Bauduin, Pierre and Wattebled, Laurent and Touraud, Didier and Kunz, Werner (2004) Hofmeister ion effects on the phase diagrams of water-propylene glycol propyl ethers. ZEITSCHRIFT FUR PHYSIKALISCHE CHEMIE-INTERNATIONAL JOURNAL OF RESEARCH IN PHYSICAL CHEMISTRY & CHEMICAL PHYSICS, 218 (6). pp. 631-641. ISSN 0942-9352
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The influence of different salts on the lower critical solution temperature (LCST) of mixtures of propylene glycol propyl ether and of dipropylene glycol propyl ether with water was determined experimentally. It was observed that the temperature shifts follow precisely the same Hofmeister series for anions that was originally found for salting-in and salting-out effects for protein solutions. The results are similar to the observations found for mixtures of water with non-ionic surfactants. In the case of dipropylene glycol propyl ether mixtures with water, temperature dependent phase diagrams in the presence of one salting-in (NaSCN) and one salting-out (Na2SO4) salt were measured at a fixed salt concentration in water of 0.041 M. The results can be qualitatively understood by assuming a different hydrophobicity for both types of salts. They further hint at a strong degree of solute determined cooperative water structure.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | ELECTROLYTE-SOLUTIONS; SURFACTANTS; BINDING; LIQUID; MICROEMULSIONS; INTERFACE; STABILITY; SALTS; salt effects; cloud points; hydrotropes; nonionic surfactants |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Physikalische und Theoretische Chemie > Chair of Chemistry VI - Physical Chemistry (Solution Chemistry) > Prof. Dr. Werner Kunz |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 27 Jul 2021 09:29 |
| Last Modified: | 27 Jul 2021 09:29 |
| URI: | https://pred.uni-regensburg.de/id/eprint/38298 |
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