Ultra‐high dielectric constant of poly(vinylidene fluoride) composites filled with hydroxyl modified graphite powders
Source abstract
Abstract
We provide a one‐step hydrothermal reaction to modify graphite powders (GPs) and prepare hydroxyl modified GPs/poly(vinylidene fluoride) (PVDF) composites which have excellent dielectric properties using high conductivity, low cost GPs as raw material. Fourier transform infrared spectroscopy (FT‐IR) and X‐ray photoelectron spectroscopy (XPS) showed that hydroxyl groups had been introduced to the surface of GPs. Scanning electron microscopy (SEM) showed that the hydroxyl modified GPs had better dispersion in the polymer matrix than the GPs. An ultra‐high dielectric constant of more than 5.1 × 103 (dielectric loss is about 3.0) was obtained for the hydroxyl modified GPs/PVDF near the percolation threshold at 1 kHz. The hydroxyl modified GPs/PVDF composites exhibited better dielectric properties than most carbon/polymer composites. POLYM. COMPOS., 37:327–333, 2016. © 2014 Society of Plastics Engineers
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Research context
OpenAlex topics: Dielectric materials and actuators · Advanced Sensor and Energy Harvesting Materials · Electromagnetic wave absorption materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
State Key Laboratory of Heavy Oil Processing China University of Petroleum Qingdao 266580 Shandong People's Republic of China
College of Science China University of Petroleum Qingdao 266580 Shandong People's Republic of China
Funding
Natural Science Foundation of China · Taishan Scholar Foundation · Fundamental Research Funds for the Central Universities · Qingdao Science and Technology Program
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