Authors: R J Sengwa Sonu Sankhla Shobhna Choudhary
Publish Date: 2009/06/26
Volume: 287, Issue: 9, Pages: 1013-1024
Abstract
The relative complex dielectric function electric modulus alternating current ac electrical conductivity and complex impedance spectra of polyethylene oxide PEO–montmorillonite MMT clay aqueous colloidal suspension hydrocolloids were investigated over the frequency range 20 Hz to 1 MHz at 27 °C The relaxation time corresponding to electrode polarisation and Maxwell–Wagner polarisation processes ionic conduction were determined from these plots The direct current dc electrical conductivity is evaluated from the fitting of real part ac conductivity data to the Jonscher power law A correlation of increase in dc conductivity and decrease of ionic conduction relaxation time with increase of clay concentration is discussed considering intercalation of PEO chains and its dynamics and exfoliation of MMT clay nanoplatelets in these complex fluids The formation of PEO–MMT clay supramolecular lamellar nanostructures with increase in continuity of lamellae arrangements were explored for the structural conformation of these nanocomposite novel materialsAuthors are grateful to the Department of Science and Technology New Delhi for providing the experimental facilities through project No SR/S2/CMP09/2002 One of the authors SS is grateful to the CSIR New Delhi for providing the RA Fellowship and SC is thankful to the University Grants Commission New Delhi for the award of RFSMS fellowship
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