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首页> 外文期刊>International Journal of Electrochemical Science >Two-Step Approach Based on Solution Mixing and Hot Compaction for CNT/HDPE Nanocomposite Preparation
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Two-Step Approach Based on Solution Mixing and Hot Compaction for CNT/HDPE Nanocomposite Preparation

机译：基于溶液混合和热压的两步法制备CNT / HDPE纳米复合材料

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摘要

We present a simple two-step approach for preparing large uniform sheets of multi wall carbonnanotube/high density polyethylene (MWCNT/HDPE) nanocomposites. Fragmented pieces of thenanocompoite produced by solution mixing are fused into large uniform sheets using hot compactionfor short time. Nanocomposite samples with CNT content of 1, 2, and 3 wt% were prepared using thisapproach and characterized using SEM, XRD and impedance spectroscopy. SEM images of theprepared nanocomposites illustrate homogenous dispersion of the CNTs between the PE crystallinelamellae. Crystallinity of the HDPE matrix increases with increasing the CNTs content due to theirnucleating effect as revealed from the analysis of the XRD results. Impedance spectroscopy is used todetermine the electrical conductivity of the nanocomposites. Nyquist plots and equivalent circuitmodeling are used to extract the bulk resistance, which is in turn used to calculate the conductivityusing self-developed fitting routines. Samples with only 1 wt% CNT content exhibit a conductivity of2.3 × 10 -8 S/m which increases more than 3 orders of magnitude with increasing the CNTs content dueto the good dispersion and more interconnected conductive network within the HDPE matrix.
机译：我们提出了一种简单的两步法来制备多壁碳纳米管/高密度聚乙烯（MWCNT / HDPE）纳米复合材料的大型均匀片材。通过短时间热压，将通过溶液混合制得的片状纳米复合物的碎片熔化成均匀的大片。使用该方法制备了CNT含量为1、2和3 wt％的纳米复合材料样品，并使用SEM，XRD和阻抗谱进行了表征。制备的纳米复合材料的SEM图像说明了CNT在PE结晶薄片之间的均匀分散。 XPE结果分析显示，由于其成核作用，HDPE基质的结晶度随CNT含量的增加而增加。阻抗谱用于确定纳米复合材料的电导率。奈奎斯特图和等效电路模型用于提取体电阻，然后使用自行开发的拟合例程来计算电导率。 CNT含量仅为1 wt％的样品显示出2.3×10 -8 S / m的电导率，这归因于HDPE基质内良好的分散性和更互连的导电网络，随着CNTs含量的增加，电导率增加了3个数量级。

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