Pseudopolyrotaxanes on Inorganic Nanoplatelets and their Supramolecular Hydrogels

Pseudopolyrotaxanes on Inorganic Nanoplatelets and their Supramolecular Hydrogels

In this paper, we demonstrate the first hybrid suprastructure of pseudopolyrotaxanes (PPRs) on clay nanoplatelets. Simple end-modification of poly(ethylene glycol) with pyridinium (PEG-N + ) enabled the chains to form brushlike conformation on clay surfaces. Thus, the PEG chains were able to thread...

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Veröffentlicht in:Langmuir 2011-10, Vol.27 (20), p.12650-12656
Hauptverfasser: Liao, Xiaojuan, Chen, Guosong, Jiang, Ming
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Sprache:eng
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Chemistry
Colloidal gels. Colloidal sols
Colloidal state and disperse state
Exact sciences and technology
General and physical chemistry
Materials: Nano-and Mesostructured Materials, Polymers, Gels, Liquid Crystals, Composites
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Chen, Guosong
Jiang, Ming
description In this paper, we demonstrate the first hybrid suprastructure of pseudopolyrotaxanes (PPRs) on clay nanoplatelets. Simple end-modification of poly(ethylene glycol) with pyridinium (PEG-N + ) enabled the chains to form brushlike conformation on clay surfaces. Thus, the PEG chains were able to thread into the cavities of α-cyclodextrins (α-CDs), leading to hybrid PPR hydrogels. This was very different from the unmodified PEG chains, which were absorbed onto the clay surface and thus made the PPR formation impossible. The hydrogels made of this PPR-on-clay structure displayed a dynamic modulus 1 order of magnitude higher than those of the native PPR hydrogels. Furthermore, based on the competitive host–guest interactions, such hybrid hydrogels showed fully photoreversible sol–gel transition after a competitive guest containing azobenzene moiety was introduced.
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Colloidal gels. Colloidal sols
Colloidal state and disperse state
Exact sciences and technology
General and physical chemistry
Materials: Nano-and Mesostructured Materials, Polymers, Gels, Liquid Crystals, Composites
title Pseudopolyrotaxanes on Inorganic Nanoplatelets and their Supramolecular Hydrogels
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