Issue 9, 2008
From the journal:

Soft Matter

Multiblock copolymer behaviour of α-CD/PEO-based polyrotaxanes: towards nano-cylinder self-organization of α-CDs

Christophe Travelet,a   Guy Schlatter,*a   Pascal Hébraud,b   Cyril Brochon,a   Alain Lapp,c   Denis V. Anokhin,d   Dimitri A. Ivanov,d   Cédric Gaillarde  and  Georges Hadziioannou*a  

* Corresponding authors

a Laboratoire d'Ingénierie des Polymères pour les Hautes Technologies, CNRS UMR 7165, Ecole Européenne de Chimie, Polymères et Matériaux, Université Louis Pasteur, 25 rue Becquerel, 67087 Strasbourg cedex 2, France
E-mail: Guy.Schlatter@ecpm.u-strasbg.fr, Hadzii@ecpm.u-strasbg.fr
Fax: +33 (0)3 90 24 27 16
Tel: +33 (0)3 90 24 27 03

b Institut de Physique et Chimie des Matériaux de Strasbourg, Université Louis Pasteur, CNRS UMR 7504, 23 rue du Loess, BP 43, 67034 Strasbourg cedex 2, France

c Laboratoire Léon Brillouin, CEA Saclay, 91191 Gif-sur-Yvette cedex, France

d Institut de Chimie des Surfaces et Interfaces, CNRS UPR 9069, 15 rue Jean Starcky, BP 2488, 68057 Mulhouse cedex, France

e Institut National de la Recherche Agronomique, Unité de Recherche Biopolymères, Interactions et Assemblages, Plate-Forme Biopolymères, Interactions et Biologie Structurale, rue de la Géraudière, BP 71627, 44316 Nantes cedex 3, France

Abstract

The present work demonstrates that α-cyclodextrin/poly(ethylene oxide) (α-CD/PEO)-based polyrotaxanes (PRs) behave as multiblock copolymers. One block type consists of a rod-like tube made of 6 to 7 weakly stacked α-CDs threaded along the PEO chain. The other one is made of a naked PEO segment, i.e. the PR part that is not covered by α-CDs. This multiblock behaviour induces the self-organization of PRs in concentrated solution in dimethyl sulfoxide (DMSO) at room temperature leading to the formation of nano-cylinders. These nano-cylinders consist of assemblies of roughly 60 α-CD rod-like tubes through hydrogen bonding. Moreover, crystallites of naked PEO segments are formed since PEO is in poor solvent conditions (DMSO) at room temperature. Furthermore, the formation of α-CD nano-cylinders as well as of naked PEO segment crystallites leads to physical gelation of PRs in DMSO.

Graphical abstract: Multiblock copolymer behaviour of α-CD/PEO-based polyrotaxanes: towards nano-cylinder self-organization of α-CDs

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Article information

DOI
https://doi.org/10.1039/B806656F
Article type
Paper
Submitted
21 Apr 2008
Accepted
28 May 2008
First published
08 Jul 2008

Soft Matter, 2008,4, 1855-1860

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Multiblock copolymer behaviour of α-CD/PEO-based polyrotaxanes: towards nano-cylinder self-organization of α-CDs

C. Travelet, G. Schlatter, P. Hébraud, C. Brochon, A. Lapp, D. V. Anokhin, D. A. Ivanov, C. Gaillard and G. Hadziioannou, Soft Matter, 2008, 4, 1855 DOI: 10.1039/B806656F

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