Effect of particle shape and size on flow properties of lactose powders--颗粒学报PARTICUOLOGY

Fu, X., Huck, D., Makein, L., Armstrong, B., Willen, U., & Freeman, T. (2012). Effect of particle shape and size on flow properties of lactose powders. Particuology, 10(2), 203–208. https://doi.org/10.1016/j.partic.2011.11.003

Effect of particle shape and size on flow properties of lactose powders

Xiaowei Fu ^a *, Deborah Huck ^b, Lisa Makein ^b, Brian Armstrong ^a, Ulf Willen ^b, Tim Freeman ^a

a Freeman Technology, 1 Miller Court, Severn Drive, Tewkesbury, Gloucestershire GL20 8DN, UK
b Malvern Instruments Ltd, Enigma Business Park, Grovewood Rd., Malvern, Worcestershire WR14 1XZ, UK

10.1016/j.partic.2011.11.003

Volume 10, Issue 2, April 2012, Pages 203-208

Received 26 September 2011, Revised 28 October 2011, Accepted 12 November 2011, Available online 21 February 2012.

E-mail: xiaowei.fu@freemantech.co.uk

Highlights

► The dynamic, shear and bulk properties of the powders were examined.

► Samples were chosen to allow isolation of particle size and particle shape effects.

► Both particle size distribution and shape significantly affect all flow properties.

► Modification of the shape of powder can alter the flow properties more efficiently.

Abstract

The shape and size of particles are understood to affect the bulk behaviour of powders, though there are but few studies that present quantitative information on the relationship between particle shape and the flow properties of powder. This is due in part to the lack of techniques for rapidly determining both particle shape and the range of flow characteristics that describe the response of powders to the stress and shear experienced during their processing. This study presents data that quantifies the influence of particle shape/size of three different lactose powders on their respective flow and bulk characteristics. Two of the samples differ in size but have similar shapes; the third sample is more spherical but similar in size to one of the other two samples. The results demonstrate that in addition to particle size, particle shape significantly affect the flow characteristics of a powder over a wide range of stress conditions.

Graphical abstract

Keywords

Particle; Shape; Size; Powder flow; Flowability

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