Abstract
The interfacial tension of Polyethylene glycol (PEG)/potassium phosphate two-phase systems was measured by the rotating drop method. The interfacial tension was as low as 0.001 dyne/cm and increased with increases in the total concentrations of both PEG and potassium phosphate in two-phase systems. The increase in the interfacial tension was a function of the concentration differences of PEG and potassium phosphate between the top and the bottom phases which was confirmed by the tie line analysis. The interfacial tension was affected also by the molecular weight of PEG. At low PEG molecular weights, the increase in the molecular weight greatly increased the interfacial tension, but at high molecular weights, the interfacial tension varied less with the molecular weight.
| Original language | English |
|---|---|
| Pages (from-to) | 25-34 |
| Number of pages | 10 |
| Journal | Physics and Chemistry of Liquids |
| Volume | 38 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 2000 |
Bibliographical note
Funding Information:This research was supported in part by the Center for Advanced Food Science and Technology of Korea University, a center of recommendation for SRC of the Korea Science and Engineering Foundation (CAFST research paper No. 9701 1).
Keywords
- Aqueous two-phase system
- Interfacial tension
- PEG
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Physical and Theoretical Chemistry
- Materials Chemistry