Nano-objets hybrides et polymères sous irradiation

Abstract : Hybrid and polymer nano-objects have known a growing interest these last years but few are studied under irradiation. In the present work, different nano-objects have been synthetized and studied to understand their stability towards ionizing rays. We have studied the effect of irradiation onto amphiphilic bloc copolymer that form micelles in water. Objects were varied by the nature of their hydrophobic bloc and their sensibility to ionizing rays. First, methacrylates were copolymerized by ATRP with a PEG macro-initiator. Secondly, to improve radiation effect, a more radiosensitive polymer, a polyolefinsulfone, was synthetized by a thiol-ene polyaddition. After nanoprecipitation, objects were caracterized before and after irradiation by scattering and chromatography techniques. In parallel we also studied metallic nanoparticles well known for improving irradiation effect. Polymer-grafted gold nanoparticles were synthetized via a “grafting to” technique, after the synthesis of macro-ligands by controlled radical polymerization. After a precise characterization of these objects, irradiation effect has been studied via changes in size and polymer mass. This will permit to determine the nature of induced phenomena.
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  • HAL Id : tel-01444882, version 1

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Aurélie Paquirissamy. Nano-objets hybrides et polymères sous irradiation. Chimie inorganique. Université Paris-Saclay, 2016. Français. ⟨NNT : 2016SACLS390⟩. ⟨tel-01444882⟩

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