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枣椰树纤维增强不同聚丙烯基体的表征

Characterization of Date Palm Fiber-Reinforced Different Polypropylene Matrices.

作者信息

Sh Al-Otaibi Mohammed, Alothman Othman Y, Alrashed Maher M, Anis Arfat, Naveen Jesuarockiam, Jawaid Mohammad

机构信息

National Industrialization Company (Tasnee), Riyadh 11496, Saudi Arabia.

Department of Chemical Engineering, College of Engineering, King Saud University, Riyadh 11421, Saudi Arabia.

出版信息

Polymers (Basel). 2020 Mar 5;12(3):597. doi: 10.3390/polym12030597.

DOI:10.3390/polym12030597
PMID:32151079
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7182893/
Abstract

In this study, the effect of different polypropylene (PP) matrices (homopolymer (HPP), impact copolymer (ICP), and recycled polypropylene (rPP)) on the mechanical, morphological, and thermal properties of date palm fiber (DPF)-reinforced PP composites was investigated. The DPFs were treated with an alkali solution, and composites were fabricated with different DPF loadings (5, 10, and 15 wt %) and lengths (less than 2 mm and 8-12 mm). It was found that the tensile properties of the DPF/ICP and DPF/rPP composites were similar to those of the DPF/HPP composites. The addition of fiber to the matrix reduced its tensile strength but increased the modulus. The alkali treatment improved the compatibility between the fibers and the matrix by removing hemicellulose and other impurities. Fourier transform infrared spectroscopy confirmed hemicellulose removal. The morphology of the alkali-treated fractured tensile specimen revealed improved adhesion and less fiber pull out. Differential scanning calorimetry revealed that the alkali treatment enhanced the crystallinity index. Thermogravimetric analysis showed that the addition of DPFs into the PP matrix reduced the thermal stability of the composite. However, the thermal stability of the treated fiber-reinforced rPP and ICP composites was similar to that of the DPF/HPP composite. Hence, rPP can be used as an alternative to HPP with DPFs.

摘要

在本研究中，研究了不同聚丙烯（PP）基体（均聚物（HPP）、抗冲共聚物（ICP）和再生聚丙烯（rPP））对枣椰纤维（DPF）增强PP复合材料的力学、形态和热性能的影响。对DPF进行了碱溶液处理，并制备了具有不同DPF含量（5%、10%和15%重量）和长度（小于2毫米和8 - 12毫米）的复合材料。结果发现，DPF/ICP和DPF/rPP复合材料的拉伸性能与DPF/HPP复合材料相似。向基体中添加纤维降低了其拉伸强度，但提高了模量。碱处理通过去除半纤维素和其他杂质改善了纤维与基体之间的相容性。傅里叶变换红外光谱证实了半纤维素的去除。碱处理后的断裂拉伸试样的形态显示出更好的粘附性和更少的纤维拔出。差示扫描量热法表明碱处理提高了结晶度指数。热重分析表明，向PP基体中添加DPF降低了复合材料的热稳定性。然而，经处理的纤维增强rPP和ICP复合材料的热稳定性与DPF/HPP复合材料相似。因此，rPP可作为DPF增强HPP的替代品。

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