Activation behavior and dielectric relaxation in polyvinyl alcohol and multiwall carbon nanotube composite films

作者：Chakraborty G; Meikap A K^*; Babu R; Blau W J

来源：Solid State Communications, 2011, 151(10): 754-758.

DOI：10.1016/j.ssc.2011.03.013

• Polyvinyl alcohol
• Multi walled Carbon nanotubes
• Chemical synthesis
• Electric modulus

The dc and ac electrical transport property of Polyvinyl Alcohol-Multiwall Carbon Nanotubes (PVA-MWNT) composites has been investigated within a temperature range 77 <= T <= 300 K and in the frequency range 20Hz-1MHz. The temperature variation of dc conductivity gives the presence of two different activation energies. The dielectric properties of the samples have been explained in terms of electric modulus vector. The dielectric relaxation has been explained in terms of interfacial polarization occurring in between the insulating PVA matrix and MWNT conductive filler. The variation of the relaxation time with temperature also indicates the presence of two different activation energies.

• 出版日期2011-5