NDLI: Influence of Polydimethylsiloxane on the Oxygen Concentration of Oils at Various Temperatures

Content Provider	Springer Nature Link
Author	Gerde, Jose A. Hammond, Earl G. White, Pamela J.
Copyright Year	2011
Abstract	The effect of temperature on the oil oxygen concentration, tested in both soybean and olive oils with no added polydimethylsiloxane (PDMS), showed that the oxygen concentration increased with temperature to approximately 100 °C. Above 100 °C, the oxygen concentration abruptly decreased. This change was attributed to the balance between the rates of oxygen uptake and consumption by oil oxidation, which favored oxygen consumption over uptake at temperatures above 100 °C. The addition of 100 ppb PDMS to soybean oil, enough to form a continuous layer over the surface of the oil, reduced the oxygen concentration when compared to a soybean oil control containing no added PDMS at temperatures ranging from 93 to 180 °C; thus suggesting an oxygen barrier effect of PDMS. The accumulation of PDMS at the air–oil interface in soybean oil held at 180 °C was determined by comparing the oil’s internal temperature and the apparent surface temperature. A decrease in the apparent surface temperature while the oil was held at a constant internal temperature was attributed to a change in the emissivity of the surface as a consequence of the accumulation of PDMS in the air–oil interface. The presence of PDMS at the air–oil interface was confirmed for 100 ppm of PDMS, a concentration greater than the concentration necessary to form a monolayer of PDMS on the oil surface.
Starting Page	925
Ending Page	929
Page Count	5
File Format	PDF
ISSN	0003021X
Journal	Journal of the American Oil Chemists' Society
Volume Number	88
Issue Number	7
e-ISSN	15589331
Language	English
Publisher	Springer-Verlag
Publisher Date	2011-02-11
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Oxygen concentration Polydimethylsiloxane Soybean oil Oil surface temperature Biomaterials Biotechnology Food Science Industrial Chemistry/Chemical Engineering Agriculture
Content Type	Text
Resource Type	Article
Subject	Organic Chemistry Chemical Engineering

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