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    Evaporation of aqueous solutions of organic acids through spread films of poly(diallyldimethylammonium chloride)/sodium dodecylsulfate complex

    Year: 2017

    Journal: Sep. Sci. Technol., Volume 52, page 943–950

    Authors: Kuznetsov, Viktor; Akentiev, Alexander; Rakhimov, Viktor

    Organizations: St. Petersburg State University [12.38.257.2014]; Russian Foundation of Basic Research (RFFI) [14-03-00670_a]

    Keywords: Polyelectrolyte; surfactant complexes; rate of evaporation; selectivity; spread films; surface tension

    The films with the extreme concentration of poly (diallyldimethylammonium chloride)/sodium dodecylsulfate complex spread to the surface of aqueous solutions of formic and acetic acids reduce the evaporation rate of liquids by 3-6% and demonstrate selective properties increasing water content in the vapor by 1-3 abs.%. The concentrations of solutions were up to 30 vol.%. The formation conditions of such films were determined by means of the Wilhelmy plate technique. Surface tension isotherms of aqueous solutions of acids were also obtained.
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