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N 2 –H 2 plasma functionalization of carbon fiber fabric for polyaniline grafting
Author(s) -
Ceregatti Thayara,
Kunicki Lucas,
Biaggio Sonia R.,
Fontana Luis C.,
Dalmolin Carla
Publication year - 2020
Publication title -
plasma processes and polymers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.644
H-Index - 74
eISSN - 1612-8869
pISSN - 1612-8850
DOI - 10.1002/ppap.201900166
Subject(s) - materials science , polyaniline , cyclic voltammetry , surface modification , raman spectroscopy , scanning electron microscope , dielectric spectroscopy , fiber , electrode , electrochemistry , grafting , chemical engineering , composite material , chemistry , polymer , polymerization , physics , optics , engineering
Carbon fiber fabric was treated with radiofrequency plasma in a N 2 /H 2 gas mixture to create functional groups with –NH x 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.