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Sensing properties of sulfonated multi-walled carbon nanotube and graphene nanocomposites with polyaniline

Here, we discuss one of the simplest approaches for chemical functionalization of in-situ prepared polyaniline (Pani) and its nanocomposites with multi-walled carbon nanotubes (MWCNT) and graphene (GN) in chlorosulphonic acid. | Journal of Science Advanced Materials and Devices 4 2019 132e142 Contents lists available at ScienceDirect Journal of Science Advanced Materials and Devices journal homepage www.elsevier.com locate jsamd Original Article Sensing properties of sulfonated multi-walled carbon nanotube and graphene nanocomposites with polyaniline Mahfoozurrahman Khan Tarique Anwer Faiz Mohammad Department of Applied Chemistry Faculty of Engineering and Technology Aligarh Muslim University Aligarh 202002 India a r t i c l e i n f o a b s t r a c t Article history Here we discuss one of the simplest approaches for chemical functionalization of in-situ prepared Received 27 September 2018 polyaniline Pani and its nanocomposites with multi-walled carbon nanotubes MWCNT and graphene Received in revised form GN in chlorosulphonic acid. The effect of polymerization and functionalization was characterized by 2 February 2019 Fourier transform infrared spectroscopy FTIR X-ray diffraction XRD analysis Field emission scanning Accepted 3 February 2019 Available online 8 February 2019 electron microscopy FESEM and electro-thermal analysis. Results also revealed the presence of p p interactions between Pani and carbon allotropes leading to the formation of charge-transfer complexes. This strong p p interaction significantly increased the resultant electrical conductivity stabilizing them Keywords In-situ polymerization as well. Further theirs back to back sulphonation in chlorosulphonic acid significantly enhanced the Pani MWCNT and Pani GN nanocomposite solubility in one way but caused a heavy loss in conductivity conversely. The thermoelectric properties of Sulphonation the as-prepared nanocomposites were investigated as a function of MWCNT and GN contents. It was Isothermal and cyclic ageing technique observed that as-prepared Pani GN nanocomposites showed a greater electrical conductivity as well as Amine identification an improved thermal stability in terms of DC electrical conductivity retention .