Fractal Aspects of Static and Dynamic Flow Properties of Pharmaceutical Excipients
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Autor:innen
Autor:in (Körperschaft)
Publikationsdatum
11/2017
Typ der Arbeit
Studiengang
Sammlung
Typ
01A - Beitrag in wissenschaftlicher Zeitschrift
Herausgeber:innen
Herausgeber:in (Körperschaft)
Betreuer:in
Übergeordnetes Werk
Journal of Pharmaceutical Innovation
Themenheft
DOI der Originalpublikation
Link
Reihe / Serie
Reihennummer
Jahrgang / Band
Ausgabe / Nummer
Seiten / Dauer
1-12
Patentnummer
Verlag / Herausgebende Institution
Springer
Verlagsort / Veranstaltungsort
Auflage
Version
Programmiersprache
Abtretungsempfänger:in
Praxispartner:in/Auftraggeber:in
Zusammenfassung
Purpose
Characterisation of powder flow is important for pharmaceutical processing and manufacturing. This work aims at a better understanding of how fractal particle and bulk properties affect the static and dynamic flow of excipients.
Methods
Traditional methods of flowability testing, e.g. the angle of repose or the flow through an orifice, were complemented by avalanching in a rotational drum. Dynamic image analysis provided a fractal contour line dimension of the powder bulk in the drum (bD F ). This was compared to the contour line fractal dimension of particles (pD F ) as obtained from the box-counting method. Avalanche testing was able to measure also cohesive materials that were otherwise difficult or not measurable at all using the classical methods.
Results
The values of the avalanche energy were in good agreement with the different flow properties of the samples. These flow properties showed good correlations with bD F in that poor flow properties were associated with a more rugged contour line of the bulk and hence higher bD F .
Conclusions
Interestingly, there was no correlation observed between pD F and bD F , which may suggest that a distinct bulk structure typically emerges from the particles under dynamic flow. Future research should further clarify how fractal powder aspects affect pharmaceutical manufacturing processes.
Schlagwörter
Flowability, Avalanching, Dynamic behaviour, Rotating drum, Particle fractal dimension, Bulk fractal dimension
Fachgebiet (DDC)
Veranstaltung
Startdatum der Ausstellung
Enddatum der Ausstellung
Startdatum der Konferenz
Enddatum der Konferenz
Datum der letzten Prüfung
ISBN
ISSN
1872-5120
1939-8042
1939-8042
Sprache
Englisch
Während FHNW Zugehörigkeit erstellt
Ja
Publikationsstatus
Veröffentlicht
Begutachtung
Peer-Review der ganzen Publikation
Open Access-Status
Lizenz
Zitation
HURYCHOVÁ, Hana, Zdenka ŠKLUBALOVÁ und Martin KUENTZ, 2017. Fractal Aspects of Static and Dynamic Flow Properties of Pharmaceutical Excipients. Journal of Pharmaceutical Innovation. November 2017. S. 1–12. DOI 10.1007/s12247-017-9302-0. Verfügbar unter: http://hdl.handle.net/11654/25839