Relationship Between Water Mobility and Viscosity of Nanometric Alumina Suspensions
Abstract:Addition of fructose has been shown to reduce the viscosity of aqueous suspensions of nanometric alumina powders. Highly concentrated and flowable aqueous nanometric alumina suspensions were achieved by fructose addition. Oxygen-17 nuclear magnetic resonance spectroscopy was used to investigate the relaxation time and the molecular mobility of water in the suspensions with and without fructose. It was found that a significant fraction of water is bound to the surface with lower mobility. Average water mobility increases and the viscosity of the suspension decreases with fructose addition, both of which are because of displacement of water from the alumina surface by fructose molecules. The results were related to rheological behavior of the suspensions.
Document Type: Research Article
Affiliations: 1: Department of Materials Science and Engineering, Iowa State University, Ames, Iowa 50011 2: Ames Laboratory, Iowa State University, Ames, Iowa 50011 3: Department of Mechanical Engineering, Saginaw Valley State University, University Park, Michigan 48710
Publication date: October 1, 2005