Titanium white modification with silica nanoparticles and formation of structured clusters on vibrating screen
- PDF / 2,362,922 Bytes
- 10 Pages / 595.276 x 790.866 pts Page_size
- 83 Downloads / 158 Views
ORIGINAL PAPER
Titanium white modification with silica nanoparticles and formation of structured clusters on vibrating screen Aleš Slíva1 · Robert Brázda1 · Aleš Procházka1 · Jana Petrů3 · Karla Čech Barabaszová2 · Gražyna Simha Martynková2,4 Received: 7 July 2019 © Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract The behaviour of titanium white ( TiO2) particles with particle size smaller than 45 μm during the modification with nanoparticles (5–50 nm) of hydrophobic silica powder on the vibrating screen and following examination of the newly formed particle clusters is described. Using the vibrating screen aerated in certain places using loudspeaker the subsequent fluidization of the titania particles via simultaneous modification with silica was achieved. The particles of titania are being less cohesively bounded, the van der Walls are weaker and flowability of the system is radically improved. By the targeted fluidization of regions on the screen, was possible to experiment with resulting shapes of particle clusters from the nanoparticles of silica and titanium white in this research. Resulting structure can appear at approximately 2 s of 222.32 Hz excitation using loudspeaker acoustic waves. Methyl groups of hydrophobic nanoparticles of silica can be source for advanced surface applications. Graphic abstract
Keywords Titanium white · Silica · Particle clusters · Acoustic waves · Vibrating screens
* Aleš Slíva [email protected] 1
2
Institute of Transport, Faculty of Mechanical Engineering, VSB-Technical University of Ostrava, 17. Listopadu 2172/15, 70800 Ostrava‑Poruba, Czech Republic Nanotechnology Centre, VSB-Technical University of Ostrava, 17. Listopadu 2172/15, 70800 Ostrava‑Poruba, Czech Republic
3
Department of Machining, Assembly and Engineering Metrology, Faculty of Mechanical Engineering, VSB-Technical University of Ostrava, 17. Listopadu 2172/15, 70800 Ostrava‑Poruba, Czech Republic
4
IT4Innovations Centre of Excellence, VSB-Technical University of Ostrava, 17. Listopadu 15/2172, 70833 Ostrava‑Poruba, Czech Republic
13
Vol.:(0123456789)
64
Page 2 of 10
1 Introduction Granular materials are simple: they are large conglomerations of discrete macroscopic particles. The particles of titania white are known to be cohesive particles with relatively high interparticle attractive forces tend to clump together or self-agglomerate to form granules. The number of methods, when modification of particular matter is possible is growing; however the modification with no side products and economical effect is often demanded [1–4]. Other approaches how to combine the two oxides important in materials engineering field, where some of them are modification by repeated deposition–hydrolysis–calcination [5] or silica coupling agent modifying the surface of titanium oxide nanoparticles [6] or simple sol–gel process [7], are only selected cases for the important industrial area of demanded application such as photovoltaics, biodiesel production catalysts [8] or phot
Data Loading...
