College of Chemistry, Sichuan University , Chengdu 610065, China.
Research Center of Laser Fusion, China Academy of Engineering Physics , P.O. Box 919-987, Mianyang 621900, China.
ACS Appl Mater Interfaces. 2017 Jun 14;9(23):20124-20131. doi: 10.1021/acsami.7b05357. Epub 2017 May 31.
Polypyrrole/Graphene/Polyaniline (PPy/GNs/PANi) ternary nanocomposite with high thermoelectric power factor has been successfully prepared through the combination of in situ polymerization and solution process. FTIR, Raman spectra, XRD, and SEM analyses show the strong π-π interactions existed among PPy, GNs, and PANi, leading to the formation of more ordered regions in the composite. Both the in situ polymerization and solution process can enhance the dispersion homogeneity of graphene in the polymer matrix, bringing about increased nanointerfaces in the PPy/GNs/PANi composite. The thermoelectric properties of Polypyrrole/Graphene (PPy/GNs), Polyaniline/Graphene (PANi/GNs), and PPy/GNs/PANi composites are measured at different temperatures after being cold pressed. Consequently, the PPy/GNs/PANi composite with 32 wt % graphene demonstrates optimal electrical conductivity, Seebeck coefficient and extremely high power factor of up to 52.5 μ W m K, which is almost 1.6 × 10 times, 1.4 × 10 times, 2.7 times, and 3.6 times higher than those of the pure PANi, pure PPy, PPy/GNs composite, and PANi/GNs composite, respectively.
通过原位聚合和溶液处理相结合的方法成功制备了具有高热热电功率因子的聚吡咯/石墨烯/聚苯胺（PPy/GNs/PANi）三元纳米复合材料。FTIR、拉曼光谱、XRD 和 SEM 分析表明，PPy、GNs 和 PANi 之间存在强烈的π-π相互作用，导致复合材料中形成更多有序区域。原位聚合和溶液处理都可以增强石墨烯在聚合物基体中的分散均匀性，从而在 PPy/GNs/PANi 复合材料中增加纳米界面。在冷压后，测量了不同温度下聚吡咯/石墨烯（PPy/GNs）、聚苯胺/石墨烯（PANi/GNs）和 PPy/GNs/PANi 复合材料的热电性能。结果表明，在 32wt%石墨烯的 PPy/GNs/PANi 复合材料中，电导率、Seebeck 系数和功率因子高达 52.5 μW m K，分别是纯 PANi、纯 PPy、PPy/GNs 复合材料和 PANi/GNs 复合材料的 1.6 倍、1.4 倍、2.7 倍和 3.6 倍。
