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Poly(ethylene oxide)-poly(ethylene imine) block copolymers as templates and catalysts for the in situ formation of monodisperse silica nanospheres

Type of publication Peer-reviewed
Publikationsform Original article (peer-reviewed)
Publication date 2010
Author Kind L., Shkilnyy A., Schlaad H., Meier W., Taubert A.,
Project Nanostructured Polymers
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Original article (peer-reviewed)

Journal Colloid and Polymer Science
Volume (Issue) 288(16-17)
Page(s) 1645 - 1650
Title of proceedings Colloid and Polymer Science
DOI 10.1007/s00396-010-2286-7

Abstract

Block copolymers based on poly(ethylene oxide) (PEO) and poly(ethylene imine) (PEI) are efficient catalysts/templates for the formation of uniform silica nanoparticles. Addition of tetraethylorthosilicate to a solution of PEO-PEI or PEI-PEO-PEI block copolymers results in the formation of silica particles with a diameter of ca. 30 nm and narrow size distribution. The particles precipitated with the diblock copolymers can be redispersed in water after isolation as individual nanoparticles. Evidently, block copolymers based on PEO and PEI serve as excellent templates for the biomimetic and "soft" synthesis of silica nanoparticles.
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