N2–H2 plasma functionalization of carbon fiber fabric for polyaniline grafting

• Main Author: Ceregatti T.*
• Publication Date: 2020
• Other Authors: Kunicki L.*, Biaggio S.R., Fontana, Luis Cesar, Dalmolin, Carla
• Format: Article
• Language: eng
• Source: Repositório Institucional da Udesc
• dARK ID: ark:/33523/001300000v8c8
• Download full: https://repositorio.udesc.br/handle/UDESC/4550

© 2020 WILEY-VCH Verlag GmbH & Co. KGaA, WeinheimCarbon fiber fabric was treated with radiofrequency plasma in a N2/H2 gas mixture to create functional groups with –NHx or –N, thus promoting conditions for polyaniline (PAni) grafting. The morphology and chemical structure of PAni on the carbon fiber surface were assessed by scanning electron microscopy and Raman spectroscopy, showing strong interactions between the PAni and the carbon fiber, especially for the 5-min plasma-treated substrate. The electrochemical activity of electrodes consisting of carbon fiber fabric and PAni was evaluated by cyclic voltammetry and electrochemical impedance spectroscopy, which showed fast polarization response and lower charge transfer resistance for electrodes with better interactions between the PAni and the carbon fiber substrate, indicating the occurrence of grafting.