Studies on electrical conductivity of PVA/graphite oxide nanocomposites: a free volume approach

Poly(vinyl alcohol) and graphite oxide (PVA/GO) polymer nanocomposites of different GO wt% have been prepared. The decreased positron lifetime parameter viz., o-Ps lifetime (τ 3 ) at the lower concentration of GO indicates the improved interfacial interaction between the surface of GO nanoparticles...

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Bibliographic Details
Published in:Journal of polymer research 2017, Vol.24 (1), p.1-11, Article 11
Main Authors: Ningaraju, S., Ravikumar, H. B.
Format: Article
Language:English
Subjects:
Characterization and Evaluation of Materials
Chemistry
Chemistry and Materials Science
Conductivity
Current carriers
Electrical resistivity
Electron microscopy
Fourier transforms
Graphite
Industrial Chemistry/Chemical Engineering
Nanocomposites
Nanoparticles
Original Paper
Polymer Sciences
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Summary:Poly(vinyl alcohol) and graphite oxide (PVA/GO) polymer nanocomposites of different GO wt% have been prepared. The decreased positron lifetime parameter viz., o-Ps lifetime (τ 3 ) at the lower concentration of GO indicates the improved interfacial interaction between the surface of GO nanoparticles and side chain of PVA polymer matrix. This is evident from Fourier transform infrared spectroscopy (FTIR) studies. The increased o-Ps lifetime (τ 3 ) after 0.4 wt% of GO suggests the increased interfacial area at the interface of PVA and GO nanoclusters. The increased electrical conductivity at the lower concentration of GO suggests the conductivity chain formation through the nanoparticle aggregation. The decreased conductivity at higher concentration of GO indicates the reduced conducting pathways for the mobility of charge carriers. Scanning electron microscopy (SEM) studies show the random distribution of GO nanoparticles and the formation of nanoclusters in PVA matrix at the lower and higher concentrations of GO nanoparticles respectively.
ISSN:1022-9760
1572-8935
DOI:10.1007/s10965-016-1176-1