJournal of colloid and interface science Vol. 370; no. 1; pp. 111 - 116
Main Authors Cai, Bo, Li, Xuefeng, Yang, Yi, Dong, Jinfeng
Format Journal Article
LanguageEnglish
Published Amsterdam Elsevier Inc 15.03.2012
Elsevier
Subjects
Online AccessGet full text

Cover

Loading…
More Information
Summary:[Display omitted] ► Pyrrolidinium Gemini surfactants were synthesized and characterized. ► Gemini surfactants with heterocyclic head groups have superior surface activity compared to traditional analogues. ► The mechanism of micellization varies as a function of the chain length. Gemini surfactants Cn-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 Cn-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 (ΔGm0,ΔHm0,TΔSm0) 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.
Bibliography:http://dx.doi.org/10.1016/j.jcis.2011.12.025
ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ObjectType-Article-1
ObjectType-Feature-2
ISSN:0021-9797
1095-7103
DOI:10.1016/j.jcis.2011.12.025