Annandarajah Cindu, Li Peng, Michel Mitchel, Chen Yuanfen, Jamshidi Reihaneh, Kiziltas Alper, Hoch Richard, Grewell David, Montazami Reza
Agricultural and Biosystems Engineering, Iowa State University, Ames, IA 50011, USA.
Department of Mechanical Engineering, Iowa State University, Ames, IA 50011, USA.
Materials (Basel). 2018 Dec 29;12(1):99. doi: 10.3390/ma12010099.
Thermoplastic resins (linear low-density polyethylene (LLDPE), high-density polyethylene (HDPE), and polypropylene (PP)) reinforced by different content ratios of raw agave fibers were prepared and characterized in terms of their mechanical, thermal, and chemical properties as well as their morphology. The morphological properties of agave fibers and films were characterized by scanning electron microscopy and the variations in chemical interactions between the filler and matrix materials were studied using Fourier-transform infrared spectroscopy. No significant chemical interaction between the filler and matrix was observed. Melting point and crystallinity of the composites were evaluated for the effect of agave fiber on thermal properties of the composites, and modulus and yield strength parameters were inspected for mechanical analysis. While addition of natural fillers did not affect the overall thermal properties of the composite materials, elastic modulus and yielding stress exhibited direct correlation to the filler content and increased as the fiber content was increased. The highest elastic moduli were achieved with 20 wt % agave fiber for all the three composites. The values were increased by 319.3%, 69.2%, and 57.2%, for LLDPE, HDPE, and PP, respectively. The optimum yield stresses were achieved with 20 wt % fiber for LLDPE increasing by 84.2% and with 30 wt % for both HDPE and PP, increasing by 52% and 12.3% respectively.
制备了由不同含量比例的龙舌兰原纤维增强的热塑性树脂（线性低密度聚乙烯（LLDPE）、高密度聚乙烯（HDPE）和聚丙烯（PP）），并对其力学、热学、化学性能以及形态进行了表征。通过扫描电子显微镜对龙舌兰纤维和薄膜的形态特性进行了表征，并使用傅里叶变换红外光谱研究了填料与基体材料之间化学相互作用的变化。未观察到填料与基体之间有明显的化学相互作用。评估了复合材料的熔点和结晶度，以研究龙舌兰纤维对复合材料热性能的影响，并检查了模量和屈服强度参数以进行力学分析。虽然添加天然填料不会影响复合材料的整体热性能，但弹性模量和屈服应力与填料含量呈直接相关，并随着纤维含量的增加而增加。对于所有三种复合材料，添加20 wt%的龙舌兰纤维时可获得最高的弹性模量。LLDPE、HDPE和PP的值分别提高了319.3%、69.2%和57.2%。对于LLDPE，添加20 wt%的纤维可达到最佳屈服应力，提高了84.2%；对于HDPE和PP，添加30 wt%的纤维可达到最佳屈服应力，分别提高了52%和12.3%。
Zotero 插件
