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Atomization and Sprays
IF: 1.737 5-Year IF: 1.518 SJR: 0.814 SNIP: 1.18 CiteScore™: 2.2

ISSN Print: 1044-5110
ISSN Online: 1936-2684

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Atomization and Sprays

DOI: 10.1615/AtomizSpr.2017019439
pages 457-464

PRODUCTION OF POLYMER MICROPARTICLES BY ELECTROSPRAY ATOMIZATION

Sören Sander
Foundation Institute of Materials Science, Bremen, Germany
Cody Tischler
Department of Chemical and Materials Engineering, University of Alberta, Alberta, Canada
Lydia Achelis
Department of Particles and Process Engineering, University of Bremen; Foundation Institute of Materials Science, Badgasteiner Str. 3, D-28359 Bremen, Germany
Hani Henein
Department of Chemical and Materials Engineering, University of Alberta, Alberta, Canada
Udo Fritsching
Department of Particles and Process Engineering, University of Bremen; Foundation Institute of Materials Science, Badgasteiner Str. 3, D-28359 Bremen, Germany

ABSTRACT

In this study an electrospray atomizer is successfully used to generate polyvinylpyrrolidone (PVP) microparticles from polymer solutions. Experiments are performed to determine atomization enhancement by minute ion addition of NaCl to allow for an increase in flow rate or polymer concentration, thus improving the system throughput. In contrast to theoretical scaling laws, a fourfold increase in conductivity through ion addition has no significant effect on particle size. Changes in flow rate cause changes in particle size such that dQ0.5, in agreement with previous correlations. The usage of ion concentration instead of conductivity as a metric for droplet size prediction is discussed.


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