Effect of carbon nanotube pre-treatment on dispersion and electrical properties of melt mixed multi-walled carbon nanotubes / poly(methyl methacrylate) composites
Effect of carbon nanotube pre-treatment on dispersion and electrical properties of melt mixed multi-walled carbon nanotubes / poly(methyl methacrylate) composites
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DOI：
10.1007/bf03219053
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发表时间：
2005-06
影响因子：
2.4
通讯作者：
W. Park;Jung Hyun Kim;Sang-Soo Lee;Junkyung Kim;G. Lee;Min Park
中科院分区：
文献类型：
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作者：
W. Park;Jung Hyun Kim;Sang-Soo Lee;Junkyung Kim;G. Lee;Min Park
使用双螺杆挤出机将经过浓混合酸预处理或高温氧化的多壁碳纳米管（MWNT）与聚甲基丙烯酸甲酯（PMMA）熔融混合。研究了MWNT/PMMA复合材料的形貌和电性能。热处理的MWNT（t-MWNT）分散良好，而酸处理的MWNT（a-MWNT）高度缠结，形成大尺寸的簇。根据碳纳米管（CNT）分散度分析了复合材料的电性能。实验渗透阈值估计为 t-MWNT 的 3 wt%，但由于 a-MWNT 复合材料中的分散性较差，在类似浓度下没有发生渗透。
Multi-walled carbon nanotubes (MWNTs) pre-treated by concentrated mixed acid or oxidized at high temperature were melt mixed with poly(methyl methacrylate) (PMMA) using a twin screw extruder. The morphologies and electrical properties of the MWNT/PMMA composites were investigated. The thermally treated MWNTs (t-MWNTs) were well dispersed, whereas the acid treated MWNTs (a-MWNTs) were highly entangled, forming large-sized clusters. The resulting electrical properties of the composites were analyzed in terms of the carbon nanotube (CNT) dispersion. The experimental percolation threshold was estimated to be 3 wt% of t-MWNTs, but no percolation occurred at similar concentrations in the a-MWNT composites, due to the poor dispersion in the matrix.