A1 Journal article (refereed), original research

Correlation between manufacturing processes and anisotropic magnetic and electromagnetic properties of carbon nanotube/polystyrene composites


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Publication Details
Authors: Makarova Tatyana, Geydt Pavel, Zakharchuk Ivan, Lähderanta Erkki, Komlev Anton, Zyrianova A.A., Kanygin M.A., Sedelnikova O.V., Suslyaev V.I., Bulusheva L.G., Okotrub A.V.
Publication year: 2016
Language: English
Related Journal or Series Information: Composites Part B: Engineering
Volume number: 91
Start page: 505
End page: 512
JUFO-Level of this publication: 2
Open Access: Not an Open Access publication

Abstract
We present an original, easy to implement, reliable method of non-destructive testing of the orientation of carbon nanotubes by magnetic moment measurements performed in three perpendicular directions of magnetic field. Multi-wall carbon nanotubes/polystyrene composites were prepared by stretching and forge-rolling methods with the same nanotube loading. Unusually strong diamagnetic anisotropy in the composites prepared by the stretching method was observed and attributed to an additional diamagnetic response from the polystyrene aromatic rings wrapping the nanotubes. Strong anisotropy of diamagnetic susceptibility of the composites with highly aligned nanotubes correlates with anisotropic electromagnetic response and with improved microwave absorption properties. Both magnetic anisotropy and microwave absorbance is considerably lower in the composites prepared by the forge-rolled method. The magnetic results correlate well with polarized Raman spectroscopy. The research findings contribute to a better understanding of nanotube-polymer interface, alignment mechanisms, and ultimately the optimal design and performance of functional nanotube - aromatic polymer nanocomposites.

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Last updated on 2018-19-10 at 08:49