Abstract
The effect of the type of surfactant and pH on de-agglomeration of a hydrophilic silica nanopowder in a high shear mixer was investigated. It has been found that the presence of surfactant does not affect the general pattern of de-agglomeration characterized by the transition of a single modal aggregates size distribution with the median of 10 mu m, through a bi-modal distributions with the second median of the order of 100 run to a single modal distribution with the median of the order of 100 run. None of the investigated surfactants enabled de-agglomeration of the nano-powder into a primary nanoparticle.
| Original language | English |
|---|---|
| Journal | Journal of Dispersion Science Technology |
| Volume | 4 |
| DOIs | |
| Publication status | Published - 1 Jan 2008 |
Keywords
- surfactants
- secondary aggregates
- primary aggregates
- silica nanoparticles
- de-aggregation