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首页> 外文会议>6th Annual SPE Automotive Composites Conference 2006 vol.1 >HEMP FIBRE REINFORCED POLYPROPYLENE COMPOSITES: EFFECT OF FIBRE TREATMENT AND COUPLING AGENT ON COMPOSITE STRENGTH AND FIBRE/MATRIX INTERFACIAL BONDING
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HEMP FIBRE REINFORCED POLYPROPYLENE COMPOSITES: EFFECT OF FIBRE TREATMENT AND COUPLING AGENT ON COMPOSITE STRENGTH AND FIBRE/MATRIX INTERFACIAL BONDING

机译：大麻纤维增强聚丙烯复合材料：纤维处理和偶联剂对复合强度和纤维/基体界面结合的影响

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Industrial hemp fibre reinforced thermoplastic composites are increasingly being used in the automotive industry. These composites are strong, stiff, lightweight and recyclable, but possess mechanical properties well below their potential values. The aim of this research was to improve the composite tensile strength and fibre/matrix interfacial bond strength by means of fibre treatment and use of a coupling agent. Hemp fibre was digested in a small pressure vessel with either a solution of 10wt% NaOH or 5wt% NaOH / 2wt% Na_2SO_3. Single fibre tensile tests were performed on treated and untreated fibres, and it was found that the 5wt% NaOH / 2wt% Na_2SO_3 treatment produced the strongest fibres with a good level of fibre separation. The treated fibres, polypropylene and a maleic anhydride modified polypropylene (MAPP) coupling agent were then compounded in a twin-screw extruder, and injection moulded into composite tensile test specimens. Tensile tests revealed that the optimum composite consisted of polypropylene with 40wt% fibre (treated with 5wt% NaOH / 2wt% Na_2SO_3) and 4wt% MAPP, and had a tensile strength of 50.5 MPa and Young's modulus of 5.31 GPa. The effect of MAPP on the interface of 5wt% NaOH / 2wt% Na_2SO_3 treated hemp fibre/polypropylene composites was assessed by means of the single fibre fragmentation test. It was found that a MAPP content of 4wt% greatly improved the stress transfer efficiency at the fibre/matrix interface.
机译：工业大麻纤维增强的热塑性复合材料正越来越多地用于汽车工业。这些复合材料坚固，坚硬，轻巧且可回收，但机械性能远低于其潜在值。这项研究的目的是通过纤维处理和使用偶联剂来改善复合材料的抗张强度和纤维/基质界面粘合强度。大麻纤维在小型压力容器中用10wt％NaOH或5wt％NaOH / 2wt％Na_2SO_3的溶液消化。在处理过的和未处理的纤维上进行了单纤维拉伸试验，发现5wt％NaOH / 2wt％Na_2SO_3处理可产生最强的纤维，并具有良好的纤维分离度。然后将处理过的纤维，聚丙烯和马来酸酐改性的聚丙烯（MAPP）偶联剂在双螺杆挤出机中混合，然后注塑成复合拉伸试样。拉伸试验表明，最佳复合材料由具有40wt％纤维的聚丙烯（用5wt％NaOH / 2wt％Na_2SO_3处理）和4wt％MAPP组成，拉伸强度为50.5 MPa，杨氏模量为5.31 GPa。通过单纤维断裂测试评估了MAPP对5wt％NaOH / 2wt％Na_2SO_3处理的大麻纤维/聚丙烯复合材料界面的影响。发现MAPP含量为4wt％大大改善了纤维/基质界面处的应力转移效率。

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