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Low‐cost conductive films based on graphite and cellulose acetate as promising electroanalytical platforms
Author(s) -
Paixão Guilherme A.,
Souza Thaís G.,
Pradela Filho Lauro A.,
Ferreira Marcos V.,
Takeuchi Regina M.,
Assunção Rosana M. N.,
Kikuti Elaine
Publication year - 2021
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/pat.5391
Subject(s) - materials science , graphite , cellulose acetate , chemical engineering , cellulose , desorption , adsorption , composite number , cyclic voltammetry , electrochemistry , crystallization , electrode , composite material , organic chemistry , chemistry , engineering
Conducting films were produced by incorporating 35, 50, and 60 wt.%. of graphite in cellulose acetate. The graphite contents showed to be of pivotal importance to the properties of the materials, mainly on the electrochemical performance. Thermal analyses indicated the graphite hinders the crystallization process of cellulose acetate and increases the hydrophobicity of the films. Scanning electron microscopy provided evidence of laminated graphite structures well‐dispersed in the polymeric matrix and exhibited a more porous aspect surface for the 50% G/Composite, which led to a higher surface area obtained by the N 2 adsorption/desorption technique. This composite also had a better electrochemical response for ferrocyanide ion. The fabrication method was reproducible, which was associated with the structural uniformity of the resulting material. In addition, the conductive films are ready to use after production, precluding the need for any surface pretreatment. Moreover, the proposed sensor showed analytical potentiality for dopamine and hydroquinone determination, extending the possibilities for new electroanalytical applications.