No full text
Poster (Scientific congresses and symposiums)
Synthesis of CO2-sourced hydrogels by using the non-isocyanate polyurethane (NIPU) chemistry
Gennen, Sandro; Grignard, Bruno; Thomassin, Jean-Michel et al.
2016Belgian Polymer Group (BPG) Annual Meeting
 

Files


Full Text
No document available.

Send to



Details



Keywords :
supercritical carbon dioxide
Abstract :
[en] Polyurethane (PUs) is one of the most important polymers and finds applications as elastomers, coatings, adhesives and sealants for automotive or construction. PU is also a material of choice in the biomedical domain due to its good biocompatibility, biodegradation and mechanical properties. Especially, PUs hydrogels have been developed in the last years for biomedical applications such as soft contact lenses, wound dressing, drug delivery systems and scaffolds for tissue engineering. Traditionally, PUs are synthesized by a step-growth polymerization between diols and diisocyanates. Because of toxicity issues and a possible interdiction of isocyanates, we focused on developing new PU hydrogels using a non-isocyanate route (Figure 1). The polyurethanes formed by this route are called NIPU (for Non-Isocyanate PolyUrethane). Firstly, chemically cross-linked NIPU gels were synthesized by solvent-free polycondensation between a hydrophilic CO2-sourced polyethyleneglycol bi-cyclic carbonate and a diamine in the presence of a crosslinker. Then, NIPU gels were swelled in water till water equilibrium before characterization of their mechanical properties by compression tests. The influence of the cross-linking ratios (diamine/crosslinker ratio) and diamine structure on the swelling and the compression properties were studied. To reinforce the compression properties of NIPU hydrogel (increase in stress at break, strain at break and compression modulus), a nanofiller was dispersed in the cyclic carbonate/diamine/crosslinker formulation prior to polymerization. For the first time, nanocomposite NIPU hydrogels with high water contents (up to 80%) and good compression properties have been prepared by using low clay content.
Research center :
Center for Education and Research on Macromolecules (CERM)
Disciplines :
Chemistry
Materials science & engineering
Author, co-author :
Gennen, Sandro ;  University of Liège - ULiège > Department of Chemistry > Center for Education and Research on Macromolecules (CERM)
Grignard, Bruno ;  University of Liège - ULiège > Department of Chemistry > Center for Education and Research on Macromolecules (CERM)
Thomassin, Jean-Michel ;  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
Vertruyen, Bénédicte  ;  University of Liège (ULg), Department of Chemistry, Group of Research in Energy and ENvironment from MATerials (GREENMAT) - Laboratory of Structural Inorganic Chemistry (LCIS)
Jérôme, Christine  ;  University of Liège - ULiège > Department of Chemistry > Center for Education and Research on Macromolecules (CERM)
Detrembleur, Christophe ;  University of Liège - ULiège > Department of Chemistry > Center for Education and Research on Macromolecules (CERM)
Language :
English
Title :
Synthesis of CO2-sourced hydrogels by using the non-isocyanate polyurethane (NIPU) chemistry
Publication date :
23 May 2016
Event name :
Belgian Polymer Group (BPG) Annual Meeting
Event place :
Hasselt, Belgium
Event date :
23/05/2016 - 24/05/2016
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 03 June 2016

Statistics


Number of views
277 (11 by ULiège)
Number of downloads
0 (0 by ULiège)

Bibliography


Similar publications



Contact ORBi