Serrano Luis, Rincón Esther, García Araceli, Rodríguez Jesús, Briones Rodrigo
Inorganic Chemistry and Chemical Engineering Department, University of Cordoba, 14014 Cordoba, Spain.
Organic Chemistry Department, University of Cordoba, 14014 Cordoba, Spain.
Polymers (Basel). 2020 Nov 10;12(11):2646. doi: 10.3390/polym12112646.
In the present work, an abundant and unused residue (wheat straw) has been employed to synthesize a polyol as a substituent of castor oil in polyurethane foams. The liquefied product showed excellent properties for the proposed application. Castor oil was substituted with up to 50% wheat straw polyol in the formulation of polyurethane foams, which were prepared using two different isocyanates (methylene diphenyl diisocyanate (MDI) and toluene-2,4-diisocyanate (TDI)). The evaluation of physical, mechanical, and thermal properties of the foams revealed that these materials can successfully be formed with up to 40% wheat straw polyols since all the results were improved. Moreover, at this polyol concentration, the morphology of the foams was presented as a compact and ordered structure. Following this trend, the foams showed excellent biodegradability at 30 days (5.60 and 7.31% for TDI and MDI foams, respectively) and 60 days (8.49 and 9.88% for TDI and MDI foams, respectively) in the soil media tests carried out. Thus, the materials prepared in this work can be proposed for agricultural applications such as use in plant nurseries.
在本研究中，一种丰富且未被利用的残留物（麦秸）被用于合成一种多元醇，作为聚氨酯泡沫中蓖麻油的替代品。该液化产物在所提出的应用中表现出优异的性能。在聚氨酯泡沫配方中，蓖麻油被高达50%的麦秸多元醇替代，这些泡沫是使用两种不同的异氰酸酯（二苯基甲烷二异氰酸酯（MDI）和甲苯-2,4-二异氰酸酯（TDI））制备的。对泡沫的物理、机械和热性能的评估表明，这些材料使用高达40%的麦秸多元醇能够成功制成，因为所有结果都有所改善。此外，在这种多元醇浓度下，泡沫的形态呈现为致密且有序的结构。按照这一趋势，在进行的土壤介质测试中，泡沫在30天（TDI和MDI泡沫分别为5.60%和7.31%）和60天（TDI和MDI泡沫分别为8.49%和9.88%）时表现出优异的生物降解性。因此，本研究中制备的材料可用于农业应用，如在植物苗圃中的使用。
