Journal
RSC ADVANCES
Volume 6, Issue 91, Pages 88382-88391Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6ra19461c
Keywords
-
Categories
Funding
- Czech Science Foundation [13-00270S, 14-10279S]
Ask authors/readers for more resources
Polypyrrole nanotubes exhibit conductivity of tens S cm(-1) which is one of the highest among the current conducting polymers. They are thus superior to the common globular form with the conductivity of units of S cm(-1) or lower. The conductivity of both forms is reduced after treatment with alkalis but still remains high, units of S cm(-1) and 10(-2) S cm(-1), respectively. The deprotonation, which is responsible for conductivity reduction, is discussed on the basis of salt-base transition in polypyrrole. It is not fully reversible, and the reprotonation with acids recovers the conductivity only in part. The role of methyl orange, which was used to support the formation of nanotubes, is proposed to be similar to that of surfactants. FTIR and Raman spectroscopies prove that methyl orange is strongly bound to polypyrrole in its acid form, and an insertion mechanism is proposed to explain the resistance towards the deprotonation of nanotubes. The spectra also illustrate that the molecular structure of nanotubular polypyrrole is preserved even under highly alkaline conditions at a pH close to 14, where the globular form becomes damaged. Polypyrrole, especially in its nanotubular form, is of promise in applications requiring electrical conduction even under neutral or alkaline conditions, where other conducting polymers, such as polyaniline, lose their exploitable conductivity.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available