| Autor: |
Ponton A., Meyer C., Foyart G., Aymard L., Djellab K. |
| Jazyk: |
angličtina |
| Rok vydání: |
2014 |
| Předmět: |
|
| Zdroj: |
Applied Rheology, Vol 24, Iss 1, Pp 19-25 (2014) |
| Druh dokumentu: |
article |
| ISSN: |
1617-8106 |
| DOI: |
10.3933/applrheol-24-14147 |
| Popis: |
We present a study of the structural and thermomechanical properties of lyotropic phase in the quasi ternary system made of Cetylpyridinium chloride (CPCl)/hexanol/salt water (0.9 % by mass) with and without cobalt microparticles. Phase transition temperatures of the structural sequence isotropic L 1/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 Nc highlighted structuring effect of cobalt microparticles from a concentration of 2 % to be demonstrated by an increase in viscosity and viscoelastic moduli. This could be explained by a stabilization of disclinations. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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