Reversible pH-dependent properties of multilayer microcapsules made of weak polyelectrolytes

Tatjana Mauser, Christophe Déjugnat, Gleb B. Sukhorukov

Research output: Contribution to journalArticlepeer-review

182 Citations (Scopus)

Abstract

We investigated microcapsules composed of the weak polyelectrolytes poly(allylamine hydrochloride) (PAH) and poly(methacrylic acid) (PMA) assembled on calcium carbonate cores. These capsules are stable in the pH range from 2.5 to 11.5, undergoing reversible swelling in the pH interval froin 2.7 to 2.6. Capsule swelling occurs at a protonation degree above 90%. The pH-dependent size variation of PAH/PMA capsules is blocked after crosslinking of the polyelectrolyte layers.

Original languageEnglish
Pages (from-to)1781-1785
Number of pages5
JournalMacromolecular Rapid Communications
Volume25
Issue number20
DOIs
Publication statusPublished - 22 Oct 2004
Externally publishedYes

Keywords

  • Crosslinking
  • Layer-by-layer
  • PH sensitivity
  • Stimuli-responsive
  • Swelling

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