Swelling of Ionic and Nonionic Surfactant Micelles by High Pressure Gases

被引：6
|
作者：
O'Callaghan, John M. [1 ,2 ,3 ,5 ]
McNamara, Hugh [4 ]
Copley, Mark P. [1 ,2 ,3 ,5 ]
Hanrahan, John P. [1 ,2 ,3 ,5 ]
Morris, Michael A. [1 ,2 ,3 ,5 ]
Steytler, David C. [6 ]
Heenan, Richard K. [7 ]
Holmes, Justin D. [1 ,2 ,3 ,5 ]
机构：
[1] Natl Univ Ireland Univ Coll Cork, Mat & Supercrit Fluids Grp, Cork, Ireland
[2] Natl Univ Ireland Univ Coll Cork, Dept Chem, Cork, Ireland
[3] Natl Univ Ireland Univ Coll Cork, Tyndall Natl Inst, Cork, Ireland
[4] Natl Univ Ireland Univ Coll Cork, Dept Appl Math, Cork, Ireland
[5] Trinity Coll Dublin, CRANN, Dublin, Ireland
[6] Univ E Anglia, Sch Chem Sci & Pharm, Norwich NR4 7TJ, Norfolk, England
[7] Rutherford Appleton Lab, ISIS CLRC, Chilton OX11 0QX, Oxon, England
来源：
LANGMUIR | 2010年 / 26卷 / 11期
关键词：
ANGLE NEUTRON-SCATTERING; AOT REVERSE MICELLES; AQUEOUS-SOLUTIONS; BLOCK-COPOLYMER; CARBON-DIOXIDE; AGGREGATION BEHAVIOR; SOLUBILIZATION; PPO; TEMPERATURE; SILICA;
D O I：
10.1021/la904464k
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The influence of different solvent environments on the size, shape, and characteristics of surfactant micelles of Pluronic F127 and CTAB was investigated by small-angle neutron scattering (SANS). SANS experiments were undertaken on dilute micellar surfactant solutions of F127 and CTAB that between them were exposed to liquid and supercritical carbon dioxide, liquid propane, ethane, and heptane under various pressures and temperatures. Swelling of the surfactant micelles could be directly related to the solubility of the solvents within the micelles, especially within their cores. Carbon dioxide produced the largest swelling of the Pluronic F127 micelles, compared to propane and ethane, which mirrors the solubility of the gases in the PPO core of the micelles. Conversely, the extent of swelling of the cores of CTAB micelles was greater with propane compared to carbon dioxide, which again relates to the solubility of the solvents in the alkane core of the CIA B micelles.
引用
收藏
页码：7725 / 7731
页数：7
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