Suspension of nanoparticles

摘要

A method for preparing suspension of inorganic nanoparticles is described herein. The method includes mixing a dispersing medium (102) with a dispersant (104) and a metal oxide powder (106) to form a primary mixture (110), the dispersant (104) being selected based on interaction energy of the dispersant (104) with respect to the dispersing medium (102) and the metal oxide powder (106). The method further includes grinding the primary mixture (110) to obtain a suspension (116), wherein at least the dispersant (104) is added to the primary mixture (110) during the grinding after predetermined time intervals.

主权项

1. A method for preparing a suspension of metal oxide nanoparticles with an average size of less than 100 nm, the method comprising:
mixing a dispersing medium with a dispersant and a metal oxide powder with a particle size of about 0.1 to 100 microns to form a primary mixture, wherein the primary mixture includes about 10-40 wt % of the metal oxide powder, wherein the dispersant is sodium citrate or citric acid, and wherein the dispersing medium is water; dispersing the primary mixture to form a slurry of the primary mixture; grinding the slurry of the primary mixture at 234 revolutions per minute (rpm) or at about 420 rpm to obtain a suspension, wherein during the grinding, a further amount of the dispersant and the dispersing medium are added to the slurry of primary mixture at predetermined time intervals; adding a further amount of the dispersant and the dispersing medium to the suspension to obtain a diluted suspension; and dispersing the diluted suspension to obtain dispersed diluted suspension.