Electrosynthesis and characterization of polypyrrole/cashew gum composite grown on gold surface in aqueous medium

Authors: CASTRO, ROMULO - Universidade Estadual Do Ceara; MONTE, RUBENIA - Universidade Estadual Do Ceara; MENDES, LUANA - University Of Fortaleza (UNIFOR); FURTADO, ROSELAYNE - Embrapa; SILVA, ANGELO - University Of Fortaleza (UNIFOR); Biswas, Atanu; Cheng, Huai; ALVES, CARLUCIO - Universidade Estadual Do Ceara

Submitted to: International Journal of Electrochemical Science
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 10/29/2016
Publication Date: 12/12/2016
Publication URL: http://handle.nal.usda.gov/10113/5852174
Citation: Castro, R., Monte, R.S., Mendes, L.G., Furtado, R.F., Silva, A., Biswas, A., Cheng, H.N., Alves, C.R. 2016. Electrosynthesis and characterization of polypyrrole/cashew gum composite grown on gold surface in aqueous medium. International Journal of Electrochemical Science. 12:50-61. https://doi.org/10.20964/2017.01.16.
DOI: https://doi.org/10.20964/2017.01.16

Interpretive Summary: The synthesis of new products from renewable materials associated with the reduction of the usage of chemical reagents is a highly desirable goal in the future development of novel technologies. Thus, the use of biodegradable materials in electronics can reduce the accumulation of persistent solid waste and mitigate serious environmental concerns. One of the important materials in electronics is the conducting polymer. It will be helpful to develop new conducting materials from agri-based raw materials. In this work, a novel composite from cashew gum and polypyrrole was made via electrochemical methods. The composite products were characterized by FTIR-ATR, AFM, SEM, and electrochemical techniques. Chemical and structural modifications can be made that are related to the variations in oxidation levels. The change that occurs in the charge mobility of the polymer can be easily measured. Impact: We have developed a novel conductive biobased film from electrodeposition of polypyrrole/cashew gum. The use of biodegradable materials in electronics can reduce the accumulation of persistent solid waste and mitigate serious environmental concerns.

Technical Abstract: Electronic systems consisting of renewable, biodegradable materials and minimum amounts of toxic materials are desirable. This study was carried out to investigate the electrosynthesis and evaluation of the electrochemical, morphological, and topographical characteristics of a novel conducting polypyrrole/cashew gum (PPy/CG) composite material. Composites were grown on a gold surface by electrochemical methods including cyclic voltammetry and chronoamperometry in aqueous medium. The films were characterized by using FTIR-ATR, SEM, AFM, and cyclic voltammetry techniques. The composites showed the incorporation of CG in PPy film, and that they had globular and nodular morphology with grains ranging from 0.7 to 2.0 µm. Moreover, the films produced by cyclic voltammetry and chronoamperometry presented an anodic load of 3.83 and 4.34 mC, respectively. The surface roughness parameters showed that the polypyrrole surface is strongly affected by the CG concentration. This study contributed to the development of an alternative conductive biobased film from electrodeposition of PPy/CG and gave useful information about its structural and electrochemical properties.