UV-Cross-linkable multilayer microcapsules made of weak polyelectrolytes

Qiangying Yi, Dongsheng Wen, Gleb B. Sukhorukov

Research output: Contribution to journalArticlepeer-review

29 Citations (Scopus)

Abstract

Microcapsules composed of weak polyelectrolytes modified with UV-responsive benzophenone (BP) groups were fabricated by the layer-by-layer (LbL) technique. Being exposed to UV lights, capsules shrunk in the time course of minutes at irradiation intensity of 5 mW/cm2. The shrinkage adjusted the capsule permeability, providing a novel way to encapsulate fluorescence-labeled dextran molecules without heating. Cross-linking within the capsule shells based on hydrogen abstraction via excited benzophenone units by UV showed a reliable and swift approach to tighten and stabilize the capsule shell without losing the pH-responsive properties of the weak polyelectrolyte multilayers.

Original languageEnglish
Pages (from-to)10822-10829
Number of pages8
JournalLangmuir
Volume28
Issue number29
DOIs
Publication statusPublished - 24 Jul 2012
Externally publishedYes

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