聚苯胺纳米复合材料室温热电性能

Thermoelectric properties of polyaniline nanocomposites at room temperature

关键词:  聚苯胺  银纳米颗粒  醇还原  热电  烧结

Key words:  polyaniline  silver nanoparticles  ethanol reducing  thermoelectric  sintering

摘要:

为提升聚苯胺基热电材料的性能,本文采用醇还原法制备了形貌规整、粒径约50 nm的银纳米颗粒(AgNPs),然后将AgNPs引入聚苯胺基体中,运用放电等离子体烧结技术制备块体材料。借助SEM、XRD、FT-IR等手段对制备的样品进行表征,并研究了AgNPs对聚苯胺材料热电性能的影响。研究表明,AgNPs的引入提升了聚苯胺基材料的热电性能,当AgNPs的复合量为25 wt.%时,所得样品的电导率在300 K时达到16.3 S/m,与复合5 wt.%的样品相比其电导率提高了83.1%。AgNPs含量为10 wt.%时,复合材料的热电优值(温度为300 K时)最大为1.34×10^-5。热电测试结果表明该聚苯胺基复合材料在热电应用方面具有一定的优势。

Abstract:

In order to enhance the thermoelectric properties of polyaniline-based materials, silver nanoparticles (AgNPs) with a uniform morphology and a particle size of approximately 50 nm were prepared by an alcohol reduction method. The AgNPs were introduced into polyaniline matrix to form bulk materials by spark plasma sintering. SEM, XRD, and FT-IR techniques were employed to characterize prepared samples, and the effects of AgNPs on the thermoelectric properties of the polyaniline materials was also investigated. The study indicates that the thermoelectric properties of the polyaniline-based materials were improved greatly after the introduction of AgNPs. When the AgNPs content was 25 wt.%, the ectrical conductivity of the obtained sample reached 16.3 S/m at 300 K, which was 83.1% higher than that of the sample with 5 wt.% AgNPs. The maximum ZT value (at 300 K) was 1.34×10^-5, when the AgNPs content was 10 wt.%. The thermoelectric testing results show that the polyaniline-based composite has certain advantages for thermoelectric applications.