Abstract
Dispersions of bare zirconia nanoparticles are not redispersable after a strong osmotic compression. In order to obtain a spontaneous redispersion from concentrated pastes, the surfaces of particles have been complexed by organic molecules (acetylacetone, acetic acid, citric acid, and diethanolamine) prior to compression. Controlled cycles of deswelling‐reswelling have been performed using the osmotic stress method in order to test the reversibility of the compression. Osmotic pressure and small‐angle X‐ray scattering measurements indicate that the chemical nature of a complexant is of the highest importance to control the interaction potential between particles.
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