Contact behavior of size fractionated TiO2 nanoparticle agglomerates and aggregates

The size dependent contact behavior of nanoparticle agglomerates was studied. Size fractionated TiO2 nanoparticle agglomerates were synthesized with a combination of a flame spray reactor and a differential mobility analyzer resulting in four different agglomerate sizes (median values from 78 to 161...

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Bibliographic Details
Published inPowder technology Vol. 256; pp. 345 - 351
Main Authors Salameh, Samir, Scholz, Rebecca, Seo, Jin Won, Mädler, Lutz
Format Journal Article
LanguageEnglish
Published Amsterdam Elsevier B.V 01.04.2014
Elsevier
Subjects
Applied sciences
Chemical engineering
Contact mechanic
Exact sciences and technology
Fluidization
Miscellaneous
Nanoparticle agglomerates
Reactors
Solid-solid systems
Nanoparticle agglomerates
Contact mechanic
Fluidization
Atomic force microscopy
Tensile stress
Nanoparticle
Size effect
Aggregate
Titanium oxide
Reactor
Modeling
Flame
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Summary:The size dependent contact behavior of nanoparticle agglomerates was studied. Size fractionated TiO2 nanoparticle agglomerates were synthesized with a combination of a flame spray reactor and a differential mobility analyzer resulting in four different agglomerate sizes (median values from 78 to 161nm). Contact behavior of the fractionated agglomerates was investigated using atomic force microscopy. A model of the contact behavior of agglomerates under tensile stress was established in which the aggregates within the agglomerates rearrange and form chains before breakage. Force curves show that the length of the chains and the amount of rearrangements depend on the agglomerate sizes. Larger agglomerates require more work for their aggregate rearrangement before the final breakage is induced. [Display omitted]
ISSN:0032-5910
1873-328X
DOI:10.1016/j.powtec.2014.02.042