Templated growth of polyaniline on exfoliated graphene nanoplatelets (GNP) and its thermoelectric properties
Templated growth of polyaniline on exfoliated graphene nanoplatelets (GNP) and its thermoelectric properties
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DOI：
10.1016/j.polymer.2012.07.029
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发表时间：
2012-08-31
期刊：
影响因子：
4.6
通讯作者：
Drzal, Lawrence T.
中科院分区：
文献类型：
--
作者：
Xiang, Jinglei;Drzal, Lawrence T.
采用原位聚合法制备了聚苯胺（PANi）/剥离型石墨烯纳米片（GNP）纳米复合材料。由于π电子相互作用，PANi对GNP具有强亲和力，从而形成均匀的纳米原纤维涂层。通过控制真空过滤PANi修饰的GNP的水分散体来制备纸状纳米复合材料。所得纳米复合材料的塞贝克系数随溶液中苯胺的初始浓度以及PANi的质子化而变化，对于含有约40重量%的PANi的纳米复合材料，达到高达33 μ V/K，并且质子化率为0.2。GNP的存在将纳米复合材料的电导率提高到59 S/cm。结果，纳米复合材料的热电优值ZT比任一组分高2个数量级，表现出显著的协同效应。(C)2012爱思唯尔有限公司保留所有权利。
Polyaniline (PANi)/exfoliated graphene nanoplatelets (GNP) nanocomposites were prepared by in situ polymerization of aniline monomer in the presence of GNP for thermoelectric applications. PANi has a strong affinity for GNP due to pi electron interactions, forming a uniform nanofibril coating. A paper-like nanocomposite was prepared by controlled vacuum filtration of an aqueous dispersion of PANi decorated GNP. The Seebeck coefficient of the resulting nanocomposite changes with initial concentration of aniline in the solution as well as the protonation of PANi, reaching as high as 33 mu V/K for nanocomposites containing approximately 40 wt% of PANi and with a protonation ratio of 0.2. The presence of GNP improved the electrical conductivity of the nanocomposites to 59 S/cm. As a result, thermoelectric figure of merit ZT of the nanocomposites is 2 orders of magnitude higher than either of the constituents, exhibiting a significant synergistic effect. (C) 2012 Elsevier Ltd. All rights reserved.