Powder Rheology of Nanocrystalic Particles.

0484831 - ÚCHP 2018 CZ eng C - Conference Paper (international conference)
Kulaviak, Lukáš - Pěnkavová, Věra - Růžička, Marek - Punčochář, Miroslav - Zámostný, P. - Grof, Z. - Štěpánek, F. - Schöngut, M. - Havlica, Jaromír
Powder Rheology of Nanocrystalic Particles.
Sborník. Pardubice: CHEMAGAZÍN s.r.o., 2017, s. 60. ISBN 978-80-906269-2-8.
[Konference pigmenty a pojva /10./. hotel Jezerka, přehrada Seč (CZ), 06.12.2017-07.12.2017]
Institutional support: RVO:67985858
Keywords : moisture * electrostatic charging * powder history
OECD category: Chemical process engineering
http://www.pigmentyapojiva.cz/assets/kpp2017-sbornik.pdf

Pigments are mostly nanometric powder of anisometric particles providing complex rheological behaviour. The interparticle forces of grains (> 100 μm) are based on direct contact, which is mainly influenced by the particle size and shape. On the other hand powder (< 4 μm) and especialy nanometric powder (< 100 nm) is influenced mainly by electrostatic charges and by moisture (respectively by the liquid and solid bridges forming). However the morphology affects the surface area and thus the distribution of surface charge and
the moisture content on/in single particle. Last but not least, it is also good to know the history of the powder, i.e. the effect of aging and the memory of the powder on the strength of the material. The nanometric powder TiO2 was chosen as a demonstration material and measuring device was FT4 powder rheometer.
Permanent Link: http://hdl.handle.net/11104/0279962