Advanced search
Start date
(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

On the coexistence of uniaxial nematic phases in the lyotropic mixture sodium dodecyl sulphate/1-decanol/D2O

Full text
Oliveira-Filho, A. G. [1] ; Akpinar, E. [2] ; Reis, D. [1] ; Figueiredo Neto, A. M. [1]
Total Authors: 4
[1] Univ Sao Paulo, Inst Fis, BR-05508090 Sao Paulo, SP - Brazil
[2] Abant Izzet Baysal Univ, Arts & Sci Fac, Dept Chem, Golkoy, Bolu - Turkey
Total Affiliations: 2
Document type: Journal article
Source: MOLECULAR CRYSTALS AND LIQUID CRYSTALS; v. 657, n. 1, p. 1-5, 2017.
Web of Science Citations: 0

Previously examined lyotropicmixtures sodium dodecyl sulphate (SDS) 1-decanol (DeOH) - D2O were prepared in four different molar ratios, M = {[}D2O]/{[}SDS], where M = 30, 31, 32 and 33, to study the coexistence of uniaxial discotic (N D) and calamitic (N C) nematic phases as was claimed in recent articles. Those mixtures were investigated in a specific temperature range by laser conoscopy, polarized optical microscopy (POM) and small-angle X-ray scattering (SAXS) to construct partial phase diagram. By combining the results obtained from all these techniques, we could not observe the N-D - N-C phase coexistence in the phase diagram of SDS/DeOH/D2O after the detailed investigation, as it was formerly reported. The results obtained in this study are in a good agreement with symmetry arguments and theoretical predictions but not with literature claims. The present results are also consistent with experimental investigations of other lyotropic mixtures whose phase diagrams were previously identified. (AU)

FAPESP's process: 11/13616-4 - Optical and structural properties of elastomers and complex fluids of biological interest
Grantee:Antonio Martins Figueiredo Neto
Support type: Research Projects - Thematic Grants
FAPESP's process: 14/50983-3 - INCT 2014: complex fluids
Grantee:Antonio Martins Figueiredo Neto
Support type: Research Projects - Thematic Grants