A Novel Route to Multiphase Polymer Systems Containing Nano-Droplets: Radical Polymerization of Vinylic Monomers in Gelled Water-in-Oil Miniemulsions
✍ Scribed by Christian Holtze; Katharina Landfester; Markus Antonietti
- Publisher
- John Wiley and Sons
- Year
- 2005
- Tongue
- English
- Weight
- 137 KB
- Volume
- 290
- Category
- Article
- ISSN
- 1438-7492
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✦ Synopsis
Abstract
Summary: A new strategy for the synthesis of composite polymers with larger volume fraction of aqueous inclusions less than 1 µm in diameter is presented. A water‐in‐oil miniemulsion of aqueous droplets in a continuous, cross‐linkable monomer phase is prepared. The addition of an organo‐gelator allows the immobilization of the droplets in a solid gel, thus avoiding the usual demixing upon polymerization of the continuous phase. This pregelled system is then converted into a composite polymer by photoinitiated free radical polymerization. Such coatings may be used for an improved climate control of buildings or as a deposit for the controlled release of actives from polar nano‐droplets.
SEM image of a cross‐linked composite polymer showing controlled droplet inclusions with a maximal diameter of 500 nm.
magnified imageSEM image of a cross‐linked composite polymer showing controlled droplet inclusions with a maximal diameter of 500 nm.