Production of sub-10 micrometre cellulose microbeads using isoporous membranes

Ekanem E. Ekanem, Ainur Sabirova, Ciarán Callaghan, Janet L. Scott, Karen J. Edler, Suzana P. Nunes, Davide Mattia

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4 Citations (SciVal)

Abstract

The production of sub-10 µm cellulose microbeads via membrane emulsification using isoporous membranes is reported here for the first time. Poly(ethylene terephthalate) membranes, with defined interpore distances, pore diameters and straight-through pores were fabricated via photolithography. A dispersed phase of 8 wt% cellulose solution was extruded through the membrane pores, forming, due to shear provided by an overhead stirrer, cellulose solution droplets dispersed in a continuous phase composed of 2 wt% and 5 wt% Span in sunflower oil. Upon phase inversion with ethanol, sub-10 µm microbeads with a coefficient of variation (CV) < 45 % were produced by exploring the Weber number (Wed) - Capillary number (Cac) emulsion generation space. These results show that sub-10 µm cellulose microbeads can be produced using isoporous polymer membranes fabricated via photolithography, for use in a wide range of applications in the personal care, food and drug industries.

Original languageEnglish
Article number100024
JournalJournal of Membrane Science Letters
Volume2
Issue number1
Early online date2 May 2022
DOIs
Publication statusPublished - 31 May 2022

Bibliographical note

Funding Information:
The authors wish to thank the UK Engineering and Physical Sciences Research Council for financial support (grant EP/P027490/1 ).

Keywords

  • cellulose microbeads
  • Isoporous membranes
  • membrane emulsification
  • photolithography
  • sustainable microparticles

ASJC Scopus subject areas

  • Filtration and Separation
  • Physical and Theoretical Chemistry
  • General Materials Science
  • Biochemistry

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