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Liquid Crystals and their Application
Russian Journal

Zhidkie kristally i ikh prakticheskoe ispol'zovanie

Жидкие кристаллы и их практическое использование

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Rus Eng


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Zhidk. krist. ikh prakt. ispol'z. = Liq. Cryst. and their Appl., 2018, 18 (4), 16—26.
DOI: 10.18083/LCAppl.2018.4.16

Polymer-Colloid Complexes Based on a Novel Amphiphilic Heterocycle: Aggregation and Solubilization Characteristics

D. R. Gabdrakhmanov, D. A. Kuznetsova, E. A. Vasilieva, E. S. Krylova, L. F. Saifina, V. E. Semenov, L. Ya. Zakharova

Author affiliations
Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center of RAS,
8 Arbuzov St., Kazan, 420088, Russia

Supramolecular systems based on a novel cationic amphiphile bearing 1,2,3-triazole head groups and three hydrophobic tails of various length (n-pentyl, n-octyl and n-decyl) as well as polyacrylic acid acting as polyelectrolyte have been fabricated. It was shown, that noncovalent modification of supramolecular system by polyacrylic acid is capable to reduce the aggregation thresholds of aqueous solutions from 0,56 to 0,04 mМ. Thermodynamic adsorption parameters for individual surfactant solutions and surfactant/polyelectrolyte binary systems were calculated. In accordance with them, conclusions about the specificity of amphiphile packing mode at the air/liquid interface have been made. Formation of aggregates with the hydrodynamic diameter more than 100 nm in the absence and in the presence of polyelectrolyte was revealed. It was determined, that the electrokinetic potential of individual surfactant solutions varies in the range from +20 to +80 mV. The addition of surfactants to polyelectrolyte induces the charge compensation at the amphiphile concentration of 0,16 mM, when the isoelectric point is reached. It was demonstrated that solubilization properties of system could be increased more than 10-fold by transition from individual surfactant solutions to surfactant/polyelectrolyte binary system.

Keywords: 1,2,3-triazoles, amphiphile, polyelectrolyte, polyacrylic acid, aggregation, solubilization

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