Article pubs.acs.org/JPCC
Vertically Aligned Carbon Nanotube Arrays on SiC Microplatelets: A High Figure-of-Merit Strategy for Achieving Large Dielectric Constant and Low Loss in Polymer Composites Jinkai Yuan,† Shenghong Yao,‡,§ Weilong Li,†,∥ Alain Sylvestre,‡,§ and Jinbo Bai*,† †
Laboratoire de Mécanique des Sols, Structures et Matériaux, CNRS UMR8579, PRES UniverSud, Ecole Centrale Paris, Grande Voie des Vignes, 92290 Châtenay-Malabry Cedex, France ‡ Univ. Grenoble Alpes, G2Elab, F-38000 Grenoble, France § CNRS, G2Elab, F-38000 Grenoble, France ∥ Institute of Photonics & Photon-Technology, Northwest University, Xi’an 710069, P. R. China ABSTRACT: Inclusion of conducting nanoparticles into polymer could result in a nonpercolated nanocomposite with largely improved dielectric constant. But the challenge always relies on lowering dielectric loss near percolation by rationally designing composite microstructure. Herein, we report a general strategy for dielectric constant enhancement employing vertically aligned carbon nanotube (CNT) arrays as filler. The CNT arrays are well distributed into poly(vinylidene fluoride) matrix with the help of SiC microplatelet support. They can naturally form effective microcapacitors in series to store charges and thus afford a dielectric constant of hundreds times higher than the virgin polymer yet maintain the loss tangent at low levels (
