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Percolative silver nanoplates/PVDF nanocomposites: Bulk and surface electrical conduction

Abstract : Electrically conductive polymer composites have been elaborated by dispersing silver microplates into a polyvinylidene fluoride (PVDF) matrix. Silver microplates have been successfully synthesized. Their mean lateral length is about 1.15 mm, presenting a moderate aspect ratio (12e25). Synthesis is easily controlled and can produce 1e500 mg depending on the volume and the concentration of the solutions used. Electrical bulk and surface conductivity of the composites containing different filler fractions (4e20 vol.%) have been determined for each sample. Electrical percolation has been observed for each situation and was determined at 5.9 vol.% for bulk conductivity (through the thickness), while the value is shifted to 6.9 vol.% when surface conductivity is considered. The gap between the two values of percolation threshold is attributed to the orientation of fillers. Bulk conductivity and surface resistivity reaches 12.9 S m�1 and 0.123 U/☐ respectively at filler fraction of 15 vol.%.
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Jérémie Audoit, Lydia Laffont-Dantras, Antoine Lonjon, Eric Dantras, Colette Lacabanne. Percolative silver nanoplates/PVDF nanocomposites: Bulk and surface electrical conduction. Polymer, Elsevier, 2015, vol. 78, pp. 104-110. ⟨10.1016/j.polymer.2015.09.062⟩. ⟨hal-01308066⟩

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