Synthesis of New Dendritic Polymeric Adsorbents for Trapping Radioactive Radon

Abstract : Radon is a radioactive Noble gas naturally occurring in air. The most important isotope of this gas is 222Rn, which comes from a 238U decay. 222Rn contributes to most of the natural radioactivity. In particle physics experiments, radon is a principal source of background noise during measurements. It is also the second cause of lungs cancer in the world.1,2 To control 222Rn pollution, activated charcoals are already used as adsorbents, but various types exist, and each one has a wide range of efficiency.3 Furthermore, they are not of a high purity and homogeneity. More importantly, they show some traces of radioactivity (238U, 40K, ...), plus a diffusion of encapsulated radon. One solution to avoid these radioactive contaminants is to make fully organic absorbents, to limit radioactive impurities. Inorganic materials and zeolites are in general not appropriate in this regard. Thus, we are working on new dendritic monomers and polymers, as new entities possessing a covalent pre-organization of cavities toward nanoporous materials, after a potent cross-linkage. Some sulfurated asterisk monomers are quite easy to make (2 to 4 high-yielding steps).4 These monomers were thus polymerized to some extent by radical polymerization, and they will be cross-linked in the future to allow a new avenue for optimized adsorption and chemisorption properties.
Type de document :
Communication dans un congrès
8e Rencontre de Chimie Organique de Marseille, Jun 2014, Marseille, France
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http://hal.in2p3.fr/in2p3-01071222
Contributeur : Danielle Cristofol <>
Soumis le : vendredi 3 octobre 2014 - 14:14:10
Dernière modification le : jeudi 18 janvier 2018 - 02:25:23

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  • HAL Id : in2p3-01071222, version 1

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R. Noel, M. Roy, P. Trang, D. Gigmes, J. Busto, et al.. Synthesis of New Dendritic Polymeric Adsorbents for Trapping Radioactive Radon. 8e Rencontre de Chimie Organique de Marseille, Jun 2014, Marseille, France. 〈in2p3-01071222〉

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