Properties of Polyvinylpyrrolidone in a Deep Eutectic Solvent

Liel Sapir; Christopher B. Stanley; Daniel Harries

doi:10.1021/acs.jpca.5b11927

Properties of Polyvinylpyrrolidone in a Deep Eutectic Solvent

Liel Sapir, Christopher B. Stanley, Daniel Harries

Scalable Biomedical Modeling

Research output: Contribution to journal › Article › peer-review

54 Scopus citations

Abstract

Deep eutectic solvents (DES) are mixtures of two or more components with high melting temperatures, which form a liquid at room temperature. These DES hold great promise as green solvents for chemical processes, as they are inexpensive and environmentally friendly. Specifically, they present a unique solvating environment to polymers that is different from water. Here, we use small angle neutron scattering to study the polymer properties of the common, water-soluble, polyvinylpyrrolidone (PVP) in the prominent DES formed by a 1:2 molar mixture of choline chloride and urea. We find that the polymer adopts a slightly different structure in DES than in water, so that at higher concentrations the polymer favors a more expanded conformation compared to the same concentration in water. Yet, the osmotic pressure of PVP solutions in DES is very similar to that in water, indicating that both solvents are of comparable quality and that the DES components interact favorably with PVP. The osmotic pressure measurements within this novel class of promising solvents should be of value toward future technological applications as well as for osmotic stress experiments in nonaqueous environments.

Original language	English
Pages (from-to)	3253-3259
Number of pages	7
Journal	Journal of Physical Chemistry A
Volume	120
Issue number	19
DOIs	https://doi.org/10.1021/acs.jpca.5b11927
State	Published - May 19 2016

Funding

We thank Werner Kunz for introducing us to DES. The authors thank Uri Raviv for allowing us use of the osmometer and for his continuing support. This project was supported by the International Network Grant of the Leverhulme Trust. L.S.s travel to ORNL was funded through the Aharon and Ephraim Katzir Fellowship of the Batsheva de Rothschild Fund and through the R. Rahamimoff travel grant program of the US Israel Binational Science Foundation (BSF). A portion of this research at ORNLs Spallation Neutron Source was sponsored by the Scientific User Facilities Division, Office of Basic Energy Sciences, U.S. Department of Energy. L.S. is supported by the Adams Fellowship Program of the Israel Academy of Sciences and Humanities. The Fritz Haber Research Center is supported by the Minerva Foundation, Munich, Germany.

Funders	Funder number
Batsheva de Rothschild Fund
Office of Basic Energy Sciences
Scientific User Facilities Division
US Israel Binational Science Foundation
U.S. Department of Energy
Bloom's Syndrome Foundation
Leverhulme Trust
Minerva Foundation
Israel Academy of Sciences and Humanities

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10.1021/acs.jpca.5b11927

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abstract = "Deep eutectic solvents (DES) are mixtures of two or more components with high melting temperatures, which form a liquid at room temperature. These DES hold great promise as green solvents for chemical processes, as they are inexpensive and environmentally friendly. Specifically, they present a unique solvating environment to polymers that is different from water. Here, we use small angle neutron scattering to study the polymer properties of the common, water-soluble, polyvinylpyrrolidone (PVP) in the prominent DES formed by a 1:2 molar mixture of choline chloride and urea. We find that the polymer adopts a slightly different structure in DES than in water, so that at higher concentrations the polymer favors a more expanded conformation compared to the same concentration in water. Yet, the osmotic pressure of PVP solutions in DES is very similar to that in water, indicating that both solvents are of comparable quality and that the DES components interact favorably with PVP. The osmotic pressure measurements within this novel class of promising solvents should be of value toward future technological applications as well as for osmotic stress experiments in nonaqueous environments.",

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N2 - Deep eutectic solvents (DES) are mixtures of two or more components with high melting temperatures, which form a liquid at room temperature. These DES hold great promise as green solvents for chemical processes, as they are inexpensive and environmentally friendly. Specifically, they present a unique solvating environment to polymers that is different from water. Here, we use small angle neutron scattering to study the polymer properties of the common, water-soluble, polyvinylpyrrolidone (PVP) in the prominent DES formed by a 1:2 molar mixture of choline chloride and urea. We find that the polymer adopts a slightly different structure in DES than in water, so that at higher concentrations the polymer favors a more expanded conformation compared to the same concentration in water. Yet, the osmotic pressure of PVP solutions in DES is very similar to that in water, indicating that both solvents are of comparable quality and that the DES components interact favorably with PVP. The osmotic pressure measurements within this novel class of promising solvents should be of value toward future technological applications as well as for osmotic stress experiments in nonaqueous environments.

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Properties of Polyvinylpyrrolidone in a Deep Eutectic Solvent

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