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Photografting and the Control of Surface Chemistry in Three-Dimensional Porous Polymer Monoliths

journal contribution
posted on 2023-05-16, 16:14 authored by Rohr, T, Emily HilderEmily Hilder, Donovan, JJ, Svec, F, Frechet, JMJ
The photografting of porous three-dimensional materials has been achieved using a benzophenone-initiated surface photopolymerization within the pores of a macroporous polymer monolith contained in a fused silica capillary. Despite the relatively high thickness (100 ìm or more) of the layer of material involved, the photografting process occurs efficiently throughout its cross section as confirmed by electron probe microanalysis. In addition, the use of photomasks during grafting enables the precise placement of specific functionalities in selected and predetermined areas of a single monolith for use in a variety of applications ranging from supported catalysis to microfluidics. For example, we have demonstrated the fast and selective incorporation of chains of poly(2-acrylamido-2-methyl-1-propanesulfonic acid) into the irradiated areas of pores of a 100 ìm thick monolith and monitored the extent of grafting through measurements of the electroosmotic flow afforded by the newly introduced ionized functionalities. Grafting of the porous polymer with 4,4-dimethyl-2-vinylazlactone was also successful and could be monitored visually by fluorescence measurements following fluorescent labeling of the grafted chains with Rhodamine 6G.

History

Publication title

Macromolecules

Volume

36

Issue

5

Pagination

1677-1684

ISSN

0024-9297

Department/School

School of Natural Sciences

Publisher

American Chemical Society

Place of publication

Washington

Rights statement

© 2003 American Chemical Society

Repository Status

  • Restricted

Socio-economic Objectives

Expanding knowledge in the chemical sciences

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