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. 2019 Feb 7;11(2):278.
doi: 10.3390/polym11020278.

Preparation and Thermoelectric Properties Study of Bipyridine-Containing Polyfluorene Derivative/SWCNT Composites

Chengjun Pan  1 , Luhai Wang  2 , Wenqiao Zhou  3 , Lirong Cai  4 , Dexun Xie  5   6 , Zhongming Chen  7 , Lei Wang  8
Affiliations

Preparation and Thermoelectric Properties Study of Bipyridine-Containing Polyfluorene Derivative/SWCNT Composites

Chengjun Pan et al. Polymers (Basel). .

Abstract

Polymer/inorganic thermoelectric composites have witnessed rapid progress in recent years, but most of the studies have focused on the traditional conducting polymers. The limited structures of traditional conducting polymers restrain the development of organic thermoelectric composites. Herein, we report the preparation and thermoelectric properties of a series of composites films based on SWCNTs and bipyridine-containing polyfluorene derivatives. The value of the power factor around 12 μW m-1 K-2 was achieved for the composite F8bpy/SWCNTs with a mass ratio of 50/50, and the maximum value of 62.3 μW m-1 K-2 was obtained when the mass ratio reached 10/90. Moreover, taking advantage of the bipyridine unit could chelate various kinds of metal ions to form polymer complexes. The enhanced power factor of 87.3 μW m-1 K-2 was obtained for composite F8bpy-Ni/SWCNTs with a mass ratio of 50/50. Finally, the thermoelectric properties of the bipyridine-containing polyfluorene derivative/SWCNT composites were conveniently tuned by chelating with different metal ions.

Keywords: SWCNTs; bipyridine; composites; organic thermoelectric; transition metal complex.

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Conflict of interest statement

The authors declare no conflict of interest.

Figures

Figure 1
Figure 1
Synthesis of F8bpy (a), and schematic illustration showing the preparation process of the F8bpy or F8bpy/metal complex/SWCNT nanocomposites (b).
Figure 2
Figure 2
SEM images of F8bpy/SWCNT hybrid films with different SWCNT contents: 0 (a), 10 (b), 30 (c), 50 (d), 70 (e), and 90 wt.% (f).
Figure 3
Figure 3
UV-vis absorption spectra of F8bpy/metal complex in chlorobenzene.
Figure 4
Figure 4
Energy dispersive X-ray spectroscopy (EDS) images of F8bpy/metal/SWCNT composites films with different transition metal ions.
Figure 5
Figure 5
Electrical conductivities, Seebeck coefficients, and power factors at room temperature for the pure F8bpy/SWCNT composite films and pure SWCNT film.
Figure 6
Figure 6
Thermoelectric properties of F8bpy/metal complex/SWCNT composite films with different transition metal ions (SWCNT 50 wt.%).
See this image and copyright information in PMC

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