Reversible pH‐Dependent Properties of Multilayer Microcapsules Made of Weak Polyelectrolytes | Zendy

Mauser Tatjana | Zendy; Déjugnat Christophe | Zendy; Sukhorukov Gleb B. | Zendy

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Reversible pH‐Dependent Properties of Multilayer Microcapsules Made of Weak Polyelectrolytes

Author(s) -

Mauser Tatjana,

Déjugnat Christophe,

Sukhorukov Gleb B.

Publication year - 2004

Publication title -

macromolecular rapid communications

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.348

H-Index - 154

eISSN - 1521-3927

pISSN - 1022-1336

DOI - 10.1002/marc.200400331

Subject(s) - swelling , polyelectrolyte , allylamine , methacrylic acid , protonation , polymer chemistry , chemical engineering , hydrochloride , chemistry , materials science , polymer , copolymer , organic chemistry , composite material , ion , engineering

Summary: 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 from 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.Schematic of the swelling and de‐swelling of the capsules with changing pH.

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