Characterization of conductive multiwall carbon nanotube/polystyrene composites prepared by latex technology
Characterization of conductive multiwall carbon nanotube/polystyrene composites prepared by latex technology
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DOI：
10.1016/j.carbon.2007.10.005
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发表时间：
2007-12
期刊：
影响因子：
10.9
通讯作者：
Junrong Yu;K. Lu;E. Sourty;N. Grossiord;C. Koning;J. Loos
中科院分区：
文献类型：
--
作者：
Junrong Yu;K. Lu;E. Sourty;N. Grossiord;C. Koning;J. Loos
基于乳胶技术制备导电多壁碳纳米管/聚苯乙烯（MWCNT/PS）复合材料。首先将多壁碳纳米管分散在超声驱动的十二烷基硫酸钠 (SDS) 水溶液中，然后与不同量的 PS 乳胶混合。通过冷冻干燥和压缩成型从这些混合物中制备 MWCNT/PS 复合材料。通过 UV-vis、透射电子显微镜、电子断层扫描和扫描电子显微镜监测 MWCNT 在 SDS 水溶液和 PS 基质中的分散情况。当应用适当的制备条件时，多壁碳纳米管可以很好地分散并均匀地融入 PS 基质中。导电的渗透阈值约为复合材料中 MWCNT 的 1.5wt%，并且可以实现约 1Sm−1 的最大电导率。所提出的方法可以适用于其他多壁碳纳米管/聚合物乳胶系统。
Conductive multiwall carbon nanotube/polystyrene (MWCNT/PS) composites are prepared based on latex technology. MWCNTs are first dispersed in aqueous solution of sodium dodecyl sulfate (SDS) driven by sonication and then mixed with different amounts of PS latex. From these mixtures MWCNT/PS composites were prepared by freeze-drying and compression molding. The dispersion of MWCNTs in aqueous SDS solution and in the PS matrix is monitored by UV–vis, transmission electron microscopy, electron tomography and scanning electron microscopy. When applying adequate preparation conditions, MWCNTs are well dispersed and homogeneously incorporated in the PS matrix. The percolation threshold for conduction is about 1.5wt% of MWCNTs in the composites, and a maximum conductivity of about 1Sm−1can be achieved. The approach presented can be adapted to other MWCNT/polymer latex systems.