Issue 6, 2008
From the journal:

Soft Matter

pH-Switchable supramolecular “sliding” gels based on polyrotaxanes of polyethyleneimine-block-poly(ethylene oxide)-block-polyethyleneimine block copolymer and α-cyclodextrin: synthesis and swelling behaviour

Khaled Karaky,a   Cyril Brochon,*a   Guy Schlattera  and  Georges Hadziioannou*a  

* Corresponding authors

a Laboratoire d'Ingénierie des Polymères pour les Hautes Technologies, CNRS UMR 7165, Université Louis Pasteur, ECPM, 25, rue Becquerel, 67087 Strasbourg Cedex 2, France
E-mail: cyril.brochon@ecpm.u-strasbg.fr, Hadzii@ecpm.u-strasbg.fr
Fax: +33-3-90242716
Tel: +33-3-90242719

Abstract

A new type of pH-switchable supramolecular sliding gel has been synthesized, based on polyrotaxanes of polyethyleneimine-block-poly(ethylene oxide)-block-polyethyleneimine block copolymer and α-cyclodextrin. The three dimensional supramolecular network was obtained by an inter-molecular crosslinking reaction between CDs belonging to two different polyrotaxanes via1,1′-carbonyldiimidazole. Higher gel equilibrium swelling has been observed in acidic medium than in basic medium. This behaviour is explained by the ionization of EI units leading to electrostatic repulsion of the PEI blocks.

Graphical abstract: pH-Switchable supramolecular “sliding” gels based on polyrotaxanes of polyethyleneimine-block-poly(ethylene oxide)-block-polyethyleneimine block copolymer and α-cyclodextrin: synthesis and swelling behaviour

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Article information

DOI
https://doi.org/10.1039/B803670E
Article type
Communication
Submitted
04 Mar 2008
Accepted
28 Mar 2008
First published
22 Apr 2008

Soft Matter, 2008,4, 1165-1168

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pH-Switchable supramolecular “sliding” gels based on polyrotaxanes of polyethyleneimine-block-poly(ethylene oxide)-block-polyethyleneimine block copolymer and α-cyclodextrin: synthesis and swelling behaviour

K. Karaky, C. Brochon, G. Schlatter and G. Hadziioannou, Soft Matter, 2008, 4, 1165 DOI: 10.1039/B803670E

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