Organogels and Aerogels of Racemic and Chiral 12-Hydroxyoctadecanoic Acid

P. Terech, V. Rodriguez, J. D. Barnes, G. B. McKenna

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Abstract

Gels were prepared by cooling dilute solutions of 12-hydroxyoctadecanoic acid (12-HOA), a fatty acid surfactant, in a variety of organic solvents. Both the racemic (dl) and chiral (d) forms of 12-HOA were used. Small angle neutron scattering, small angle X-ray scattering, and wide-angle X-ray scattering investigations demonstrated basic similarities between the chiral and the racemic gels. The gels are three-dimensional networks of fibers of rectangular cross-sectional shape with varying aspect ratio and thickness. The fiber network is strengthened by junction points where the molecules pack in a monoclinic crystalline form. “Head to head” contacts between the carboxylic acid groups and the formation of multiple hydrogen sequences are ubiquitous in these gels.

Original languageEnglish
Pages (from-to)3406-3418
Number of pages13
JournalLangmuir
Volume10
Issue number10
DOIs
StatePublished - Oct 1 1994

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