Effect of the surfactant head-group size dependence of the dye-surfactant interactions on the lyotropic uniaxial to biaxial nematic phase transitions
Yükleniyor...
Dosyalar
Tarih
2021
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Elsevier
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
In the present study, the interactions of the anionic azo dye Sunset Yellow with dodecylalkylammonium bromide (DAABr) surfactants in lyotropic mixtures have been investigated for the stabilization of the different lyotropic nematic phases. Sunset Yellow doped mixtures of DAABr surfactants, with different head-group size, were studied by polarizing optical microscopy, laser conoscopy, and small-angle X-ray scattering. It was found that the extent of the interaction of Sunset Yellow with DAABr surfactant head groups on micelle surfaces affects the stabilization of different nematic phases, by causing the change in the micellar structural parameters. The results also indicated that the micelle surface curvature should be different in the three nematic phases. (C) 2021 Elsevier B.V. All rights reserved.
Açıklama
Turkey, the Scientific and Technological Research Council of Turkey (TUBITAK)(Turkiye Bilimsel ve Teknolojik Arastirma Kurumu (TUBITAK)); Turkey, Bolu Abant Izzet Baysal University Directorate of Research Projects Commission (BAP); Brazil, National Council for Scientific and Technological Development; Brazil, National Institute of Science and Technology Complex Fluids; Brazil, Sao Paulo Research Foundation
Anahtar Kelimeler
Lyotropic Uniaxial and Biaxial Nematic Phases, Anionic Azo Dye Sunset Yellow, Surfactant-Dye Interaction, Critical Micelle Concentration, Liquid-Crystal, Dodecyltrimethylammonium Bromide
Kaynak
Journal of Molecular Liquids
WoS Q Değeri
Q1
Scopus Q Değeri
Q1
Cilt
332
Sayı
Künye
Akpinar, E., Uygur, N., Ordu, O. D., Reis, D., & Neto, A. M. F. (2021). Effect of the surfactant head-group size dependence of the dye-surfactant interactions on the lyotropic uniaxial to biaxial nematic phase transitions. Journal of Molecular Liquids, 332, 115842.
