Effect of dicationic ionic liquids on lyotropic liquid crystals formed by a binary system composed of Triton-X 100 and water. (2nd November 2017)

• Record Type: Journal Article
• Authors: Thieghi, Leila T.; Longo, Luiz S.; Licence, Peter; Alves, Sarah
• Is Part Of: Molecular crystals and liquid crystals. Volume 657(2017)
• Page Start: 95
• Page End: 101
• Publication Date: 2017-11-02
• Subjects: Binary system Triton-X -- dicationic ionic liquids -- lamellar mesophase -- lyotropic liquid crystal; Molecular crystals -- Periodicals; Liquid crystals -- Periodicals; Liquid crystals; Molecular crystals; Periodicals; 548
• DOI: 10.1080/15421406.2017.1403241
• Languages: English
• ISSNs: 1542-1406

Abstract

ABSTRACT: In this work, binary mixtures of a non-ionic surfactant (Triton X-100) and water were studied with concentrations of 30%wt H2 O, showing, lamellar mesophase at temperatures below 10 o C. Different dicationic ionic liquids were used for doping these mesophases: 1, n-bis(3-methylimidazolium-1-yl)alkane, 1, n-bis(1-methylpyrrolidinium-1-yl)alkane and 1, n-bis(pyridinium-N-yl)alkane dibromide, where n = 6 and 8. Polarized Optical Microscopy and Small-Angle X-ray Scattering were used for identifying the mesophases and the influence of different dicationic ionic liquids on the lyotropic liquid crystals phase transitions. The addition of dicationic ionic liquids to the lyotropic liquid crystals samples led to changes in transition temperature and in mesophase structure itself (such as characteristic distances).