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12-Hydroxystearic Acid Lipid Tubes Under Various Experimental Conditions

12-Hydroxystearic Acid Lipid Tubes Under Various Experimental Conditions

Anne-Laure Fameau, Bérénice Houinsou-Houssou, Bruno Novales, Laurence Navailles, Frédéric Nallet, Jean-Paul Douliez

J Colloid Interface Sci. 2010 Jan 1;341(1):38-47.

PMID: 19846108

Abstract:

There is a growing interest for constructing supramolecular hollow tubes from amphiphilic molecules. Aqueous solutions of the ethanolamine salt of 12-hydroxystearic acid are known to form tubes of several tens of micrometers in length with a temperature-tunable diameter. However, the phase behavior of this system has not been fully studied. Herein, we report the variation of various physico-chemical parameters on the self-assembling properties of this system. The effects of the ionic strength, ethanol, doping with other lipids, pH, concentration, and the fatty acid/ethanolamine molar ratio R were investigated by both phase-contrast microscopy and DSC. We observed the formation of tubes in a wide range of parameters. For instance, the molar ratio R can be modified from 2/3 to 5/2 without altering the formation of tubes. In some but not all cases, the tube diameter still varied with temperature. These findings show that tubes form under various experimental conditions. This should increase the interest in producing such self-assemblies from low-cost fatty acids.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP106149-A	12-Hydroxystearic acid		106-14-9	Price

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