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Mise en suspension d'une poudre micronique par effet vortex

Abstract : New materials based on nanotechnology are reaching the market in a wide variety of consumer products. Since these nanostructured materials can be in powder form, a suspending powder system is essential for many purposes: For in vivo inhalation toxicological studies,for workers and consumers protection, for instrumental development widening aerosol measurement spectrum. Different powders suspending systems have been developed like the rotating drum or the single drop. They are used as a reference method to evaluate bulk materials dustiness. Usually cumbersome, these systems need a huge amount of powder (a few hundred grams) and require time-consuming cleaning processes which could be even more tedious when a nanostructured material and/or a toxic powder is used. The aim of this work is to evaluate the behavior of a powder suspending system by vortex effect. This system is very simple and requires a very small amount of powder (a few grams) in a tube [1,2]. It has been set up to study the dustiness under controlled and reproducible conditions. Different tests have been performed with a Al2O3 powder. They allowed not only to characterize the influence of shaking speed and powder mass, but also to measure the particle size and the number concentration as shown on the figures below
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Submitted on : Friday, April 4, 2014 - 2:11:54 PM
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  • HAL Id : ineris-00973608, version 1
  • INERIS : EN-2011-025



Aurélien Ustache, S. Thevenet, Martin Morgeneyer, Olivier Aguerre-Chariol, Olivier Le Bihan. Mise en suspension d'une poudre micronique par effet vortex. 26. Congrès Français sur les Aérosols (CFA 2011), Jan 2011, Paris, France. pp.NC. ⟨ineris-00973608⟩



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