Issue 44, 2008
From the journal:

Journal of Materials Chemistry

Peripherally decorated binary microcapsules containing two liquids†

Steven D. Mookhoek,*ab   Benjamin J. Blaiszik,cd   Hartmut R. Fischer,e   Nancy R. Sottos,cf   Scott R. Whitecg  and  Sybrand van der Zwaaga  

* Corresponding authors

a Faculty of Aerospace Engineering, Delft University of Technology, Kluyverweg 1, 2629 HS Delft, The Netherlands

b Dutch Polymer Institute (DPI), P.O. Box 902, 5600 AX Eindhoven, The Netherlands
E-mail: s.d.mookhoek@tudelft.nl

c Beckman Institute, University of Illinois at Urbana-Champaign, 405 N. Mathews Ave., Urbana, USA

d Department of Mechanical Science and Engineering, University of Illinois at Urbana-Champaign, 1206 W. Green St., Urbana, USA

e Department of Materials Performance, TNO Science & Industry, De Rondom 1, 5612 AP Eindhoven, The Netherlands

f Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, 1304 W. Green St., Urbana, USA

g Department of Aerospace Engineering, University of Illinois at Urbana-Champaign, 104 S. Wright St., Urbana, USA

Abstract

In this work, ∼1.4 µm dibutylphthalate (DBP) filled urea–formaldehyde (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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Article information

DOI
https://doi.org/10.1039/B810542A
Article type
Paper
Submitted
26 Jun 2008
Accepted
10 Sep 2008
First published
09 Oct 2008

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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