Abstract
Here is concise description of in situ prepared polyaniline and its nanocomposite with multi-walled carbon nanotubes followed by sulfonation. Thus, prepared materials were characterized by Fourier transform infrared spectroscopy, X-ray diffraction analysis, field emission scanning electron microscopy and electro-thermal analysis. Incorporation of ultrasonicated multi-walled carbon nanotubes significantly increased the electrical conductivity due to π–π interaction of polyaniline with multi-walled carbon nanotubes and its back to back sulfonation further rendered fortification. Finally, as-prepared nanocomposite showed greater electrical conductivity as well as improved thermal stability in terms of DC electrical conductivity retention under isothermal and cyclic aging conditions.
Highlights
The publication flood over 150 years old polyaniline and about 35 years aged rapidly rising carbon nanotubes [1, 2] shows, how they have matured over the past years with a very broad spectrum and wide ranging from engineering and technological fields to their commercial and economical aspects till date
Various approaches followed to date are hydrothermal method [13], microwave-enhanced chemical modification [14], indirect chemical modifications [15], etc. which set in functional moieties like –SO3H, –COOH, etc. on multi-walled carbon nanotubes (MWCNTs) and generally at elevated temperature
On treating the emeraldine base (EB) form of Pani and Pani/ MWCNTs with sulfuric acid, a dark green free flowing powder was obtained after filtration, washing and drying
Summary
The publication flood over 150 years old polyaniline and about 35 years aged rapidly rising carbon nanotubes [1, 2] shows, how they have matured over the past years with a very broad spectrum and wide ranging from engineering and technological fields to their commercial and economical aspects till date. Pani(EB) was prepared by simple oxidative polymerization and Pani(EB)/MWCNTs nanocomposite was prepared same way by the additional use of MWCNTs. Some portion of these in situ products was converted to emeraldine salt (ES) form and a portion of it was treated with 1 M H 2SO4 at ice temperature. Surface morphologies of Pani(EB), Pani(EB)/MWCNTs nanocomposite and their H2SO4-treated products are shown in Fig. 6 at different magnifications.
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