Conductivity Studies on the Effect of a Nematic Liquid Crystal on Polyvinyl Alcohol-Based Electrolytes

Ahmad Zulazlan Shah Bin Zulkifli; Muhammad Akmal Bin Kamarudin; Azizah Binti Mainal; Suhana Binti Mohd Said

doi:10.4028/www.scientific.net/AMR.895.142

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 895Conductivity Studies on the Effect of a Nematic...

Conductivity Studies on the Effect of a Nematic Liquid Crystal on Polyvinyl Alcohol-Based Electrolytes

Abstract:

Recently, a few studies have shown that the introduction of liquid crystals (LCs) in polymer electrolytes would lead to an increase in the chain mobility and the ionic conductivity. It is believed that this enhancement of the polymer electrolyte performance is greatly influenced by the order parameter of the liquid crystal in this system. In this study, a deuterated 4-pentyl-4-cyano-biphenyl (5CB-d₂) nematic liquid crystal-doped polyvinyl alcohol (PVA) polymer electrolyte were prepared. The orientational order of the nematic liquid crystal is then investigated via the quadrupolar splittings of the deuterium Nuclear Magnetic Resonance (NMR) spectra. The quadrapolar splitting, which is directly related to the orientational order of the liquid crystal director, was measured and compared between the embedded 5CB-d₂in the PVA electrolyte to that of the pure 5CB-d₂. The conductivity of a 5CB-d₂ embedded in PVA reached up to 3.28x10^-1 S/cm compare to that of without 5CB-d₂ which is only 2.89x10^-1S/cm. The presence of 5CB-d₂ in the PVA polymer electrolyte improved the electrical conductivity of the mixture through an improved charge transfer mechanism, which improves its electrical properties, a criterion useful for a device that needs high conductivity.

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Advanced Materials Research (Volume 895)

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142-146

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https://doi.org/10.4028/www.scientific.net/AMR.895.142

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Online since:

February 2014

Authors:

Ahmad Zulazlan Shah Bin Zulkifli, Muhammad Akmal Bin Kamarudin, Azizah Binti Mainal, Suhana Binti Mohd Said

Keywords:

Nematic Liquid Crystal, Nuclear Magnetic Resonance, Polymer Electrolyte

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