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首页> 外文期刊>Journal of Applied Polymer Science >Electroconductive performance of polypyrrole/graphene nanocomposites synthesized through in situ emulsion polymerization
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Electroconductive performance of polypyrrole/graphene nanocomposites synthesized through in situ emulsion polymerization

机译：原位乳液聚合合成聚吡咯/石墨烯纳米复合材料的导电性能

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摘要

The present study demonstrates a modified in situ emulsion polymerization (EP) approach convenient for the formation of polypyrrole/graphene (PPy/GN) nanocomposites with harnessed conductivities. A series of PPy/GN nanocomposites were prepared by loading different weight percent (wt %) of GN during in situ EP of pyrrole monomer. The polymerization was carried out in the presence of dodecyl benzene sulfonic acid, which acts as an emulsifier and protonating agent. The microstructures of the nanocomposites were studied by scanning electron microscopy, transmission electron microscopy, X-ray diffraction, Fourier transform infrared, X-ray photoelectron spectroscopy, UV vis spectroscopy, Raman spectroscopy, photoluminescence spectroscopy and thermogravimetric analyses. The electrical conductivities of the nanocomposite pellets pressed at different applied pressures were determined using four probe analyzer. The electrical conductivities of the nanocomposites were considerably enhanced as compared to those of the individual PPy samples pressed at the same pressures. An enhanced conductivity of 717.06 S m(-1) was observed in the sample with 5 wt % GN loading and applied pressure of 8 tons. The results of the present study signify that the addition of GN in the PPy polymer harnesses both electrical and thermal properties of the polymer. Thus, PPy/GN nanocomposites with superior properties for various semiconductor applications can be obtained through direct loading of GN during the polymerization process. (C) 2014 Wiley Periodicals, Inc.
机译：本研究证明了一种改良的原位乳液聚合（EP）方法，可方便地形成具有导电性的聚吡咯/石墨烯（PPy / GN）纳米复合材料。通过在吡咯单体的原位EP期间加载不同重量百分比的GN来制备一系列PPy / GN纳米复合材料。聚合在十二烷基苯磺酸的存在下进行，十二烷基苯磺酸作为乳化剂和质子化剂。通过扫描电子显微镜，透射电子显微镜，X射线衍射，傅立叶变换红外光谱，X射线光电子能谱，紫外可见光谱，拉曼光谱，光致发光光谱和热重分析研究了纳米复合材料的微观结构。使用四探针分析仪确定在不同施加压力下压制的纳米复合材料小球的电导率。与在相同压力下压制的单个PPy样品相比，纳米复合材料的电导率大大提高。在5 wt％的GN负载和8吨的施加压力下，样品的电导率提高了717.06 S m（-1）。本研究的结果表明，在PPy聚合物中添加GN可同时利用聚合物的电学性质和热学性质。因此，可以通过在聚合过程中直接加载GN来获得对各种半导体应用具有优异性能的PPy / GN纳米复合材料。 （C）2014威利期刊公司

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