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首页> 外文期刊>Journal of Applied Polymer Science >Effects of nanofiber treatments on the properties of vapor-grown carbon fiber reinforced polymer composites
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Effects of nanofiber treatments on the properties of vapor-grown carbon fiber reinforced polymer composites

机译：纳米纤维处理对气相生长碳纤维增强聚合物复合材料性能的影响

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Vapor-grown carbon fibers (VGCFs) were exposed to a series of chemical treatments and to electro-chemical deposition of copper to modify their surface conditions and alter their electrical properties. The fibers were then mixed with polypropylene using a Banbury-type mixer obtaining composites up to 5 wt % VGCFs. Rheological, electrical, and mechanical properties were evaluated and compared to unfilled polypropylene processed in a similar manner. The composites made with HNO3-treated VGCFs showed a lower electrical resistivity compared to the untreated samples. The composites containing VGCFs subjected to the copper electrodeposition process showed the lowest resistivity with no change in the mechanical proper-ties. Changes in rheological properties demonstrated the effects of varying surface conditions of the VGCFs. Microscopic analysis of these composites showed a heterogeneous distribution of VGCFs forming an interconnected network with the presence of copper on the surface of the VGCFs and in the matrix. Both the interconnected network and the presence of copper led to a lower percolation threshold than those seen in a previous work where high dispersion was sought. (C) 2003 Wiley Periodicals, Inc. [References: 33]
机译：气相生长的碳纤维（VGCF）经历了一系列化学处理和铜的电化学沉积，以改变其表面条件并改变其电性能。然后使用班伯里（Banbury）型混合器将纤维与聚丙烯混合，从而获得高达5重量％的VGCF的复合材料。评估流变，电气和机械性能，并将其与以类似方式加工的未填充聚丙烯进行比较。与未经处理的样品相比，由HNO3处理的VGCF制成的复合材料显示出较低的电阻率。含VGCFs的复合材料经过铜电沉积处理后显示出最低的电阻率，而机械性能没有变化。流变性质的变化证明了VGCF表面条件的变化。这些复合材料的微观分析表明，VGCF的分布不均匀，形成了互连的网络，在VGCF的表面和基质中均存在铜。互连网络和铜的存在都导致渗滤阈值比以前的工作中寻求高分散性的渗漏阈值低。 （C）2003 Wiley Periodicals，Inc. [参考：33]

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