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Flowability characterization of nanopowders
RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Food and Bioscience, Processing.
Delft University of Technology, Netherlands.
RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Food and Bioscience, Processing.
2015 (English)In: Powder Technology, ISSN 0032-5910, E-ISSN 1873-328X, Vol. 286, p. 156-163Article in journal (Refereed) Published
Abstract [en]

The applications of nanopowders are increasing significantly over the last years. In most of these applications, the flow behavior of the nanopowders seems to be a complicated, multiparametric but critical issue for the proper design of the processes. We have investigated, classified and compared several different metal oxide nanoparticles with respect to their flow properties. The flow properties of titania, silica and alumina hydrophilic nanopowders as well as their corresponding hydrophobic counterparts were determined by means of an annular shear cell powder flow tester (PFT). All the tested powders showed difficulties in flow while the titania nanopowders showed the highest difficulty among them. The results acquired regarding the compressibility, the flow functions and the effective angle of internal friction revealed that in all the cases the hydrophobic nanopowder seemed to be more cohesive than its hydrophilic counterpart. Moreover, the nanoparticles, no matter their polarity, showed negligible hygroscopicity while in the case of the alumina nanopowders the flow properties can be significantly influenced by ca. 1% (w/w) of moisture content.

Place, publisher, year, edition, pages
2015. Vol. 286, p. 156-163
Keywords [en]
Nanopowders, Flowability, Powder flow tester
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-6878DOI: 10.1016/j.powtec.2015.08.015Local ID: 29492OAI: oai:DiVA.org:ri-6878DiVA, id: diva2:964719
Available from: 2016-09-08 Created: 2016-09-08 Last updated: 2019-07-04Bibliographically approved

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