Repository logo

Infoscience

  • English
  • French
Log In
Logo EPFL, École polytechnique fédérale de Lausanne

Infoscience

  • English
  • French
Log In
  1. Home
  2. Academic and Research Output
  3. Journal articles
  4. Porous granules by freeze granulation of Pickering emulsions stabilized with halloysite particles
 
research article

Porous granules by freeze granulation of Pickering emulsions stabilized with halloysite particles

Ouadaker, M.
•
Jiang, X.
•
Bowen, P.  
Show more
January 20, 2020
Colloids And Surfaces A-Physicochemical And Engineering Aspects

Pickering emulsions stabilized with a natural silicate mineral, halloysite, were dried by freeze granulation in order to prepare porous granules. Different formulations were studied, by varying the pH of the suspension, the ionic strength and with the addition of organic binders (poly(vinyl alcohol) (PVA) and poly(ethylene glycol) (PEG)). To get a better understanding and control on the process, the objective was to correlate the formulation and the emulsion behavior to the morphology and size of the granules. This study highlights the predominant role of electrostatic interactions on the emulsions. Their stability is improved if the dispersion of solid particles in the continuous phase is relatively limited, with medium zeta potential absolute values. Freeze granulation of emulsions prepared at different ionic strength and pH led to similar granules, with an internal porosity attributed to the low solid fraction. The addition of organic additives PVA and PEG led to a better conservation of the structure, with fewer broken fragments and a larger porosity, attributed to a higher cohesion of these emulsions during the spray freezing and the lyophilisation steps.

  • Details
  • Metrics
Type
research article
DOI
10.1016/j.colsurfa.2019.124156
Web of Science ID

WOS:000502046200080

Author(s)
Ouadaker, M.
Jiang, X.
Bowen, P.  
Bienia, M.
Pagnoux, C.
Aimable, A.
Date Issued

2020-01-20

Publisher

ELSEVIER

Published in
Colloids And Surfaces A-Physicochemical And Engineering Aspects
Volume

585

Article Number

124156

Subjects

Chemistry, Physical

•

Chemistry

•

pickering emulsion

•

freeze granulation

•

lyophilisation

•

halloysite

•

porosity

•

rheology

•

colloidal stabilizers

•

macroporous ceramics

•

wettability

•

surfactants

•

suspensions

•

smectites

•

solids

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LMC  
Available on Infoscience
March 3, 2020
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/166767
Logo EPFL, École polytechnique fédérale de Lausanne
  • Contact
  • infoscience@epfl.ch

  • Follow us on Facebook
  • Follow us on Instagram
  • Follow us on LinkedIn
  • Follow us on X
  • Follow us on Youtube
AccessibilityLegal noticePrivacy policyCookie settingsEnd User AgreementGet helpFeedback

Infoscience is a service managed and provided by the Library and IT Services of EPFL. © EPFL, tous droits réservés