In Situ Synthesis of Temperature-Sensitive Hollow Microspheres via Interfacial Polymerization

In this communication, a novel one-pot synthetic strategy for preparing hollow PNIPAM microspheres via an interfacial polymerization approach at the interface of an inverse W/O emulsion has been proposed and demonstrated. The results show that the prepared PNIPAM microspheres have real empty core an...

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Bibliographic Details
Published in:Journal of the American Chemical Society 2005-06, Vol.127 (23), p.8274-8275
Main Authors: Sun, Qunhui, Deng, Yulin
Format: Article
Language:English
Subjects:
Acrylic Resins - chemical synthesis
Acrylic Resins - chemistry
Applied sciences
Exact sciences and technology
Microscopy, Electron, Scanning
Microspheres
Organic polymers
Physicochemistry of polymers
Polymers with particular structures
Preparation, kinetics, thermodynamics, mechanism and catalysts
Temperature
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Summary:In this communication, a novel one-pot synthetic strategy for preparing hollow PNIPAM microspheres via an interfacial polymerization approach at the interface of an inverse W/O emulsion has been proposed and demonstrated. The results show that the prepared PNIPAM microspheres have real empty core and polymer shell structure, with a size range of 1−3 μm. The hollow microspheres experienced a reversible swelling and deswelling process by mediating the temperature below and above the lower critical solution temperature (LCST) of the PNIPAM. The new approach not only provided a unique technical pathway to prepare hollow PNIPAM microspheres in situ under mild reaction conditions but also opened a platform for helping to understand the mechanism of diffusion, migration of the PNIPAM at an oil/water interface above its LCST, and the polymer layer formation mechanism as well.
ISSN:0002-7863
1520-5126
DOI:10.1021/ja051487k