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Sayah, Zakaria Bekkar Djelloul
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Publications (4/4 displayed)
- 2023Enhanced thermoelectric power factor of PPy-based nanocomposites: Effect of decorated graphene nanoplatelets by bismuth oxide nanoparticlescitations
- 2022Effect of MWCNTs surface functionalization group nature on the thermoelectric power factor of PPy/MWCNTs nanocompositescitations
- 2022Influence of graphene oxide surface treatment by diazonium salts on thermoelectrical behavior of polypyrrole-based compositescitations
- 2019Response Surface Methodology as a Powerful Tool for the Synthesis of Polypyrrole-Doped Organic Sulfonic Acid and the Optimization of its Thermoelectric Propertiescitations
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article
Effect of MWCNTs surface functionalization group nature on the thermoelectric power factor of PPy/MWCNTs nanocomposites
Abstract
This work aims to put forward the role of multiwalled carbon nanotubes (MWCNTs) surface functionalization on the enhancement of thermoelectric (TE) power factor of new nanocomposite-based polypyrrole/surface modified multiwalled carbon nanotubes (PPy/MWCNTs), prepared by a facile in-situ oxidative polymerization process. In fact, MWCNTs’ content was fixed to ∼11 wt%, and their surfaces were respectively modified with different functional groups (benzoic acid (-D1), benzene tricarboxylic acid (-D3), -O, -COOH, -NH2 and -SH). After running all the required, spectral, structural, morphological, and thermoelectrical characterizations, it is revealed that the nanocomposites-based functionalized MWCNTs remarkably increase the Seebeck coefficient, and thus enhancing the material’s power factor. This improvement of TE power factor was attributed to the coating homogeneity and the good interaction between PPy and MWCNTs mainly through π–π stacking between the polymer chains and the nanotubes as well as electrostatic, hydrogen bonding, and electrons donor/acceptor groups interactions due to the functional groups grafted on the nanotube’s sidewall. The highest power factor value (0.51 μWm−1K−2) was obtained with PPy/MWCNTs-SH, which means an enhancement of 8 folds compared to pure PPy. Considering the content of MWCNTs and the ease of preparation process, these results might help to develop future TE materials and devices.