Supramolecular polymer networks based on cucurbit[8]uril host–guest interactions as aqueous photo-rheological fluids
Literature Information
Publication Date
2015-08-11
DOI
10.1039/C5PY01115A
Impact Factor
5.582
Authors
Ji Liu, Oren A. Scherman
View Original
Abstract
We describe a low-mass fraction (≤0.75 wt%) supramolecular polymer network as an aqueous photo-rheological fluid (PRF) whose rheological properties can be easily modulated via light irradiation. This supramolecular polymer network is formed via CB[8]-assisted host–guest interactions between naphthyl-functionalised hydroxyethyl cellulose (HEC-Np), methyl viologen containing styrene copolymer (PSTMV), cucurbit[8]uril (CB[8]) and a photoisomerisable azobenzene imidazolium (AzoIm) derivative. This cellulose-based PRF can undergo a UV-triggered rapid transition from a highly viscous and rigid gel into a Newtonian-like fluid, with a decrease in zero-shear viscosity of over two orders of magnitude. Moreover, the rate of viscosity reduction of these PRFs can be tuned based on the mixture composition and duration of photoirradiation.
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Source Journal
Polymer Chemistry
CiteScore:
8.6
Self-citation Rate:
7.3%
Articles per Year:
457
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