Some structural transformations in TTAB aggregated ternary systems as seen by positron lifetime spectroscopy

Singh, K. Chandramani; Khani, P Hossein; Yadav, Rohit; Jain, P. C.

doi:10.1016/j.colsurfa.2004.11.014

Cited by 3 publications

(3 citation statements)

References 27 publications

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“…This had been checked repeatedly. Furthermore, conclusions drawn based on these data agree well with the facts already established by other conventional techniques [9][10][11]15]. In the present investigations, the mother solutions consisting of 50, 75, 1000 m M of TTAB in Pentanol, 10, 25, 50, 75 m M of CTAB in Hexanol were used.…”

supporting

confidence: 82%

“…These investigations have demonstrated the sensitivity of positron lifetime parameters in detecting various microstructural changes taking place in surfactant solutions. Besides this, it revealed the existence of two kinds of lamellar structures referred to as D 1 and D 2 phases in the systems, which were otherwise considered to be a single D phase by other conventional techniques [9,10]. In the present work, positron annihilation technique has been used to investigate the less studied L 2 phase of CTAB/hexanol/water and TTAB/pentanol/water.…”

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confidence: 96%

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Detection of bicontinuous phase in some reverse micellar systems by positron lifetime spectroscopy

Yadav¹,

Singh²,

Choudhary³

et al. 2007

Phys. Status Solidi (c)

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Positron lifetime measurements have been made in some reverse micellar systems of cetyl tri methyl ammonium bromide (CTAB)/hexanol and tetra-decyl-tri-methyl-ammonium-bromide (TTAB)/pentanol by adding increasing amount of water in each system. For both the systems, the dependence of positron lifetime parameters on water concentration indicates the existence of bicontinuous phase in so called single reverse micellar phase. The results of this investigation have been presented in this paper.1 Introduction Cationic surfactants CTAB and its lower homologue TTAB of general formula, RN(CH 3)3Br, where R is an alkyl chain, have interesting applications in pharmaceutical, industrial and technological fields. They are among the most widely used bactericides, wetting and antistatic agents. CTAB and TTAB when dissolved in different solvents give rise to several aggregated phases. Detailed phase diagrams of CTAB/hexanol/water and TTAB/pentanol/water as given by Ekwall et al.[1] and Choudhary et al. [2] respectively, depict such phases. They show the existence of four phases namely the normal micellar phase L 1, the reverse micellar phase L2, lamellar phase D and liquid crystalline hexagonal phase E. L1 phase of this system has been extensively studied by several techniques [3,4]. However, few results have been reported to elucidate the detailed microstructure of the L2 phase. Recently positron lifetime spectroscopy has been employed to investigate normal micellar and lamellar phase of these systems [5][6][7][8]. These investigations have demonstrated the sensitivity of positron lifetime parameters in detecting various microstructural changes taking place in surfactant solutions. Besides this, it revealed the existence of two kinds of lamellar structures referred to as D 1 and D 2 phases in the systems, which were otherwise considered to be a single D phase by other conventional techniques [9,10]. In the present work, positron annihilation technique has been used to investigate the less studied L 2 phase of CTAB/hexanol/water and TTAB/pentanol/water.

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supporting

confidence: 82%

mentioning

confidence: 96%

Detection of bicontinuous phase in some reverse micellar systems by positron lifetime spectroscopy

Yadav¹,

Singh²,

Choudhary³

et al. 2007

Phys. Status Solidi (c)

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“…Surfactant + water + oil systems have been extensively investigated in view of structural formations, phase stability, self organization processes, and interaction among constituents [11]. Intermediate chain alcohols are usually added to surfactant solutions in order to improve their characteristics.…”

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confidence: 99%

Compared properties of textures of lyotropic mesophases of binary and ternary systems based on tetradecyltrimethyl ammonium bromide

Masalci

Kazancı

2009

Journal of Molecular Structure

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Phase diagram of tetradecyltrimethylammonium bromide (TTAB)+water+octanol system with application of mechanical deformation

Yavuz

Masalci

Kazancı

2014

Applied Surface Science

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Some structural transformations in TTAB aggregated ternary systems as seen by positron lifetime spectroscopy

Cited by 3 publications

References 27 publications

Detection of bicontinuous phase in some reverse micellar systems by positron lifetime spectroscopy

Detection of bicontinuous phase in some reverse micellar systems by positron lifetime spectroscopy

Compared properties of textures of lyotropic mesophases of binary and ternary systems based on tetradecyltrimethyl ammonium bromide

Phase diagram of tetradecyltrimethylammonium bromide (TTAB)+water+octanol system with application of mechanical deformation

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