Introduction of the energy to break an avalanche as a promising parameter for powder flowability prediction
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Authors
Trpělková, Žofie
Author (Corporation)
Publication date
20.09.2020
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01A - Journal article
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Parent work
Powder Technology
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DOI of the original publication
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Volume
375
Issue / Number
Pages / Duration
33-41
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Publisher / Publishing institution
Elsevier
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Abstract
Dynamic avalanche testing is a newer method useful even with cohesive powder samples. To evaluate flow properties of pharmaceutical powder excipients, break energy (BE) is introduced as a new promising avalanche parameter. Conventional pharmacopoeial methods and an annular shear cell were utilized to characterize 23 pharmaceutical powder samples including binary mixtures. Subsequently, rotating drum avalanching was studied to better understand behaviour of powders. A good linear regression between the energy to break a powder avalanche and powder cohesion with R2 = 0.823 was detected. The relationship between BE and the flow function value, estimated by shear testing, allowed to identify two samples with excellent flow functions: Cellets 100 and Neusilin US2. The latter sample also had very low BE although the mass flow rate was the poorest observed out of 23 samples. Therefore, the BE from avalanching testing seems to be a sensitive measure of cohesion and flow function behaviour.
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ISBN
ISSN
0032-5910
1873-328X
1873-328X
Language
English
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Yes
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Published
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Citation
TRPĚLKOVÁ, Žofie und Martin KUENTZ, 2020. Introduction of the energy to break an avalanche as a promising parameter for powder flowability prediction. Powder Technology. 20 September 2020. Bd. 375, S. 33–41. DOI 10.1016/j.powtec.2020.07.095. Verfügbar unter: https://irf.fhnw.ch/handle/11654/32418