Rheological behavior of hydrophilic silica dispersion in polyethylene glycol

✍ Scribed by Jong-Hwan Park; Ho-gyum Kim; Dong-Hee Han; Jeong-Cheol Lim; Dae-Hee Oh; Kyung-Eun Min

• Publisher: John Wiley and Sons
• Year: 2006
• Tongue: English
• Weight: 1015 KB
• Volume: 103
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/app.23774

✦ Synopsis

Abstract

The rheological properties of hydrophilic fumed silica dispersed in polyethylene glycol (PEG) were investigated. The dispersion was prepared by dispersing the fumed silica in PEG with various concentrations. The reversible sol–gel transition was observed over 5 wt % of silica concentration as a function of temperature. The gelation temperature was found to depend on the applied shear stress and silica concentration, and the high shear stress was found to lead to the decrease of sol–gel transition temperature of the dispersion with the same silica concentration. As the silica concentration increases, the sol–gel transition shifts to the lower temperature. © 2006 Wiley Periodicals, Inc. J Apple Polly Sci 103: 2481–2486, 2007