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 |
| Publication status | Published - 2000 Jan 1 |
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Keywords
- Aqueous two-phase system
- Interfacial tension
- PEG
ASJC Scopus subject areas
- Physical and Theoretical Chemistry
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
Cite this
Interfacial tension of polyethylene glycol/potassium phosphate aqueous two-phase systems. / Kim, Chan Wha; Rha, Chokyun.
In: Physics and Chemistry of Liquids, Vol. 38, No. 1, 01.01.2000, p. 25-34.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Interfacial tension of polyethylene glycol/potassium phosphate aqueous two-phase systems
AU - Kim, Chan Wha
AU - Rha, Chokyun
PY - 2000/1/1
Y1 - 2000/1/1
N2 - 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.
AB - 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.
KW - Aqueous two-phase system
KW - Interfacial tension
KW - PEG
UR - http://www.scopus.com/inward/record.url?scp=0033919822&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0033919822&partnerID=8YFLogxK
M3 - Article
VL - 38
SP - 25
EP - 34
JO - Physics and Chemistry of Liquids
JF - Physics and Chemistry of Liquids
SN - 0031-9104
IS - 1
ER -