| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 642714 | Separation and Purification Technology | 2011 | 6 Pages |
The main purpose of this article is to verify the new stabilization mechanism caused by the formation of nanoparticle halos [V. Tohver, J.E. Smay, A. Braem, P.V. Braun, J.A. Lewis, Nanoparticle halos: a new colloid stabilization mechanism, Proc. Natl. Acad. Sci. U.S.A. 98 (2001) 8950], by adding different volume fractions of slightly positive charged zirconia nanoparticles in the negative charged micro-latex suspensions of different sizes, and observe the effect on stabilizing the suspension via jar settling experiments. The experimental results confirm that the zirconia nanoparticles do stabilize the micro-colloidal suspension at an optimal volume fraction in a finite volume settling system. The osmotic pressure exerted by nanoparticles on micro-colloids is applied to explain our experimental results.
Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► In this study, we conducted a series of jar settling experiments by adding different volume fractions of slightly positive charged zirconia nanoparticles in the negative charged micro-latex suspensions. ► We confirm that the zirconia nanoparticles do stabilize the micro-colloidal suspension at an optimal volume fraction in a finite volume settling system. ► We verify the new stabilization mechanism caused by the formation of nanoparticle halos proposed by Prof. J.A. Lewis et al. [PNAS 98 (2001) 8950–8954].
