Evaporation of aqueous solutions of organic acids through spread films of sodium polystyrene sulfonate/dodecyl trimethyl ammonium bromide complex

Abstract

The Wilhelmy plate technique was used to determine surface tension isotherms of aqueous solutions of formic and acetic acids with concentration up to 30 vol% and with a film of solution of sodium polystyrene sulfonate/dodecyl trimethyl ammonium bromide complex spread to the surface. The formation conditions of films with the extreme concentration of the complex were determined. Such films reduce the evaporation rate of binary liquids by 3-6% and demonstrate selective properties increasing the water content in the vapor by 2-5 abs%.

Keywords:

• Polyelectrolyte/surfactant complexes
• spread films
• surface tension
• rate of evaporation
• selectivity

ORCID

Viktor Kuznetsov

http://orcid.org/0000-0003-4023-6598

Alexander Akentiev

http://orcid.org/0000-0001-7327-6348