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Multifunctional and fully aliphatic biodegradable polyurethane foam as porous biomass carrier for biofiltration
Polymer Degradation and Stability ( IF 5.9 ) Pub Date : 2020-03-23 , DOI: 10.1016/j.polymdegradstab.2020.109156
Hynek Beneš , Věra Vlčková , Aleksandra Paruzel , Olga Trhlíková , Jan Chalupa , Lívia Kanizsová , Kateřina Skleničková , Martin Halecký

Water-blown fully aliphatic polyurethane foam was prepared at room temperature from trimer of hexamethylene diisocyanate and poly(diethylene glycol adipate) diol and post cured at 55 °C. In contrast to aromatic-based PUR foam analog, the produced flexible PUR foam exhibited highly porous structure with open cell content of 94% and average cell size of 700 μm. Therefore, it was subsequently tested as biodegradable cellular carrier of microorganisms (fungus Fusarium solani and bacterium Pseudomonas sp.) for biofiltration. Firstly, tests on enzyme activities (lipase, protease and urease) and utilization of PUR foam as the sole carbon and nitrogen source and determination of degradation products were carried out. Fusarium solani shown much higher both enzyme and degradation activities and higher spectrum of degradation products. Finally, the performance of a biofilter packed with the developed cellular carrier was investigated for removal of a mixture of acetone, propionic acid, ethyl acetate, toluene and α-pinene. Proven sorption properties of PUR foam against all pollutants and a high maximum elimination capacity of 218 ± 33 g m−3 h−1 make the new lightweight biofilm PU carrier suitable for this application due to their multi-functionality.



中文翻译:

多功能,全脂族可生物降解聚氨酯泡沫作为用于生物过滤的多孔生物质载体

在室温下由六亚甲基二异氰酸酯和聚(二甘醇己二酸酯)二醇的三聚体制备水发泡的全脂族聚氨酯泡沫,并在55°C后固化。与基于芳族的PUR泡沫类似物相比,生产的柔性PUR泡沫表现出高度多孔的结构,开孔含量为94%,平均孔尺寸为700μm。因此,其随后被测试为可生物降解的微生物(真菌镰刀镰刀菌和细菌假单胞菌)细菌的细胞载体。首先,进行了酶活性(脂肪酶,蛋白酶和脲酶)的测试,以及使用PUR泡沫作为唯一的碳和氮源以及降解产物的测定。枯萎镰刀菌显示出更高的酶和降解活性以及更高的降解产物谱。最后,研究了装有发达的细胞载体的生物滤池对丙酮,丙酸,乙酸乙酯,甲苯和α-pine烯的混合物的去除性能。经验证的PUR泡沫对所有污染物的吸附性能以及218±33 g m -3  h -1的高最大消除能力使这种新型的轻型生物膜PU载体具有多功能性,因此适合于该应用。

更新日期:2020-03-26
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