Preparation and Characterization of Polyvinylpyrrolidone/ Carboxyl Functionalized Multiwalled Carbon Nanotube Nanocomposite

Polyvinylpyrrolidone (PVP)/carboxyl functionalized multiwalled carbon nanotube (MWCNT-COOH) nanocomposite was prepared in aqueous media. The structure, morphology, and thermal characterization of PVP/MWCNT-COOH nanocomposite were done by FT-IR, SEM, TGA and DSC techniques. According to the DSC analysis, the glass transition temperature of 159 °C is observed for PVP/MWCNT-COOH (5% w/w). The addition of MWCNT-COOH (5% W/W) to PVP increases the thermal stability of PVP to 400 °C which was indicated in TGA thermogram.The FT-IR spectra showed the hydrogen bonding has been takes place between MWCNT-COOH and PVP in the PVP/MWCNT-COOH (5% w/w) nanocomposite. The SEM images of the PVP/MWCNT-COOH (5% w/w) nanocomposite clearly exhibited the presence of MWCNT-COOH in PVP polymer matrix.