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PNIPAAM Grafted Polymeric Monoliths Synthesized by the Reactive Gelation Process and their Swelling/Deswelling Characteristics |
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| Authors: | Vikas Mittal Nadejda B. Matsko Alessandro Butté Massimo Morbidelli |
| Affiliation: | 1. Department of Chemistry and Applied Biosciences, Institute of Chemical and Bioengineering, ETH Zurich, 8093 Zurich, Switzerland;2. Electron Microscopy Center ETH Zurich (EMEZ), Institute of Chemical and Bioengineering, ETH Zurich, 8093 Zurich, Switzerland |
| Abstract: | The production of macroporous monoliths functionalized with a thermo‐responsive polymer (PNIPAAM) is described. The surface functionalization was achieved by copolymerization of acrylic end capped atom transfer radical polymerization initiator (BPOEA) with divinylbenzene with or without styrene. Monoliths were generated by swelling them with styrene, BPOEA and divinylbenzene followed by gelation with salt and post polymerization. Subsequent grafting of these monoliths with PNIPAAM was achieved by atom transfer radical polymerization and their swelling deswelling characteristics quantified. The grafted monoliths provide a unique chromatographic stationary phase where adsorption/desorption can be driven by the use of temperature only.  |
| Keywords: | ATRP electron microscopy emulsion polymerization monolith polystyrene (PS) |