Wood adhesives from waste-free recycling depolymerisation of flexible polyurethane foams

0542063 - ÚTAM 2022 RIV GB eng J - Journal Article
Beran, R. - Zárybnická, Lucie - Machová, Dita - Večeřa, M. - Kalenda, P.
Wood adhesives from waste-free recycling depolymerisation of flexible polyurethane foams.
Journal of Cleaner Production. Roč. 305, July (2021), č. článku 127142. ISSN 0959-6526. E-ISSN 1879-1786
Institutional support: RVO:68378297
Keywords : flexible polyurethane foams * chemical recycling * depolymerisation * adhesive * formulation Wood
OECD category: Materials engineering
Impact factor: 11.072, year: 2021
Method of publishing: Limited access
https://doi.org/10.1016/j.jclepro.2021.127142

Flexible polyurethane foams (FPUF) are common plastic materials used in industry or consumer goods (heat and sound insulation, washing sponges, car seats). FPUF wastes are frequently taken to landfills and incineration, which causes environmental problems. The current method of physical recycling for rebound foams seems to be efficient, however, with limited usage in the structure of mattresses or construction insulations. Disadvantages of the current chemical recycling methods of FPUF consist of the slow reaction process, high energy consumption, and production of secondary waste by-products. This article deals with the special technique of the controlled depolymerisation of the studied FPUF. FPUF was depolymerised in an ambience of non-reactive liquid at a temperature of 130 °C, only giving liquid products. The depolymerisation process and the final product was characterised by titration methods, Fourier Transform-Infrared Spectroscopy (FT-IR), Gas Chromatography/Mass Spectrometry (GC/MS), and Gel Permeable Chromatography (GPC). The recycled polyol (product of depolymerisation) was tested in model polyurethane adhesive formulations and evaluated for shear tensile strength on spruce wood test pieces.
Permanent Link: http://hdl.handle.net/11104/0319553