De la Hoz Alford Lorenleyn, de Souza Camila Gomes Peçanha, Paciornik Sidnei, d'Almeida José Roberto M, Leite Brenno Santos, Avila Harold C, Léonard Fabien, Bruno Giovanni
Department of Chemical and Materials Engineering, Pontifical Catholic University of Rio de Janeiro (PUC-Rio), Rio de Janeiro 22451-900, RJ, Brazil.
Department of Basic and Biomedical Sciences, Simón Bolívar University, Barranquilla 080020, Atlántico, Colombia.
Materials (Basel). 2023 Mar 6;16(5):2118. doi: 10.3390/ma16052118.
Two biopolyol-based foams derived from banana leaves (BL) or stems (BS) were produced, and their compression mechanical behavior and 3D microstructure were characterized. Traditional compression and in situ tests were performed during 3D image acquisition using X-ray microtomography. A methodology of image acquisition, processing, and analysis was developed to discriminate the foam cells and measure their numbers, volumes, and shapes along with the compression steps. The two foams had similar compression behaviors, but the average cell volume was five times larger for the BS foam than the BL foam. It was also shown that the number of cells increased with increasing compression while the average cell volume decreased. Cell shapes were elongated and did not change with compression. A possible explanation for these characteristics was proposed based on the possibility of cell collapse. The developed methodology will facilitate a broader study of biopolyol-based foams intending to verify the possibility of using these foams as green alternatives to the typical petrol-based foams.
制备了两种由香蕉叶（BL）或茎（BS）衍生的生物多元醇基泡沫材料，并对其压缩力学行为和三维微观结构进行了表征。在使用X射线显微断层扫描进行三维图像采集的过程中，进行了传统压缩试验和原位试验。开发了一种图像采集、处理和分析方法，以区分泡沫孔泡并测量其数量、体积和形状以及压缩步骤。两种泡沫材料具有相似的压缩行为，但BS泡沫的平均泡孔体积是BL泡沫的五倍。研究还表明，随着压缩程度的增加，泡孔数量增加而平均泡孔体积减小。泡孔形状呈细长状，且不随压缩而变化。基于泡孔塌陷的可能性，对这些特性提出了一种可能的解释。所开发的方法将有助于更广泛地研究生物多元醇基泡沫材料，以验证使用这些泡沫材料替代典型石油基泡沫材料作为绿色替代品的可能性。
