In-situ synthesis and characterization of electrically conductive polypyrrole/graphene nanocomposites
In-situ synthesis and characterization of electrically conductive polypyrrole/graphene nanocomposites
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DOI：
10.1016/j.polymer.2010.10.014
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发表时间：
2010-11-26
期刊：
影响因子：
4.6
通讯作者：
Lee, Joong Hee
中科院分区：
文献类型：
--
作者：
Bose, Saswata;Kuila, Tapas;Lee, Joong Hee
以氧化石墨（GO）和吡咯单体为原料，通过原位聚合，再用一水合肼进行化学还原，制备了聚吡咯/石墨烯纳米复合材料。原位生成的石墨烯的大表面积和高纵横比在化学还原制备的复合材料的电导率显著提高方面发挥了重要作用。x射线光电子能谱（XPS）分析显示氧化石墨烯还原后表面氧官能团被去除，并通过FTIR和拉曼光谱分析进一步确定了还原后复合材料的键合结构。对于PPy/GR复合材料，D波段和G波段的强度比较高（近似为1.17），表明在还原过程中形成的c-sp(2)结构域数量增加。还观察到还原性复合材料的热稳定性得到了合理的改善。透射电镜（TEM）观察表明石墨烯纳米片在PPy基体内分散。(C) 2010 Elsevier Ltd.版权所有。
Polypyrrole (PPy)/graphene (GR) nanocomposites were successfully prepared via in-situ polymerization of graphite oxide (GO) and pyrrole monomer followed by chemical reduction using hydrazine monohydrate. The large surface area and high aspect ratio of the in-situ generated graphene played an important role in justifying the noticeable improvements in electrical conductivity of the prepared composites via chemical reduction. X-ray photoelectron spectroscopy (XPS) analysis revealed the removal of oxygen functionality from the GO surface after reduction and the bonding structure of the reduced composites were further determined from FTIR and Raman spectroscopic analysis. For PPy/GR composite, intensity ratio between D band and G band was high (similar to 1.17), indicating an increased number of c-sp(2) domains that were formed during the reduction process. A reasonable improvement in thermal stability of the reduced composite was also observed. Transmission electron microscopy (TEM) observations indicated the dispersion of the graphene nanosheets within the PPy matrix. (C) 2010 Elsevier Ltd. All rights reserved.