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Baqiyatallah University of Medical Sciences

Comparison of pristine and polyaniline-grafted MWCNTs as conductive sensor elements for phase change materials: Thermal conductivity trend analysis

(2017) Comparison of pristine and polyaniline-grafted MWCNTs as conductive sensor elements for phase change materials: Thermal conductivity trend analysis. Journal of Applied Polymer Science. p. 10. ISSN 0021-8995

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Abstract

Phase change materials (PCMs) function based on latent heat stored on or released from a substance over a slim temperature range. Multiwalled carbon nanotubes (MWCNTs) and polyaniline are important elements in sensor devices. In this work, pristine and polyaniline-grafted MWCNTs (PANI-g-MWCNTs) were applied as conductive carbon-based fillers to make PCMs based on paraffin. The attachment of PANI to the surface of MWCNTs was proved by Fourier transform Infrared analysis. Dispersion of MWCNTs in paraffin was studied by wide-angle X-ray scattering. Heating and solidification of PCM nanocomposites were investigated by differential scanning calorimetry, while variation in nanostructure of PCMs during heating/solidification process was evaluated by rheological measurements. It was found that after 30 min of sonication, the samples filled with 1 wt MWCNTs have melting and solidification temperatures of 29 and 42 degrees C, respectively. It was also found that PANI attachment to MWCNTs significantly changes thermal conductivity behavior of PCM nanocomposites. The developed MWCNTs-based sensor elements responded sharply at low MWCNTs content, and experienced an almost steady trend in conductivity at higher contents, while PANI-g-MWCNTs sensor followed an inverse trend. This contradictory behavior brought insight for understanding the response of PCMs against thermal fluctuations. (c) 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 45389.

Item Type: Article
Keywords: conductive polymer MWCNTs PCM nanocomposites thermal conductivity multiwalled carbon nanotubes tube heat-exchanger energy-storage polymer composites paraffin wax pcm nanoparticles performance suspensions matrix Polymer Science
Divisions:
Page Range: p. 10
Journal or Publication Title: Journal of Applied Polymer Science
Journal Index: ISI
Volume: 134
Number: 47
Identification Number: https://doi.org/10.1002/app.45389
ISSN: 0021-8995
Depositing User: مهندس مهدی شریفی
URI: http://eprints.bmsu.ac.ir/id/eprint/4076

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