The effect of salt and temperature on the liquid-liquid phase diagrams of aqueous Poly propylen Glycol + Salt Solutions

Sadeghi, Rahmat and Jamehbozorg, Bahman (2008) The effect of salt and temperature on the liquid-liquid phase diagrams of aqueous Poly propylen Glycol + Salt Solutions. In: 11th Iranian Physical Chemistry Seminar-July 2008, July 2008, Ardabil, Iran.

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Abstract

Ternary aqueous solutions of water soluble polymers and certain electrolytes separate into a polymer-rich and a salt-rich phase over part of the composition space. Aqueous two-phase systems of this nature are useful for the separation and purification of biomaterials where the employment of a nonpolar solvent/aqueous phase system would lead to degredation of biological activity [1,2]. Polyethylene glycol (PEG), which is a hydrophilic polymer, is often used in aqueous two-phase partitioning studies. Polyethylene glycol (PPG) is a water-soluble polymer which has a similar structure with PEG, can also be used for the separation of biomolecules, since its aqueous solutions with a suitable polymer or a salt forms a two-phase system. Liquid-liquid equilibrium (LLE) data for some aqueous PPG + salt two-phase systems have been reported only at 298.15 and there is no report on the effect of temperature on the phase diagrams of aqueous PPG + salt systems in the literature. In this work, the phase diagrams and LLE data have been determined for aqueous two-phase systems containing PPG and sodium phosphates at various temperatures. The effect of temperature, anion charge and type of plolymer on the phase diagrams and LLE data of investigated systems have been studied. Finally, the segment based local composition wilson model [3,4] has been applied to correlate the experimental LLE data of investigated aqueous two-phase systems.

Item Type: Conference or Workshop Item (Paper)
Persian Title: The effect of salt and temperature on the liquid-liquid phase diagrams of aqueous Poly propylen Glycol + Salt Solutions
Persian Abstract: -
Subjects: Divisions > Conferences > 11th Iranian Physical Chemistry Seminar- July 2008
Conferences > 11th Iranian Physical Chemistry Seminar- July 2008
Divisions: Conferences > 11th Iranian Physical Chemistry Seminar- July 2008
Subjects > Conferences > 11th Iranian Physical Chemistry Seminar- July 2008
Date Deposited: 17 Jun 2019 05:59
Last Modified: 17 Jun 2019 05:59
URI: http://repository.uma.ac.ir/id/eprint/6852

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