Silicon-modified surfactants and wetting: II. Temperature-dependent spreading behaviour of oligoethylene glycol derivatives of heptamethyltrisiloxane

Authors
Wagner, R Wu, Y Czichocki, G Von Berlepsch, H Rexin, F Perepelittchenko, L
Citation
R. Wagner et al., Silicon-modified surfactants and wetting: II. Temperature-dependent spreading behaviour of oligoethylene glycol derivatives of heptamethyltrisiloxane, APPL ORGAN, 13(3), 1999, pp. 201-208
Citations number
18
Categorie Soggetti
Chemistry
Journal title
APPLIED ORGANOMETALLIC CHEMISTRY
ISSN journal
02682605 → ACNP
Volume
13
Issue
3
Year of publication
1999
Pages
201 - 208
Database
ISI
SICI code
0268-2605(199903)13:3<201:SSAWIT>2.0.ZU;2-B
Abstract
The temperature-dependent spreading performance of defined trisiloxane surf actants of the general formula [(CH3)(3)SiO](2)CH3Si(CH2)(3)(OCH2CH2)(3-9)O CH3 and Silwet L77 on a trimethylsilylated silicon-wafer surface has been i nvestigated. At 6 degrees C the tetraethylene glycol derivative showed the highest initial spreading rate. At 40 degrees C the octaethylene glycol der ivative was the fastest spreader. It is shown that spreading behaviour and phase behaviour are closely related. The highest initial spreading rates we re found for solutions in the two-phase state (2 Phi) closely above the liq uid-liquid insolubility boundary. Copyright (C) 1999 John Wiley & Sons, Ltd .