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首页> 外文期刊>Journal of Polymers and the Environment >Effect of Nano-SiO2 and Bark Flour Content on the Physical and Mechanical Properties of Wood-Plastic Composites
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Effect of Nano-SiO2 and Bark Flour Content on the Physical and Mechanical Properties of Wood-Plastic Composites

机译：纳米SiO2和树皮粉含量对木塑复合材料物理力学性能的影响

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摘要

The aim of this study is to evaluate the impact of nano-SiO2 and bark flour (BF) on the natural fiber-plastic composites engineering properties made from high density polyethylene (HDPE) and beech wood flour (WF). For this purpose, WF and BF in 60 mesh size and weight ratio of (50, 0 %), (30, 20 %), (10, 40 %) and (0, 50 %) respectively were mixed with HDPE. In order to increase the interfacial adhesion between the filler and the matrix, the maleic anhydride grafted polyethylene was constantly used at 3 wt% for all formulations as a coupling agent. The nano-SiO2 particles with weight ratio of 0, 1, 2, and 4 % were also utilized to enhance the composites properties. The materials were mixed in an internal mixer (HAAKE) and then the bark and/or wood-plastic composite samples were made utilizing an injection molding machine. The physical tests including water absorption and thickness swelling, and mechanical tests including bending characteristics and un-notched impact strength were carried out on the samples based on ASTM standard. The results indicated that as the BF content increased in the composite, mechanical and physical properties were reduced, but the given properties were increased with the addition of nano-SiO2. The addition of nano-SiO2 had a negative impact on the physical properties, but when it was up to 2 %, it increased the impact strength.
机译：这项研究的目的是评估纳米SiO2和树皮粉（BF）对由高密度聚乙烯（HDPE）和山毛榉木粉（WF）制成的天然纤维-塑料复合材料工程性能的影响。为此，将60目尺寸和重量比分别为（50、0％），（30、20％），（10、40％）和（0、50％）的WF和BF与HDPE混合。为了增加填料与基体之间的界面粘合性，对于所有制剂，马来酸酐接枝的聚乙烯以3重量％的比例恒定地用作偶联剂。重量比为0、1、2和4％的纳米SiO2颗粒也被用来增强复合材料的性能。将材料在内部混合器（HAAKE）中混合，然后使用注射成型机制备树皮和/或木塑复合材料样品。根据ASTM标准对样品进行了包括吸水率和厚度膨胀的物理测试，以及包括弯曲特性和无缺口冲击强度的机械测试。结果表明，随着复合材料中BF含量的增加，力学性能和物理性能降低，但随着纳米SiO2的加入，给定性能提高。纳米SiO 2的添加对物理性质具有负面影响，但是当其高达2％时，其增加了冲击强度。

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