Structural and Infrared Spectroscopy of Polyvinylpyrrolidone/Multi-walled Carbon Nanotubes Nanocomposite

Shahad M Omran,Estabraq T Abdullah,Omar A Al-Zuhairi

doi:10.30723/ijp.v19i51.691

Shahad M Omran, Estabraq T Abdullah + Show 1 more

Open Access

https://doi.org/10.30723/ijp.v19i51.691

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Abstract

In this work, polyvinylpyrrolidone (PVP)/ Multi-walled carbon nanotubes (MWCNTs) nanocomposites were prepared with two concentrations of MWCNTs by casting method. Morphological, structural characteristics and electrical properties were investigated. The state of MWCNTs dispersion in a PVP matrix was indicated by Field Effect-Scanning Electron Microscopy (FESEM) which showed a uniform dispersion of MWCNTs within the PVP matrix. X-ray Diffraction (XRD) indicate strong bonding of carbonyl groups of PVP composite chains with MWCNTs. Fourier transfer infrared (FTIR) studies shows characteristics of various stretching and bending vibration bands, as well as shifts in some band locations and intensity changes in others. Hall effect was studied to test the type of charge carriers which was shown to be P-type. The electrical conductivity was shown increased for the pure PVP and pure MWCNT from (2.047×10-5) (Ω.cm)-1 and (3.683×101) (Ω.cm)-1 to (2.51×102 and 2.36×102) (Ω.cm)-1for both concentrations of nanocomposites, which indicate the conductivity was enhancement by using the carbon nanotubes.

Highlights

Carbon nanotubes (CNTs) have captivated the interest of researchers and scientists since Ijiman discovered them due to their extraordinary optical, electrical, thermal, and mechanical properties
This can be attributed to the good compatibility between the Multi-walled carbon nanotubes (MWCNTs) and the polymer chains of PVP
At the high concentration of the MWCNTs(0.005wt.%), an aggregation and local irregularities were observed which can be attributed to the MWCNTs nature

Summary

Introduction

Carbon nanotubes (CNTs) have captivated the interest of researchers and scientists since Ijiman discovered them due to their extraordinary optical, electrical, thermal, and mechanical properties. Polymer composites are most attractive to be used with carbon nanotubes since the result has many interesting properties[6,7]. Many studies have investigated the effect of MWCNTs system on the polymeric composites. The results show an enhancement in the mechanical, electrical, thermal and optical properties [10-12], and has many important applications in growing pharmaceutical, biomedical, electronic and optical applications [11, 12]. In this work, casting method was used to prepare the PVP/MWCNTs nanocomposite with two different concentrations of MWCNTs: 0.002wt% and 0.005wt%. Multi-walled carbon nanotubes (MWCNTs) have outer diameter 13-18nm with length 1-12 μm, and purity > 99 wt. % were purchased from Neutrino

Samples preparation

Results and discussion

Conclusions