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Preparation of Binary and Ternary Deep Eutectic Systems
Published on: October 31, 2019
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Properties of Polyvinylpyrrolidone in a Deep Eutectic Solvent
Liel Sapir1, Christopher B Stanley2, Daniel Harries1
1Institute of Chemistry and The Fritz Haber Research Center, The Hebrew University , Jerusalem 91904, Israel.
The Journal of Physical Chemistry. A
|March 11, 2016
Summary
Deep eutectic solvents (DES) offer a green alternative for polymer solutions. Polyvinylpyrrolidone (PVP) in DES shows expanded conformations yet similar osmotic pressure to water, indicating favorable interactions.
Area of Science:
- Polymer Science
- Green Chemistry
- Physical Chemistry
Background:
- Deep eutectic solvents (DES) are emerging as sustainable, cost-effective alternatives to traditional solvents.
- DES offer unique solvation properties distinct from water, impacting polymer behavior.
- Polyvinylpyrrolidone (PVP) is a widely used water-soluble polymer with potential applications in DES.
Purpose of the Study:
- To investigate the structural and thermodynamic properties of polyvinylpyrrolidone (PVP) in a deep eutectic solvent (DES).
- To compare the behavior of PVP in DES with its behavior in water.
- To assess the potential of DES as solvents for polymer applications and osmotic stress studies.
Main Methods:
- Small-angle neutron scattering (SANS) was employed to probe polymer structure.
- Osmotic pressure measurements were conducted for PVP solutions in DES and water.
Main Results:
- PVP exhibited a slightly different structure in the choline chloride:urea DES compared to water.
- At higher concentrations, PVP favored a more expanded conformation in DES than in water.
- Osmotic pressures of PVP solutions in DES were comparable to those in water, suggesting similar solvent quality.
Conclusions:
- DES provide a comparable solvent environment to water for PVP, with favorable interactions between DES components and the polymer.
- The findings support the use of DES in polymer science, offering potential for novel applications and non-aqueous osmotic stress studies.
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