期刊
ACS APPLIED MATERIALS & INTERFACES
卷 3, 期 12, 页码 4557-4560出版社
AMER CHEMICAL SOC
DOI: 10.1021/am201454e
关键词
dielectric permittivity; carbon nanotubes; emeraldine base; core/shell structure; loss tangent; ferroelectric
资金
- NSF of China [51073015, 50977001]
- Ministry of Sciences and Technology of China [2010DFA51490]
- State Key Laboratory of Power System [SKLD091KZ03]
- Scientific Research Foundation of Graduate School of Beijing University of Chemical Technology [09Ma014]
- Fundamental Research Funds for the Central Universities [06103012, 06103011]
A comparative study of the dielectric properties of poly(vinylidene fluoride) (PVDF) based nanocomposites with pristine multiwalled carbon nanotubes (MWNTs) and surface-modified MWNTs with core/shell structure (denoted as MEB) as fillers, was reported. Compared with MWNTs/PVDF composites, the MEB/PVDF composites exhibited lower loss tangent and higher dielectric permittivity. It is suggested that the conductive/nonconducting core/shell structure of the MEB filler is the main cause of the improved dielectric properties. Percolation based MWNTs networks is in charge of the improvement of dielectric permittivity, and the nonconducting emeraldine base layer of the MEB filler supports the low loss tangent and low conductivity in the MEB/PVDF composites.
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