Swelling of ionic and nonionic surfactant micelles by high pressure gases

John M. O'Callaghan; Hugh McNamara; Mark P. Copley; John P. Hanrahan; Michael A. Morris; David C. Steytler; Richard K. Heenan; Justin D. Holmes

doi:10.1021/la904464k

Swelling of ionic and nonionic surfactant micelles by high pressure gases

John M. O'Callaghan
, Hugh McNamara
, Mark P. Copley
, John P. Hanrahan
, Michael A. Morris
, David C. Steytler
, Richard K. Heenan
, Justin D. Holmes

School of Chemistry

Research output: Contribution to journal › Article › peer-review

Abstract

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 CTAB micelles.

Original language	English
Pages (from-to)	7725-7731
Number of pages	7
Journal	Langmuir
Volume	26
Issue number	11
DOIs	https://doi.org/10.1021/la904464k
Publication status	Published - 1 Jun 2010

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10.1021/la904464k

https://hdl.handle.net/10468/6648Licence: CC BY-NC-ND

Cite this

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title = "Swelling of ionic and nonionic surfactant micelles by high pressure gases",

abstract = "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 CTAB micelles.",

author = "O'Callaghan, \{John M.\} and Hugh McNamara and Copley, \{Mark P.\} and Hanrahan, \{John P.\} and Morris, \{Michael A.\} and Steytler, \{David C.\} and Heenan, \{Richard K.\} and Holmes, \{Justin D.\}",

year = "2010",

month = jun,

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doi = "10.1021/la904464k",

language = "English",

volume = "26",

pages = "7725--7731",

journal = "Langmuir",

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publisher = "American Chemical Society",

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TY - JOUR

T1 - Swelling of ionic and nonionic surfactant micelles by high pressure gases

AU - O'Callaghan, John M.

AU - McNamara, Hugh

AU - Copley, Mark P.

AU - Hanrahan, John P.

AU - Morris, Michael A.

AU - Steytler, David C.

AU - Heenan, Richard K.

AU - Holmes, Justin D.

PY - 2010/6/1

Y1 - 2010/6/1

N2 - 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 CTAB micelles.

AB - 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 CTAB micelles.

UR - https://www.scopus.com/pages/publications/77952852933

U2 - 10.1021/la904464k

DO - 10.1021/la904464k

M3 - Article

C2 - 20148596

AN - SCOPUS:77952852933

SN - 0743-7463

VL - 26

SP - 7725

EP - 7731

JO - Langmuir

JF - Langmuir

IS - 11

ER -

Swelling of ionic and nonionic surfactant micelles by high pressure gases

Abstract

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