Amphitropic liquid crystals: Two lamellar phases in a surfactant containing thermotropic and lyotropic mesogenic groups

S. Fuller, J. Hopwood, A. Rahman, N. Shinde, G. J. Tiddy, G. S. Attard, O. Howell, S. Sproston

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

We have studied the lyotropic liquid-crystalline behaviour of cationic surfactants containing a potentially thermotropic moiety, a terminal cyanobiphenyloxy group. Both mono-alkyl and mid-chain substituted dialkyl surfactants have been examined using optical microscopy and NMR spectroscopy. Incorporation of the cyanobiphenyloxy group destabilizes the hexagonal and bicontinuous cubic phases, with only an extensive lamellar region being observed. For the dialkyl surfactant there is a range of compositions where two lamellar phases co-exist, one water-rich and the second surfactant-rich.

LanguageEnglish
Pages521-529
Number of pages9
JournalLiquid Crystals
Volume12
Issue number3
DOIs
Publication statusPublished - 1 May 1992
Externally publishedYes

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Liquid Crystals
Surface-Active Agents
Liquid crystals
Surface active agents
surfactants
liquid crystals
Cationic surfactants
Nuclear magnetic resonance spectroscopy
Optical microscopy
Crystalline materials
Water
Liquids
microscopy
Chemical analysis
nuclear magnetic resonance
liquids
water
spectroscopy

Cite this

Fuller, S. ; Hopwood, J. ; Rahman, A. ; Shinde, N. ; Tiddy, G. J. ; Attard, G. S. ; Howell, O. ; Sproston, S. / Amphitropic liquid crystals : Two lamellar phases in a surfactant containing thermotropic and lyotropic mesogenic groups. In: Liquid Crystals. 1992 ; Vol. 12, No. 3. pp. 521-529.
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Amphitropic liquid crystals : Two lamellar phases in a surfactant containing thermotropic and lyotropic mesogenic groups. / Fuller, S.; Hopwood, J.; Rahman, A.; Shinde, N.; Tiddy, G. J.; Attard, G. S.; Howell, O.; Sproston, S.

In: Liquid Crystals, Vol. 12, No. 3, 01.05.1992, p. 521-529.

Research output: Contribution to journalArticle

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