Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 54, Issue 18, Pages 5383-5388Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201410570
Keywords
hydrogels; nanocellulose; nanocomposites; supramolecular chemistry
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Funding
- European Research Council Starting Investigator Grant (ASPiRe) [ERC-2009-StG-240629]
- Engineering and Physical Sciences Research Council [EP/F035535/1]
- ERC [ERC 2011-ADG 291 364]
- EPSRC
- Academy of Finland Center of Excellence of Molecular Engineering of Biosynthetic Hybrid Materials Research
- Department of Higher Education, Ministry of Education of Malaysia and the Universiti Teknologi MARA (UiTM) of Malaysia
- EPSRC [EP/F035535/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [981712, EP/F035535/1] Funding Source: researchfish
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Hybrid nanocomposites were constructed based on colloidal nanofibrillar hydrogels with interpenetrating supramolecular hydrogels, displaying enhanced rheological yield strain and a synergistic improvement in storage modulus. The supramolecular hydrogel consists of naphthyl-functionalized hydroxyethyl cellulose and a cationic polystyrene derivative decorated with methylviologen moieties, physically crosslinked with cucurbit[8]uril macrocyclic hosts. Fast exchange kinetics within the supramolecular system are enabled by reversible cross-linking through the binding of the naphthyl and viologen guests. The colloidal hydrogel consists of nanofibrillated cellulose that combines a mechanically strong nanofiber skeleton with a lateral fibrillar diameter of a few nanometers. The two networks interact through hydroxyethyl cellulose adsorption to the nanofibrillated cellulose surfaces. This work shows methods to bridge the length scales of molecular and colloidal hybrid hydrogels, resulting in synergy between reinforcement and dynamics.
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