| Polymorphism of natural fatty acid liquid crystalline phases. | |
| | |
MedLine Citation:
|
PMID: 22118375 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
|
We study the phase behaviour in water of a mixture of natural long chain fatty acids (FAM) in association with ethylenediamine (EDA) and report a rich polymorphism depending on the composition. At a fixed EDA/FAM molar ratio, we observe upon dilution a succession of organized phases going from a lamellar phase to a hexagonal phase and finally, to cylindrical micelles. The phase structure is established using polarizing microscopy, SAXS and SANS. Interestingly, in the lamellar phase domain, we observe the presence of defects upon dilution, which SAXS shows to correspond to intra-bilayer correlations. NMR and FFTEM techniques suggest that these defects are related to an increase in the spontaneous curvature of the molecules monolayers in the lamellae. ATR-FTIR spectroscopy was also used to investigate the degree of ionization within these assemblies. The successive morphological transitions are discussed with regards to possible molecular mechanisms, in which the interaction between the acid surfactant and the amine counterion plays the leading role. |
| | |
Authors:
|
Hélène Fay; Steven Meeker; Juliette Cayer-Barrioz; Denis Mazuyer; Isabelle Ly; Frédéric Nallet; Bernard Desbat; Jean-Paul Douliez; Virginie Ponsinet; Olivier Mondain-Monval |
Related Documents
:
|
18433345 - Metabolic activation of carboxylic acids. 22582945 - A computational study on a hs¯ sensing reaction utilizing a pyrylium derivative. 12499595 - Reaction of phosgene with the tricycle related to the minor base of phenylalanine trans... 19555185 - Dual effects of aliphatic carboxylic acids on cresolase and catecholase reactions of mu... 17879145 - Biochemistry and bioenergetics of glutaryl-coa dehydrogenase deficiency. 7327375 - Effects of various chemicals including bile acids and chemical carcinogens on the inhib... |
Publication Detail:
|
Type: JOURNAL ARTICLE Date: 2011-11-28 |
Journal Detail:
|
Title: Langmuir : the ACS journal of surfaces and colloids Volume: - ISSN: 1520-5827 ISO Abbreviation: - Publication Date: 2011 Nov |
Date Detail:
|
Created Date: 2011-11-28 Completed Date: - Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 9882736 Medline TA: Langmuir Country: - |
Other Details:
|
Languages: ENG Pagination: - Citation Subset: - |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
|
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Calcineurin subunit B up-regulates IFN-? production by phosphorylaiton of IRF3 via TLR4.
Next Document: Activation of the medial prefrontal cortex by escapable stress is necessary for protection against s...