Production of crosslinked, hollow nanoparticles by surface-initiated living free-radical polymerization
Susanne Blomberg
IBM Almaden Research Center, 650 Harry Road, San Jose, California 95120-6099
Search for more papers by this authorSofia Ostberg
IBM Almaden Research Center, 650 Harry Road, San Jose, California 95120-6099
Search for more papers by this authorEva Harth
IBM Almaden Research Center, 650 Harry Road, San Jose, California 95120-6099
Search for more papers by this authorAnton W. Bosman
IBM Almaden Research Center, 650 Harry Road, San Jose, California 95120-6099
Search for more papers by this authorBrooke Van Horn
IBM Almaden Research Center, 650 Harry Road, San Jose, California 95120-6099
Search for more papers by this authorCorresponding Author
Craig J. Hawker
IBM Almaden Research Center, 650 Harry Road, San Jose, California 95120-6099
IBM Almaden Research Center, 650 Harry Road, San Jose, California 95120-6099Search for more papers by this authorSusanne Blomberg
IBM Almaden Research Center, 650 Harry Road, San Jose, California 95120-6099
Search for more papers by this authorSofia Ostberg
IBM Almaden Research Center, 650 Harry Road, San Jose, California 95120-6099
Search for more papers by this authorEva Harth
IBM Almaden Research Center, 650 Harry Road, San Jose, California 95120-6099
Search for more papers by this authorAnton W. Bosman
IBM Almaden Research Center, 650 Harry Road, San Jose, California 95120-6099
Search for more papers by this authorBrooke Van Horn
IBM Almaden Research Center, 650 Harry Road, San Jose, California 95120-6099
Search for more papers by this authorCorresponding Author
Craig J. Hawker
IBM Almaden Research Center, 650 Harry Road, San Jose, California 95120-6099
IBM Almaden Research Center, 650 Harry Road, San Jose, California 95120-6099Search for more papers by this authorAbstract
Surface-initiated living free-radical polymerization is employed in a multistep procedure to prepare hollow polymeric nanocapsules. Initially, trichlorosilyl-substituted alkoxyamine initiating groups are attached to the surface silanol groups of silica nanoparticles. This surface layer of initiating groups is then used to grow functionalized linear chains leading to a core–shell morphology. The choice of functional groups is governed by their ability to undergo facile crosslinking reactions, with both active ester and benzocyclobutene groups being examined. Under either chemical or thermal conditions, the reaction of these functionalities gives a crosslinked polymeric shell that is covalently attached to, and surrounds, the central silica core. Removal of the silica core with HF then gives the hollow polymeric nanocapsules, which are stable under solvent dissolution and thermal treatment because of their crosslinked structure. © 2002 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 40: 1309–1320, 2002
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Citing Literature
1 May 2002
Pages 1309-1320