Thermoresponsive Vesicular Morphologies Obtained by Self-Assemblies of Hybrid Oligosaccharide-block-poly(N-isopropylacrylamide) Copolymer Systems

Issei Otsuka 1 Keita Fuchise 2 Sami Halila 1 Sébastien Fort 1 Karim Aissou 3, 4 Isabelle Pignot-Paintrand 1 Yougen Chen 2 Atsuchi Narumi 5 Toyoji Kakuchi 2 Redouane Borsali 1, *
* Auteur correspondant
1 CERMAV - Centre de recherches sur les macromolécules végétales
2 Hokkaido Univ, Grad Sch Engn
3 TEAM 4 LCPO
4 LCPO - Laboratoire de Chimie des Polymères Organiques
5 Yamagata Univ, Grad Sch Sci & Engn
Abstract : This work discusses the self-assembly properties of thermoresponsive hybrid oligosaccharide-block-poly(N-isopropylacrylamide) copolymer systems: maltoheptase-block-poly(N-isopropylacrylamide) (Mal(7)-b-PNIPAM(n)) copolymers. Those systems at different molar masses and volume fractions were synthesized Using Cu(I)-catalyzed 1,3-dipolar azide/alkyne cycloaddition, so-called "click" chemistry, between an alkynyl-functionalized maltoheptaose (I) and poly(N-isopropylacrylamide) having a terminal azido group (N(3)-PNIPAM(n)) prepared by atom transfer radical polymerization (ATRP). While the cloud point (T(cp)) of the N(3)-PNIPAM(n) ranged from 36.4 to 51.5 degrees C depending on the degree of polymerization, those obtained of the diblock copolymers ranged from 39.4 to 73.9 degrees C. The self-assembly of such systems is favored due to the hydrophobicity of the PNIPAM in water above the T(cp). While the N(3)-PNIPAM(n) present polydisperse globular shape with a mean diameter of 500 nm, well-defined vesicular morphologies with an approximate diameter of 300 nm are obtained in diblock copolymer systems. These results were obtained and confirmed using static and dynamic light scattering as well as imaging techniques such as transmission electron microscope experiments.
Keywords : WATER AMYLOSE VESICLES COIL BLOCK-COPOLYMERS TRANSFER RADICAL POLYMERIZATION DIBLOCK COPOLYMERS LIGHT-SCATTERING THERMAL RESPONSE POLY(N-ISOPROPYLACRYLAMIDE) CHAIN
Type de document :
Article dans une revue
Langmuir, American Chemical Society, 2010, 26 (4), pp.2325-2332. 〈10.1021/la902743y〉
Domaine :
Liste complète des métadonnées
https://hal.archives-ouvertes.fr/hal-00950666
Contributeur : Dominique Richard <>
Soumis le : vendredi 21 février 2014 - 17:52:37
Dernière modification le : mardi 27 novembre 2018 - 16:56:03

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CERMAV | UGA | INC-CNRS

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Issei Otsuka, Keita Fuchise, Sami Halila, Sébastien Fort, Karim Aissou, et al.. Thermoresponsive Vesicular Morphologies Obtained by Self-Assemblies of Hybrid Oligosaccharide-block-poly(N-isopropylacrylamide) Copolymer Systems. Langmuir, American Chemical Society, 2010, 26 (4), pp.2325-2332. 〈10.1021/la902743y〉. 〈hal-00950666〉

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