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

Jérémie Audoit (1) , Lydia Laffont-Dantras (1) , Antoine Lonjon (1) , Eric Dantras (1) , Colette Lacabanne (1)

1 CIRIMAT - Centre interuniversitaire de recherche et d'ingenierie des matériaux

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.%.

Mots clés: Silver microplates; Polymer matrix; Conductive nanocomposites; Electrical bulk percolation; Electrical surface percolation; 2D/3D percolation

Domaines: Polymères; Physique [physics]

Jérémie Audoit, Lydia Laffont-Dantras, Antoine Lonjon, Eric Dantras, Colette Lacabanne. Percolative silver nanoplates/PVDF nanocomposites: Bulk and surface electrical conduction. Polymer, 2015, vol. 78, pp. 104-110. ⟨10.1016/j.polymer.2015.09.062⟩. ⟨hal-01308066⟩