Improved dielectric properties of PVDF nanocomposites: a comparative study of noncovalent and covalent functionalization of MWCNTs

被引：2
|
作者：
Xu, Pei [1 ,2 ]
Ruan, Gang [1 ,2 ]
Cui, Zhaopei [1 ,2 ]
Ding, Yunsheng [1 ,2 ]
机构：
[1] Hefei Univ Technol, Dept Polymer Sci & Engn, Sch Chem & Chem Engn, Hefei 230009, Anhui, Peoples R China
[2] Hefei Univ Technol, Anhui Key Lab Adv Funct Mat & Devices, Hefei 230009, Anhui, Peoples R China
来源：
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS | 2018年 / 29卷 / 15期
基金：
中国国家自然科学基金;
关键词：
MULTIWALLED CARBON NANOTUBES; POLYMER NANOCOMPOSITES; ENERGY DENSITY; COMPOSITES; CONSTANT; REINFORCEMENT; PERMITTIVITY; FABRICATION;
D O I：
10.1007/s10854-018-9433-1
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Polyvinylidene fluoride (PVDF) based nanocomposites with gamma-oxo-pyrenebutyric acid-noncovalent modified multiwalled carbon nanotubes (denoted as PACNTs) and stearic acid-covalent modified MWCNTs (SACNTs) as nanofillers, were fabricated using solution-blending method and their dielectric properties were carefully investigated. gamma-Oxo-pyrenebutyric acid (PA) or stearic acid (SA) can improve the dispersion of MWCNTs in PVDF matrix because of strong physical pi-pi interaction and the surface of MWCNTs grafted with SA respectively. The values of percolation threshold for PVDF/PACNTs and PVDF/SACNTs were determined to be 5.7 and 6.3 vol%, respectively. Higher dielectric permittivity and lower loss tangent of PVDF/PACNTs originates from remarkable interfacial polarization because PA have more contact area with MWCNTs and can reduce leakage current compared with SA.
引用
收藏
页码：13112 / 13117
页数：6
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