Peripherally decorated binary microcapsules containing two liquids
article
In this work, ∼1.4 m dibutylphthalate (DBP) filled urea-formaldehyde (UF) microcapsules were used as Pickering stabilizers to create larger ∼140 m 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.
Topics
TNO Identifier
241115
DOI
https://dx.doi.org/10.1039/b810542a
ISSN
09599428
Source
Journal of Materials Chemistry, 18(44), pp. 5390-5394.
Publisher
Royal Society of Chemistry RSC
Collation
5 p.
Pages
5390-5394
Files
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