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Issue 44, 2008
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Peripherally decorated binary microcapsules containing two liquids

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In this work, ∼1.4 µm dibutylphthalate (DBP) filled ureaformaldehyde (UF) microcapsules were used as Pickering stabilizers to create larger ∼140 µm microcapsules containing a second liquid phase, dicyclopentadiene (DCPD). The binary microcapsules were made by encapsulating the dispersed DCPD liquid (stabilized with the UF(DBP) microcapsules in water) via an isocyanate–alcohol interfacial polymerization reaction. Fluorescent optical microscopy and scanning electron microscopy (SEM) showed that the resulting microcapsules have a central liquid core decorated at its periphery with a layer of microcapsules containing the second liquid. The presence of both the encapsulated liquids within a single capsule structure was demonstrated by differential scanning calorimetry (DSC). DSC data analysis indicated a DBP volume fraction of 8.8%. This value was validated by the calculated theoretical fraction on the basis of the observed architecture and capsule dimensions.

Graphical abstract: Peripherally decorated binary microcapsules containing two liquids

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Publication details

The article was received on 26 Jun 2008, accepted on 10 Sep 2008 and first published on 09 Oct 2008

Article type: Paper
DOI: 10.1039/B810542A
Citation: J. Mater. Chem., 2008,18, 5390-5394
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    Peripherally decorated binary microcapsules containing two liquids

    S. D. Mookhoek, B. J. Blaiszik, H. R. Fischer, N. R. Sottos, S. R. White and S. van der Zwaag, J. Mater. Chem., 2008, 18, 5390
    DOI: 10.1039/B810542A

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