Formulation of aqueous concentrated alumina suspensions. Influence of a disaccharide: trehalose

✍ Scribed by Cécile Pagnoux; Frédéric Poeydemenge; Jean-François Baumard

• Publisher: John Wiley and Sons
• Year: 2003
• Tongue: English
• Weight: 146 KB
• Volume: 52
• Category: Article
• ISSN: 0959-8103
• DOI: 10.1002/pi.1068

✦ Synopsis

Abstract

Trehalose, a disaccharide, is very well known to protect living cells efficiently from dehydration and has been tested in the formulation of aqueous alumina suspensions. It has been added into slurries stabilized with Tiron®, (HO)~2~C~6~H~2~(SO~3~Na)~2~, which permits a high state of dispersion by creating repulsive potential between particles. Trehalose added into such suspensions acts as a lubricant and enhances flowing properties of suspensions because of its strong interaction with water which breaks the hydrogen‐bonded network of the solvent. Trehalose addition is beneficial for carrying out shaping methods of alumina components by coagulation as it increases solid concentration in the suspension, which facilitates pouring the suspension into a mould. Unfortunately this addition hinders coagulation of particles.

© 2003 Society of Chemical Industry