Hollow microspheres with binary colloidal and polymeric membrane: Effect of polymer and particle concentrations

Cayre, Olivier J. and Biggs, Simon (2010) Hollow microspheres with binary colloidal and polymeric membrane: Effect of polymer and particle concentrations. Advanced Powder Technology, 21 1: 19-22. doi:10.1016/j.apt.2009.08.005


Author Cayre, Olivier J.
Biggs, Simon
Title Hollow microspheres with binary colloidal and polymeric membrane: Effect of polymer and particle concentrations
Journal name Advanced Powder Technology   Check publisher's open access policy
ISSN 0921-8831
1568-5527
Publication date 2010-01-01
Year available 2010
Sub-type Article (original research)
DOI 10.1016/j.apt.2009.08.005
Volume 21
Issue 1
Start page 19
End page 22
Total pages 4
Place of publication Amsterdam, The Netherlands
Publisher Elsevier BV
Collection year 2011
Language eng
Subject 1500 Chemical Engineering
2211 Mechanics of Materials
Abstract We report here the preparation of hollow microspheres with a binary shell structure consisting of a precipitated polymer film with a layer of colloidal particles embedded on its outer surface. We recently demonstrated a method for the preparation of microspheres from solid-stabilised emulsion templates using various colloidal particle systems as emulsifiers. In the present work we use colloidal silica as an emulsifier for the preparation of the emulsion template for the microspheres and study the effect of polymer and particle concentrations on the obtained structures. Observations using optical microscopy showed that decreasing the polymer concentration led to a reduction in the capsule wall thickness and apparent strength of the microspheres when dried. Importantly, all microspheres preserved their integrity when in suspension. SEM studies confirmed the differences observed in the thickness of the precipitated film at the oil/water interface. In addition, we also demonstrate that a larger particle concentration leads to microspheres with a lower degree of porosity.
Keyword Hollow microspheres
Polymer precipitation
Porous polymer shell
Solid-stabilised emulsion templates
Solvent extraction
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: Faculty of Engineering, Architecture and Information Technology Publications
 
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