| Titre : |
Structural and thermomechanical investigation of lyotropic liquid crystal phases doped with monodisperse microparticles |
| Type de document : |
texte imprimé |
| Auteurs : |
Alain Ponton, Auteur ; C. Meyer, Auteur ; G. Foyart, Auteur ; L. Aymard, Auteur ; K. Djellab, Auteur |
| Année de publication : |
2014 |
| Article en page(s) : |
7 p. |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Amidons
Calcaire
Cristaux liquides lyotropes
Dispersions et suspensions
Gommes et résines
Matériaux cimentaires
Particules (matières)
Stabilisants (chimie)
|
| Index. décimale : |
532.05 Mécanique des fluides et des liquides - Dynamique (cinétique et cinématique) |
| Résumé : |
We present a study of the structural and thermomechanical properties of lyotropic phase in the quasi ternary system made of Cetylpyridinium chloride (CPCI)/hexanol/salt water (0.9% by mass) with and without cobalt microparticles. Phase transition temperatures of the structural sequence isotropic L,/nematic calamitic Nc,/hexagonal H have been determined by differential scanning microcalorimetry. Temperature induced developable domains in hexagonal phase H and disclinations in calamitic nematic phase Nc, were observed in crossed polar optical microscopy in confined geometry. A rheological study of calamitic nematic phase NIc highlighted structuring effect of cobalt microparticles from a concentration of 2 % to be demon-strated by an increase in viscosity and viscoelastic moduli. This could be explained by a stabilization of disclinations. |
| Note de contenu : |
- STUDIED MATERIALS AND EXPERIMENTAL METHODS : Sample preparation - Quasi-ternary system - Experimental methods
- RESULTS : Differential scanning microscopy - Analysis of defective macroscopic textures by optical microscopy - Shear rheology |
| Référence de l'article : |
14147 |
| DOI : |
10.3933/ApplRheol-24-14147 |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=21557 |
in APPLIED RHEOLOGY > Vol. 24, N° 1 (2014) . - 7 p.
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Structural and thermomechanical investigation of lyotropic liquid crystal phases doped with monodisperse microparticles in APPLIED RHEOLOGY, Vol. 24, N° 1 (2014)
