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Effets des ultrasons haute fréquence sur l’électrosynthèse des polymères conducteurs

Abstract : This study deals with the effects of high frequency ultrasound (500 kHz) irradiation on the electrochemical synthesis of conducting polymers in aqueous media. Ultrasound favors electrochemical polymerization reaction by improving mass transfer of electroactive species towards the electrode. It leads to films more compact, presenting a thinner and more homogeneous topography. Chemical effects generated by the acoustic wave propagation enable a higher doping level for the films. However, their electrical conductivity is slightly reduced, due to partial degradation of polymer chains by cavitational activity. The possibility to control morphological properties was used in different applications such as potentiometric pH sensors or anti-corrosion coatings. For such applications, using these films as functional layers, the irradiated coatings lead to better results. A selective masking technique, based on focused ultrasound, has been developed as well in order to elaborate a biphased substrate permitting interesting biological applications
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Abdeslam Et Taouil. Effets des ultrasons haute fréquence sur l’électrosynthèse des polymères conducteurs. Autre. Université de Franche-Comté, 2011. Français. ⟨NNT : 2011BESA2025⟩. ⟨tel-00839877⟩

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