Can nanoparticles stabilize microparticle suspension?

Autor: Chia-Chang Chang, You-Im Chang, Wei-You Cheng
Rok vydání: 2011
Předmět:
Zdroj: Separation and Purification Technology. 79:393-398
ISSN: 1383-5866
DOI: 10.1016/j.seppur.2011.03.028
Popis: 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.
Databáze: OpenAIRE