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Fabrication of conjugated triblock copolymer/single-walled carbon nanotubes composite films with enhanced thermoelectric performance
作者:Yun-Fei Zhang, Si-Ying Chen, Hui Zhang, Xin-Yue Ding, Ping Fu, Fei-Peng Du
關(guān)鍵字:Conjugated triblock copolymer, Single-walled carbon nanotubes, Composite films, Thermoelectric properties
論文來源:期刊
具體來源:Composites Communications
發(fā)表時間:2021年
Aniline tetramer-b-polyethylene glycol-b-aniline tetramer (APA), a kind of conjugated triblock copolymer, has attracted attention in the thermoelectric (TE) conversion field owing to its typical n-type property, well-defined molecular structure and excellent dissolvability. Here, APA is used as n-type dopant for tuning the TE properties of the single-walled carbon nanotubes (SWCNTs), and APA/SWCNT TE composites are fabricated by a facile solution mixing method. Scanning electronic microscopy and transmission electron microscope, X-ray photoelectron spectroscopy, X-ray diffraction, Raman spectroscopy, UV–Vis spectroscopy and thermogravimetric analysis are utilized to elucidate the morphology, elemental composition, structure and thermal stability of the composites, respectively. For one thing, APA provides enough negative charge at high temperature to convert the SWCNTs into n-type material, and a maximum Seebeck coefficient of -49.0 ± 0.3 μV/K at 125 oC for APA/SWCNT (40:100) was obtained. For another thing, HCl doping further improves the TE properties of APA/SWCNT, and the highest power factor of 106.3 μW/(m·K2) is obtained at 100 oC for APA/SWCNT (10:100). Therefore, this work provides a facile method using a new dopant APA to fabricate n-type APA/SWCNT composite with enhanced thermoelectric performance.
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