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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, JMJThe 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
MacromoleculesVolume
36Issue
5Pagination
1677-1684ISSN
0024-9297Department/School
School of Natural SciencesPublisher
American Chemical SocietyPlace of publication
WashingtonRights statement
© 2003 American Chemical SocietyRepository Status
- Restricted