Article (Scientific journals)
Cascade Exotherms for Rapidly Producing Hybrid Nonisocyanate Polyurethane Foams from Room Temperature Formulations.
Bourguignon, Maxime; Grignard, Bruno; Detrembleur, Christophe
2024In Journal of the American Chemical Society
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Keywords :
polyurethane; foam
Abstract :
[en] For decades, self-blown polyurethane foams─found in an impressive range of materials─are produced by the toxic isocyanate chemistry and are difficult to recycle. Producing them in existing production plants by a rapid isocyanate-free self-blowing process from room temperature (RT) formulations is a long-lasting challenge. The recent water-induced self-blowing of nonisocyanate polyurethane (NIPU) formulations composed of a CO2-based tricyclic carbonate, diamine, water, and a catalyst successfully addressed the isocyanate issue, however failed to provide foams at RT. Herein, we elaborate a practical solution to empower the NIPU foam formation in record timeframes from RT formulations. We generate cascade exotherms by the addition of a highly reactive triamine and an epoxide to the formulation of the water-induced self-foaming process. These exotherms, combined to a fast cross-linking imparted by the triamine and epoxide, rapidly raise the temperature to the foaming threshold and deliver hybrid NIPU foams in 5 min with KOH as a catalyst. Careful selection of the monomers enables producing foams with a wide range of properties, as well as with an unprecedented high biobased content up to 90 wt %. Moreover, foams can be upcycled into polymer films by hot pressing, offering them a facile reuse scenario. This robust cheap process opens huge perspectives for greener foams of high biobased contents, expectedly responding to the sustainability demands of the foam sector. It is potentially compatible to the retrofitting of industrial foaming infrastructures, which is of paramount importance to accommodate existing foam production plants and address the huge foam market demands.
Research center :
CESAM - Complex and Entangled Systems from Atoms to Materials - ULiège [BE]
CERM - Center for Education and Research on Macromolecules - ULiège [BE]
FRITCO2T - Federation of Researchers in Innovative Technologies for CO2 [BE]
Disciplines :
Materials science & engineering
Chemistry
Author, co-author :
Bourguignon, Maxime ;  University of Liège [ULiège] - Complex and Entangled Systems from Atoms to Materials [CESAM] Research Unit - Center for Education and Research on Macromolecules [CERM] - Belgium
Grignard, Bruno  ;  University of Liège [ULiège] - Complex and Entangled Systems from Atoms to Materials [CESAM] Research Unit - Federation of Researchers in Innovative Technologies for CO2 [FRITCO2T] - Center for Education and Research on Macromolecules [CERM] - Belgium
Detrembleur, Christophe  ;  University of Liège [ULiège] - Complex and Entangled Systems from Atoms to Materials [CESAM] Research Unit - Center for Education and Research on Macromolecules [CERM] - Belgium
Language :
English
Title :
Cascade Exotherms for Rapidly Producing Hybrid Nonisocyanate Polyurethane Foams from Room Temperature Formulations.
Publication date :
2024
Journal title :
Journal of the American Chemical Society
ISSN :
0002-7863
eISSN :
1520-5126
Publisher :
American Chemical Society (ACS), United States
Peer reviewed :
Peer Reviewed verified by ORBi
Name of the research project :
The Walloon region [BE] in the frame of the WIN2WAL program and the "ECOFOAM" project
The Walloon region [BE] in the frame of the FRFS-WEL-T program and the "CHEMISTRY” - WEL-T-CR-2023 A − 02" project
Funders :
F.R.S.-FNRS - Fund for Scientific Research [BE]
Walloon region [BE]
Funding text :
The authors thank the Region Wallonne for funding the Win2Wal project “ECOFOAM” (convention 2010130). They also thank the company NMC sa (Belgium) for their support in this research. The authors are very grateful to Grégory Cartigny for technical assistance in the preparation of the formulations and the foams. C.D. is the FNRS Research Director and thanks the “Fonds de la Recherche Scientifique (F.R.S.-FNRS)” for funding. Part of this work was realized to provide preliminary data supporting the feasibility of the WEL- T Advanced Grant proposal submitted by C.D. C.D. is particularly grateful to the Region Wallonne for having recently granted this project (FRFS-WEL-T; project “CHEMISTRY”, convention WEL-T-CR-2023 A − 02). The authors have patented the technology (WO 2023/104362A1). A preprint of this article appeared on ChemRxiv at DOI: 10.26434/ chemrxiv-2023-t48bf;
Commentary :
The authors have patented the technology [WO 2023/104362A]). A preprint of this article appeared on ChemRxiv at DOI: 10.26434/ chemrxiv-2023-t48bf.
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