Improved power factor of polyaniline nanocomposites with exfoliated graphene nanoplatelets (GNPs)
Improved power factor of polyaniline nanocomposites with exfoliated graphene nanoplatelets (GNPs)
复制标题
DOI：
10.1039/c3ta12105d
复制
发表时间：
2013-01-01
影响因子：
11.9
通讯作者：
Martin-Gonzalez, Marisol
中科院分区：
文献类型：
--
作者：
Abad, Begona;Alda, Irene;Martin-Gonzalez, Marisol
在这项工作中，剥离的石墨烯纳米片（GNP）/聚苯胺（PANI）纳米复合材料已经通过顺序处理制备，包括：（i）在酸性条件下的第一苯胺氧化聚合步骤和（ii）以不同百分比与GNP机械共混。热电颗粒的混合材料已获得在适当的圆形几何形状通过冷压。热电参数已确定在室温下（电导率，塞贝克系数和热导率）。热电测量表明，在两个电导率和塞贝克系数与GNP的加入急剧增强。一个值得尊敬的最大功率因数值为14 μ W m（-1）K-2的混合材料达到50重量%的GNP含量，证明了1000倍的增强相对于原聚苯胺聚合物。所测量的热导率在纯PANI的0.5W m（-1）K-1至50wt%GNP含量的3.3W m（-1）K-1的范围内，这与该纳米复合材料的并联热阻模型相匹配。
In this work, exfoliated graphene nanoplatelets (GNPs)/polyaniline (PANI) nanocomposites have been prepared by sequential processing comprising: (i) a first aniline oxidative polymerization step under acidic conditions and (ii) mechanical blending with GNPs at different percentages. Thermoelectric pellets of the hybrid materials have been obtained at suitable circular geometry by means of cold pressing. Thermoelectric parameters have been determined at room temperature (electrical conductivity, Seebeck coefficient and thermal conductivity). Thermoelectric measurements show a drastic enhancement in both electrical conductivity and Seebeck coefficient with the addition of GNPs. A respectable maximum power factor value of 14 mu W m(-1) K-2 is reached for hybrid materials charged at 50 wt% GNP content, evidencing a 1000-fold enhancement with respect to the raw PANI polymer. The measured thermal conductivity is in the range of 0.5 W m(-1) K-1 for pure PANI to 3.3 W m(-1) K-1 for 50 wt% GNP content, which matches the parallel thermal resistor model for this nanocomposite.