Synthesis and characterisation of robust emulsion-templated silica microcapsules

Shane P. Meaney, Rico F. Tabor, Bart Follink

Research output: Contribution to journalArticleResearchpeer-review

8 Citations (Scopus)

Abstract

Robust silica microcapsules were synthesised using an emulsion template via a seeded growth strategy. Multiple additions of the silica precursor tetraethyl orthosilicate (TEOS) were observed to result in a number of physical and property changes of the capsule shells as compared to a single coating. Scanning electron microscopy indicated a morphological transition from a smooth to a roughened surface. Improved cargo retention and consolidation of the pore structure of the silica shells were observed using dye release experiments and nitrogen porosimetry respectively. In comparison to a typical hollow silica shell synthesis procedure, this one-pot loading and synthesis allows the simple production of robust capsules that are capable of sustained release, using mild conditions and reagents.

Original languageEnglish
Pages (from-to)664-672
Number of pages9
JournalJournal of Colloid and Interface Science
Volume505
DOIs
Publication statusPublished - 1 Nov 2017

Keywords

  • Capsules
  • Emulsion templating
  • Porosity
  • Silica synthesis

Cite this