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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Electrocontrolled Swelling and Water Uptake of a Three-Dimensional Conducting Polypyrrole Hydrogel

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Author(s):
Antonio, Jadielson L. ; Hofler, Lajos ; Lindfors, Tom ; Cordoba de Torresi, Susana I.
Total Authors: 4
Document type: Journal article
Source: CHEMELECTROCHEM; v. 3, n. 12, p. 2146-2152, DEC 2016.
Web of Science Citations: 6
Abstract

Polypyrrole 3D hydrosponges of tubular structure were synthesized and electrochemically characterized. The Fourier transform infrared attenuated total reflection (FTIR-ATR) spectroscopy technique was employed to study the water uptake of the hydrosponges under different conditions. This technique presents several advantages over conventional swelling measurements due to its specificity that allows analyzing the kinetics of water uptake at the molecular level. In combination with mathematical modeling, FTIR-ATR spectroscopy also enables the calculation of the water diffusion coefficients in the hydrogels. The experimental setup also allows electroswelling of the hydrosponges to be studied. The results presented herein are complementary to those obtained with the electrochemical quartz crystal microbalance with dissipation (EQCM-D) technique and make it possible to determine the actual role played by water in the ionic exchange occurring in conducting polymers during their redox processes. Whereas EQCM-D shows the whole mass change in the film provoked by injection/ejection of ions and solvent molecules, FTIR-ATR spectroscopy follows water flux only, which thus allows separation of the solvent contribution. (AU)

FAPESP's process: 13/08370-1 - Kinetics study of polypyrrole hydro-sponges swelling in different aqueous media using FTIR-ATR technique
Grantee:Jadielson Lucas da Silva Antonio
Support Opportunities: Scholarships abroad - Research Internship - Doctorate (Direct)
FAPESP's process: 10/17511-0 - Conducting polymers hydrogels with potential applications for removing heavy metals from water and soils
Grantee:Jadielson Lucas da Silva Antonio
Support Opportunities: Scholarships in Brazil - Doctorate (Direct)