Fabrication and origin of asymmetric polyvinylidene fluoride-carbon nanotube/ cyanate ester materials with high dielectric constant and low dielectric loss through building double-layered structure
作者机构：College of ChemistryChemical Engineering and Materials ScienceSoochow UniversitySuzhouJiangsu 215123People’s Republic of China
出 版 物：《High Voltage》 (高电压（英文）)
年 卷 期：2017年第2卷第1期
页 面：32-38页
核心收录：
学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学]
基 金：thank National Natural Science Foundation of China(51473107) the Priority Academic Program Development of Jiangsu Higher Education Institution(PAPD) Scientific Innovation Research of College Graduate in Jiangsu Province(KYLX15_1232)for financially supporting this project
主 题：dielectric origin asymmetric
摘 要：High dielectric loss has been the biggest sticky problem for high-k conductor/polymer ***,a new asymmetric material consisting of one layer ofβ-phase poly(vinylidene fluoride)(PVDF)and another layer of carboxylated carbon nanotube(eCNT)/cyanate ester(CE)composite was fabricated,coded as PVDFx–eCNTq/CE,where x is the thickness of PVDF layer ranging from 3 to 70μm,q is the loading of eCNTs(f),taking values of 1.2 and 1.7 wt%.The influences of f and x values on dielectric properties and breakdown strengths of PVDF–eCNT/CE materials were systematically *** f is smaller than the percolation threshold(fc)of eCNT/CE(fc=1.6 wt%),the corresponding PVDF–eCNT1.2/CE materials have similar conductive and dielectric properties as eCNT1.2/CE *** ffc,all PVDF–eCNT1.7/CE materials have much lower dielectric loss than eCNT1.7/CE,while with suitable thickness of PVDF layer(70μm),PVDF–eCNT/CE materials have significantly improved dielectric constants and breakdown *** the PVDF–eCNT1.7/CE material of which the thickness of PVDF layer is 5μm,its dielectric constant at 1 Hz is 1699,about ten times of that of eCNT1.7/CE,while the dielectric loss is only 2.31×10−2 times of that of the *** origin behind was intensively studied in terms of space charge distribution.
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