Graphene Nanoplatelet and Multiwalled Carbon Nanotube Doping Effect on the Structural and Physical Properties of PolyVinyl Alcohol Composites

Polyvinyl alcohol (PVA) composite thin films were prepared using graphene nanoplatelets (GNPs) and multiwalled carbon nanotubes (MWCNTs) as carbon fillers (CFs). The resulting electrical, optical, mechanical, and structural changes caused by adding the CFs to the pure PVA matrix were characterized....

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Bibliographic Details
Published in:Journal of macromolecular science. Physics 2024-03, Vol.63 (3), p.161-184
Main Authors: Mergen, Ömer Bahadır, Arda, Ertan, Akın Evingür, Gülşen, Kurtuluş Öztürk, Özgül, Pietsch, Ullrich
Format: Article
Language:English
Subjects:
Carbon
Composite materials
Crystallinity
Degree of crystallinity
Electrical conductivity
Electrical resistivity
Graphene
Mechanical properties
Multi wall carbon nanotubes
Nanotechnology
Nanotubes
optical percolation
Optical properties
Percolation
Percolation theory
Physical properties
Platelets (materials)
poly (vinyl alcohol) composites
Polyvinyl alcohol
Thin films
X-ray diffraction
XRD profiles
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Summary:Polyvinyl alcohol (PVA) composite thin films were prepared using graphene nanoplatelets (GNPs) and multiwalled carbon nanotubes (MWCNTs) as carbon fillers (CFs). The resulting electrical, optical, mechanical, and structural changes caused by adding the CFs to the pure PVA matrix were characterized. The improvement of electrical, optical, and mechanical properties was interpreted in terms of the percolation theory. Depending on this interpretation, the percolation threshold values, and the critical exponential values of the related properties were calculated. It turns out that the measured mechanical and optical changes were compatible with the site percolation theory while the electrical conductivity was compatible with the classical percolation theory. X-ray diffraction (XRD) measurements were performed to correlate the physical properties with the structure of the PVA composite films. They revealed that the degree of crystallinity of the composites increased with the CF reinforcement and that MWCNT was more effective in improvement of the crystallinity of the PVA composites than GNP.
ISSN:0022-2348
1525-609X
DOI:10.1080/00222348.2023.2257555