Kurańska Maria, Benes Hynek, Kockova Olga, Malewska Elżbieta, Kucała Michał, Zemła Marcin, Michałowski Sławomir, Prociak Aleksander
Cracow University of Technology, Faculty of Chemical Engineering and Technology, Department of Chemistry and Technology of Polymers, Warszawska 24, 31-155, Cracow, Poland; Cracow University of Technology, Interdisciplinary Center for Circular Economy, Warszawska 24, 31-155, Cracow, Poland.
Czech Academy of Sciences, Institute of Macromolecular Chemistry, Heyrovskeho n'am. 2, Praha 6, 162 00, Czech Republic.
J Environ Manage. 2025 Sep;392:126855. doi: 10.1016/j.jenvman.2025.126855. Epub 2025 Aug 5.
Glycolysis is an efficient chemical degradation method allowing depolymerization of thermosetting rigid polyurethane foams into reusable monomers and oligomers. This study looks into a chemolysis of polyurethane biofoams containing different amounts of biopolyol (25-100 %) in the polyol premix. Increasing the biopolyol content in a foam had a positive effect on the viscosity of the rebiopolyol obtained as a result of the chemolysis reaction. As the biopolyol content increased, the viscosity decreased from 56,000 mPa s (foam subjected to chemolysis without biopolyol) to 4400 mPa s, which is by over 90 %. The foaming process was not affected in any significant way by different chemical structures of the rebiopolyols, as confirmed by, among others, FTIR and MALDI-TOF. The content of rebiopolyol in the system had a significant effect on the course of the foaming process, regardless the rebiopoyol structure. The rebiopolyol chemical structure has a significant impact on the content of closed cells of the newly-produced biofoams. The foams containing the rebiopolyols derived from the foams having more than 50 % of petrochemical polyol were characterized by the highest degree of cell openness. The content of closed cells had a direct impact on the foam mechanical properties. The lower the closed cells content, the worse the foam compression strength. However, it should be noted that open-cell foams are finding more and more applications. Thus, the effect observed in this study seems to be leading in a promising direction for the development of open-cell biofoams with the participation of rebiopolyols.
糖酵解是一种高效的化学降解方法，可将热固性硬质聚氨酯泡沫解聚为可重复使用的单体和低聚物。本研究探讨了在多元醇预混物中含有不同量生物多元醇（25%-100%）的聚氨酯生物泡沫的化学分解。增加泡沫中生物多元醇的含量对化学分解反应产生的再生物多元醇的粘度有积极影响。随着生物多元醇含量的增加，粘度从56000 mPa·s（未添加生物多元醇进行化学分解的泡沫）降至4400 mPa·s，降幅超过90%。傅里叶变换红外光谱（FTIR）和基质辅助激光解吸电离飞行时间质谱（MALDI-TOF）等分析结果证实，再生物多元醇的不同化学结构对发泡过程没有显著影响。无论再生物多元醇的结构如何，体系中再生物多元醇的含量对发泡过程有显著影响。再生物多元醇的化学结构对新生产的生物泡沫的闭孔含量有显著影响。含有源自石化多元醇含量超过50%的泡沫的再生物多元醇的泡沫，其泡孔开放程度最高。闭孔含量直接影响泡沫的力学性能。闭孔含量越低，泡沫的压缩强度越差。然而，应该指出的是，开孔泡沫的应用越来越广泛。因此，本研究中观察到的效应似乎为再生物多元醇参与的开孔生物泡沫的开发指明了一个有前景的方向。
