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Surface activity of solutes in hydroxypropionitrile studied by He(I) photoelectron spectroscopy - EGG lecithin, sodium oleate, malachite green and tris-(dioxa-3,6-heptyl)amine

✍ Scribed by R.E. Ballard; Jimmy Jones; Derek Read; Andrew Inchley

Publisher: Elsevier Science
Year: 1986
Tongue: English
Weight: 220 KB
Volume: 128
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(86)80148-8

No coin nor oath required. For personal study only.

✦ Synopsis

We have used He(I) photoelectron spectroscopy to measure the percent surface coverage for substances dissolved in hydroxypropionitrile, HO(CH,),CN.

The concentration at which 100% surface coverage is achieved, C,,, is an inverse measure of surface activity. Measured values of logI,(Clo,), with C,, in molarity units, in hydroxypropionitrile at 20°C are (in order of diminishing surface activity): -3.85 (egg lecithin), -2.85 (sodium oleate), -0.64 (malachite green hydroxide), and 0.34 [tris(dioxa-3,6-heptyl)amine].