Exploring the potential of milkweed stalk in wood plastic manufacture

ABSTRACT

The physical and mechanical properties of milkweed composites based on different loads of milkweed flour and maleic anhydride grafted polypropylene (MAPP) using polypropylene as matrix are investigated in this study. There levels of milkweed fibers (30, 40, and 50 wt.%), one level of mixed milkweed flour (20:20 wt.% fiber:bark), and two levels of MAPP (4 and 6 wt.%) were used to prepare natural fiber-reinforced composites. Physical and mechanical properties including flexural, tension, impact, and thickness swelling were evaluated according to ASTM standards. The result demonstrated that addition of milkweed flour fluctuates mechanical properties of reinforced composite. However, the optimum load of milkweed flour was different in each test. Generally, 40 wt.% mixed flour composite in comparison with 40 wt.% milkweed composite showed lower mechanical results and higher thickness swelling. MAPP as a coupling agent improved physical and mechanical properties of milkweed-filled composites in most properties. The results of this study depicted positive effects of lignocellulose fibers and coupling gent and also negative effect of bark flour as a function of lower cellulose and higher extractive contents on physical and mechanical properties of milkweed-reinforced composites.

摘要

萝藦复合材料基于乳草属植物粉和聚丙烯接枝马来酸酐在不同荷载作用下的物理力学性能（MAPP）采用聚丙烯（PP）为基质的研究。有水平的乳草属植物的纤维（30, 40, 50重量%）、一级混合植物粉（20:20重量%的纤维：树皮），和两级MAPP（4，和6重量%）制备天然纤维增强复合材料。根据ASTM标准，对弯曲、拉伸、冲击和厚度膨胀等物理力学性能进行了评估。结果表明，萝藦面粉添加波动增强复合材料力学性能。然而，萝藦粉的最佳负荷试验各不同。一般来说，在40重量%的乳草属植物的综合比较40重量%的混合粉复合材料具有较低的机械效果和较高的吸水厚度膨胀率。MAPP偶联剂改善的物理和机械性能的乳草提交最性能的复合材料。这项研究结果描述了木质纤维素纤维和偶联剂的正面影响和负面影响为树皮粉纤维素降低复合材料的物理机械性能和较高的植物提取物含量的作用。

KEYWORDS:

• Milkweed flour
• polypropylene
• Tensile strength
• Flexural strength
• Impact strength

关键词:

• 马利筋面粉
• 聚丙烯
• 抗拉强度
• 抗弯强度
• 冲击强度