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Poster (Scientific congresses and symposiums)
Carbon dioxide, a cheap bio-sourced building block for cyclic carbonates and non-isocyanate polyurethanes
Gennen, Sandro; Alves, Margot; Tassaing, Thierry et al.
2015International Symposium on Green Chemistry (ISGC)
 

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Keywords :
supercritical carbon dioxide; cyclic carbonate; polyurethane; carbon dioxide
Abstract :
[en] Due to concerns about global warming combined with the decrease of fossil resources, new carbon feedstocks that are abundant, renewable, non-toxic, inexpensive and environmentally friendly must be explored to produce chemicals. Besides the valorization of bio-based raw materials, the chemical transformation of carbon dioxide into added-value products has gained interest in both academia and industry. To date, the chemical fixation of CO2 onto epoxides with the formation of cyclic carbonates is one of the most promising ways to valorize CO2 at an industrial scale. Indeed, cyclic carbonates find applications as electrolytes in lithium ion batteries, as aprotic polar solvents or as useful intermediates for polycarbonates. Cyclic carbonates also react with primary amines to produce 2-hydroxyethylurethane. This reaction can be extrapolated to the synthesis of non-isocyanate polyurethanes (NIPU) by polyaddition of bifunctional cyclic carbonates with diamines.5 This study aims (i) at developing a new highly efficient organocatalyst for the synthesis of cyclic carbonates under mild experimental conditions and (ii) their valorization as monomers to produce non-isocyanate polyurethanes. First, we have identified a bicomponent organocatalyst, composed of a judicious combination of an organocatalyst and an activator, for the very fast synthesis of cyclic carbonates from CO2 and epoxides under very mild reaction conditions. Kinetics of reactions were followed by online Raman spectroscopy measurements under pressure. NMR titrations were realized to evidence the mechanism of activation of this novel organocatalytic system that will be discussed in detail in this talk. The second objective relies on the development of new efficient organocatalysts for the synthesis of high molar masses NIPUs in short reaction times. Organic compounds interacting with the cyclic carbonate by hydrogen bonding were identified and their catalytic activity was demonstrated for model compounds.
Research center :
Center for Education and Research on Macromolecules (CERM)
Disciplines :
Materials science & engineering
Chemistry
Author, co-author :
Gennen, Sandro ;  University of Liège - ULiège > Department of Chemistry > Center for Education and Research on Macromolecules (CERM)
Alves, Margot ;  University of Bordeaux, Institute of Molecular Sciences, France
Tassaing, Thierry;  University of Bordeaux, Institute of Molecular Sciences, France
Grignard, Bruno ;  University of Liège - ULiège > Department of Chemistry > Center for Education and Research on Macromolecules (CERM)
Gilbert, Bernard ;  University of Liège (ULg), Department of Chemistry, Analytic Chemistry and Electrochemistry
Detrembleur, Christophe ;  University of Liège - ULiège > Department of Chemistry > Center for Education and Research on Macromolecules (CERM)
Jérôme, Christine  ;  University of Liège - ULiège > Department of Chemistry > Center for Education and Research on Macromolecules (CERM)
Language :
English
Title :
Carbon dioxide, a cheap bio-sourced building block for cyclic carbonates and non-isocyanate polyurethanes
Publication date :
03 May 2015
Event name :
International Symposium on Green Chemistry (ISGC)
Event place :
La Rochelle, France
Event date :
3/05/2015 - 7/05/2015
Audience :
International
Name of the research project :
CO2Green project
Funders :
F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE]
Walloon region [BE]
Commentary :
This poster was presented by Sandro Gennen
Available on ORBi :
since 26 May 2015

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