Amphiphilic photosensitive dextran-g-poly(o-nitrobenzyl acrylate) glycopolymers

Abstract : Among all photosensitive monomers reported in the literature, o-nitrobenzyl acrylate (NBA) was selected in this present study. Two strategies were compared to produce azido-terminated poly(o-nitrobenzyl acrylate) (PNBA) using controlled Single Electron Transfer-Living Radical Polymerization (SET-LRP). In a parallel way, dextran (Dex) was modified by the introduction of several alkynyl-terminated hydrophobic chains. Finally, an Huisgen-type Copper (I)-catalyzed Azide-Alkyne Cycloaddition (CuAAC) click-chemistry was carried out to produce amphiphilic Dex-g-PNBA glycopolymers with different number and length of PNBA grafts. 2D DOSY H-1 NMR was used to prove the formation of such glycopolymers. Preliminary study on Dex-g-PNBA self-assembly was done by measuring the critical water content (CWC) above which Dex-g-PNBA started to auto-organize themselves to produce nano-objects. Finally, under UV irradiation, PNBA grafts turn into poly(acrylic acid) ones giving light-sensitive properties to such amphiphilic Dex-g-PNBA. Such properties were evaluated and compared with those of PNBA.
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Carbohydrate Polymers, Elsevier, 2016, 136, pp.598-608. 〈10.1016/j.carbpol.2015.09.061〉
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https://hal.univ-lorraine.fr/hal-01497717
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Soumis le : mercredi 29 mars 2017 - 10:46:29
Dernière modification le : mardi 24 juillet 2018 - 16:43:01

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Mehawed Soliman, Ludovic Colombeau, Cécile Nouvel, Jérôme Babin, Jean-Luc Six. Amphiphilic photosensitive dextran-g-poly(o-nitrobenzyl acrylate) glycopolymers. Carbohydrate Polymers, Elsevier, 2016, 136, pp.598-608. 〈10.1016/j.carbpol.2015.09.061〉. 〈hal-01497717〉

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