Abstract
In the present work, carbon nanotubes (CNT) reinforced industrial waste fly ash -based polymer nanocomposites are fabricated. Strong interfacial bonding between CNT-fly ash and epoxy was confirmed by SEM technique. Low water absorption of about 0.17% was observed from 20 vol % CNT reinforced nanocomposite sample. However, the water absorption slightly increases with the increase of CNT contents in fly ash-based nanocomposites due to hydrophilic and polar characteristics of CNT. Flexural strength of nanocomposites increases with increase of CNT amount. The enhancement in flexural strength is attributed to the high dispersion of the CNT in epoxy polymer and weakening of Vander Walls forces. Nanocomposites sheets exhibited a high dielectric constant of 38 at 100 Hz. Dielectric constant was drastically decreased from 38 to 10 for 5% CNT filled nanocomposites. Such behavior was attributed to the conducting nature of CNT and creation of space charge distribution in polymer matrix.
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