Composite tectocapsules via the self-assembly of functionalized poly(divinylbenzene) microspheres
L. M. Croll and H. D. H. St�ver
Department of Chemistry, McMaster University, Hamilton,
Ontario L8S 4M1, Canada
Abstract: Poly(divinylbenzene-55)[poly(DVB-55] microspheres
were used as building blocks to form polymer capsule walls consisting
of interconnected microspheres. The microspheres had to be surface-functionalized
with maleic acid to facilitate their interfacial assembly. In addition,
porous and functionalized poly(DVB-55) microspheres were embedded across
interfacial polyurea capsule membranes to form composite tectocapsules
where release of core materials is designed to occur through the microsphere
pores, rather than by conventional wall diffusion. Electron microscopy
and X-ray spectromicroscopy were used to characterize the wall compositions,
and release data are presented to illustrate the role of microspheres
acting as release portals.
*Lecture presented at the symposium "Controlling the self assembly in macromolecular systems: From nature to chemistry to functional properties", as part of the 39th IUPAC Congress and 86th Conference of the Canadian Society for Chemistry: Chemistry at the Interfaces, Ottawa, Canada, 10-15 August 2003. Other Congress presentations are published in this issue, pp. 1295-1603.
Page last modified 15 September 2004.
Copyright © 2004 International Union of Pure and Applied Chemistry.
Questions or comments about IUPAC, please contact, the Secretariat.
Questions regarding the website, please contact web
manager.
