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Advisor(s)
Abstract(s)
Experimental and theoretical tools to describe and tailor polymer network formation
processes are here addressed. Although a special emphasis is given to the
synthesis, characterization, and applications of smart and superabsorbent polymers,
other networks with higher cross-linker contents are also prospected. Purely
synthetic and cellulose-based hydrogels are both considered in this research. The
reactor type (e.g., batch or continuous flow micro-reactor), polymerization process
(e.g., bulk, inverse suspension, or precipitation polymerization), and polymerization
mechanism (e.g., classic free radical polymerization or reversible
deactivation radical polymerization RDRP) are highlighted as possible tools to
change the morphology and the molecular architecture of polymer networks and
hydrogels. The tailoring of cellulose-synthetic hybrid materials is also addressed
through the use of RAFT-mediated polymer grafting. Case studies showing the
applications of the synthesized materials are presented, namely, molecularly
imprinted hydrogel particles for retention of aminopyridines, molecularly
imprinted polymers for polyphenols, caffeine or 5-fluorouracil selective uptake/
release, as well as modified cellulose adsorbents for polyphenol retention.
Cellulose-based hydrogels are also considered as possible vehicles for
polyphenol-controlled release. The mechanisms of liberation of polyphenols
from these materials are analyzed, namely, when supercritical CO2 is used in
the hydrogel impregnation process
Description
Keywords
Polymer networks Hydrogels Cellulose Modeling RAFT polymerization Molecular imprinting Controlled release
Pedagogical Context
Citation
Gomes, Catarina P.; Dias, Rolando; Costa, Mário Rui (2018). Polymer reaction engineering tools to tailor smart and superabsorbent hydrogels. In Ed. Mondal M. Cellulose-Based Superabsorbent Hydrogels. [S.l.]: Springer. p. 1-63. ISBN 978-3-319-76573-0
Publisher
Springer