[en] Polyurethane (PU) is one of the most important family of polymers that is largely used in coatings, foams, elastomers, sealants/adhesives in the building, automotive, household and biomedical sectors. Classically, PU is produced by a step-growth polymerization between di- or polyols and di- or polyisocyanates. However, isocyanates are toxic and produced from even more toxic phosgene. To avoid the use of isocyanates, different synthetic alternatives for PUs have been developed. One of the most studied approaches relies on the step-growth polymerization between di- or polyamines and CO2-sourced di- or polycyclic carbonates, affording poly(β-hydroxyurethane)s (PHUs) that showed improved thermal, chemical and mechanical properties compared to conventional PUs. In this study, we would like to show how PHUs can be exploited to design (bio- and) CO2-based foams for thermal insulation as well as novel reinforced hydrogels for potential biomedical applications.
First, we developed a highly efficient binary organocatalyst for the fast and selective synthesis of cyclic carbonates under very mild conditions from CO2 and various epoxides, including bio-based ones. Secondly, these cyclic carbonates were valorised as monomers for the preparation of foams and hydrogels based on PHUs.
In this poster, we will describe the preparation and characterization of these PHU foams and hydrogels, and highlight their huge potential as thermal insulating materials (PHU foams) or as biomaterials for shock absorption properties (PHU hydrogels).
Research Center/Unit :
Center for Education and Research on Macromolecules (CERM) CESAM Complex and Entangled Systems from Atoms to Materials (CESAM)
Disciplines :
Chemistry Materials science & engineering
Author, co-author :
Gennen, Sandro ; University of Liège - ULiège > Complex and Entangled Systems from Atoms to Materials (CESAM), Center for Education and Research on Macromolecules (CERM)
Grignard, Bruno ; University of Liège - ULiège > Complex and Entangled Systems from Atoms to Materials (CESAM), Center for Education and Research on Macromolecules (CERM)
Alves, Margot; University of Liège - ULiège > Complex and Entangled Systems from Atoms to Materials (CESAM), Center for Education and Research on Macromolecules (CERM)
Thomassin, Jean-Michel ; University of Liège - ULiège > Complex and Entangled Systems from Atoms to Materials (CESAM), Center for Education and Research on Macromolecules (CERM)
Tassaing, Thierry; University of Bordeaux, Institute of Molecular Sciences, France
Jérôme, Christine ; University of Liège - ULiège > Complex and Entangled Systems from Atoms to Materials (CESAM), Center for Education and Research on Macromolecules (CERM)
Detrembleur, Christophe ; University of Liège - ULiège > Complex and Entangled Systems from Atoms to Materials (CESAM), Center for Education and Research on Macromolecules (CERM)
Language :
English
Title :
How to exploit bio- and CO2-based isocyanates-free polyurethanes for environmental and biomedical applications?
Publication date :
04 May 2017
Event name :
Belgian Polymer Group (BPG) Annual Meeting
Event place :
Houffalize, Belgium
Event date :
04/05/2017 - 05/05/2017
Audience :
International
Funders :
F.R.S.-FNRS - Fonds de la Recherche Scientifique The Walloon Region in the frame of the Flycoat and CO2Green projects FRIA - Fonds pour la Formation à la Recherche dans l'Industrie et dans l'Agriculture
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