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
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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