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木质硬质聚氨酯复合材料的合成与表征

Synthesis and Characterization of Wood Rigid Polyurethane Composites.

作者信息

Bradai Hamza, Koubaa Ahmed, Bouafif Hassine, Langlois Armand, Samet Basma

机构信息

Institut de Recherche sur Les Forêts, Université du Québec en Abitibi-Témiscamingue, 445 Boul. Université, Rouyn-Noranda, QC J9X 5E4, Canada.

Centre Technologique des Résidus Industriels (CTRI), Rouyn-Noranda, QC J9X 5E5, Canada.

出版信息

Materials (Basel). 2022 Jun 18;15(12):4316. doi: 10.3390/ma15124316.

DOI:10.3390/ma15124316
PMID:35744375
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9229658/
Abstract

Incorporating biodegradable reinforcement, such as wood particles, into rigid polyurethane foams (RPUFs) is among the alternatives to reduce their environmental impact. This study aims to assess the effect of different wood particles as reinforcement in RPUFs. Reinforced rigid polyurethane foams are synthesized with milled wood particles of various forms and sizes and commercial polyol and isocyanate. The effect of fiber treatments and mechanical stirring on foams' properties is also studied. Additional tests on polyisocyanurate foams (PIR) were undertaken to assess the effect of reinforcement on their properties. Mechanical properties are measured to investigate the impact of wood particle reinforcement on the foam. Confocal microscopy and Fourier-transform infrared spectroscopy (FTIR) showed the interaction between the wood fibers and the matrix. Despite the adhesion observed for some fibers, most of the cell walls of RPUFs were punctured by the rigid wood fibers, which explained the decrease in the compressive strength of the composites for manually mixed foams. Mechanical stirring proved to be an efficient method to enhance the reinforcement power of untreated fibers. RPUF foams' properties showed similar changes when untreated wood flour was introduced to the formula, increasing compressive strength significantly.

摘要

将可生物降解的增强材料（如木颗粒）加入硬质聚氨酯泡沫（RPUF）中，是降低其环境影响的替代方法之一。本研究旨在评估不同木颗粒作为RPUF增强材料的效果。用各种形状和尺寸的磨碎木颗粒与商用多元醇和异氰酸酯合成增强硬质聚氨酯泡沫。还研究了纤维处理和机械搅拌对泡沫性能的影响。对聚异氰脲酸酯泡沫（PIR）进行了额外测试，以评估增强材料对其性能的影响。测量机械性能以研究木颗粒增强材料对泡沫的影响。共聚焦显微镜和傅里叶变换红外光谱（FTIR）显示了木纤维与基体之间的相互作用。尽管观察到一些纤维有粘附现象，但RPUF的大多数细胞壁被硬质木纤维刺穿，这解释了手动混合泡沫复合材料抗压强度下降的原因。事实证明，机械搅拌是增强未处理纤维增强能力的有效方法。当将未处理的木粉引入配方中时，RPUF泡沫的性能表现出类似的变化，抗压强度显著提高。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ca66/9229658/21588dcc717f/materials-15-04316-g013.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ca66/9229658/969e9c9d626c/materials-15-04316-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ca66/9229658/326b13c28c41/materials-15-04316-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ca66/9229658/4838e543724f/materials-15-04316-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ca66/9229658/b3105bdeb0af/materials-15-04316-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ca66/9229658/3addaf67d582/materials-15-04316-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ca66/9229658/3b6fce9b0c71/materials-15-04316-g006a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ca66/9229658/8d91707b44e4/materials-15-04316-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ca66/9229658/6472133b3fb0/materials-15-04316-g008a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ca66/9229658/66e7bd0ae981/materials-15-04316-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ca66/9229658/bde51e8cf847/materials-15-04316-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ca66/9229658/ce20d989cdcf/materials-15-04316-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ca66/9229658/b2b8eed3ba84/materials-15-04316-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ca66/9229658/21588dcc717f/materials-15-04316-g013.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ca66/9229658/969e9c9d626c/materials-15-04316-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ca66/9229658/326b13c28c41/materials-15-04316-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ca66/9229658/4838e543724f/materials-15-04316-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ca66/9229658/b3105bdeb0af/materials-15-04316-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ca66/9229658/3addaf67d582/materials-15-04316-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ca66/9229658/3b6fce9b0c71/materials-15-04316-g006a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ca66/9229658/8d91707b44e4/materials-15-04316-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ca66/9229658/6472133b3fb0/materials-15-04316-g008a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ca66/9229658/66e7bd0ae981/materials-15-04316-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ca66/9229658/bde51e8cf847/materials-15-04316-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ca66/9229658/ce20d989cdcf/materials-15-04316-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ca66/9229658/b2b8eed3ba84/materials-15-04316-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ca66/9229658/21588dcc717f/materials-15-04316-g013.jpg

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Research of Wood Waste as a Potential Filler for Loose-Fill Building Insulation: Appropriate Selection and Incorporation into Polyurethane Biocomposite Foams.
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