Enhanced dielectric permittivity with retaining low loss in poly(vinylidene fluoride) by incorporating with Ag nanoparticles synthesized via hydrothermal method

2018 ◽  
Vol 446 ◽  
pp. 59-65 ◽  
Author(s):  
Nutthakritta Phromviyo ◽  
Narong Chanlek ◽  
Prasit Thongbai ◽  
Santi Maensiri
Keyword(s):  
Dielectric Permittivity ◽  
Hydrothermal Method ◽  
Ag Nanoparticles ◽  
Vinylidene Fluoride ◽  
Low Loss ◽  
Poly Vinylidene Fluoride

Graphene/poly(vinylidene fluoride) dielectric composites with polydopamine as interface layers

2017 ◽  
Vol 24 (3) ◽  
pp. 327-333 ◽  
Author(s):  
Hairong Li ◽  
Chenglong Xu ◽  
Zongyi Chen ◽  
Ming Jiang ◽  
Chuanxi Xiong
Keyword(s):  
Dielectric Permittivity ◽  
Vinylidene Fluoride ◽  
Interface Layer ◽  
Low Loss ◽  
Dielectric Characteristics ◽  
High Dielectric Permittivity ◽  
Reduced Graphene ◽  
Poly Vinylidene Fluoride ◽  
High Dielectric ◽  
Interface Layers

AbstractA poly(vinylidene fluoride) (PVDF) nanocomposite incorporated with polydopamine-coated reduced graphene oxide (rGO@PDOPA) nanosheets has been developed with high dielectric permittivity and low loss for electricity storage applications. Structural analysis indicates that PDOPA was successfully anchored onto rGOs through non-covalent linkage under mild conditions. The presence of PDOPA layer between rGO and PVDF can not only prevent the agglomeration and direct contact of original rGOs but also enhance the interaction between PVDF and rGO and microcapacitor formation. Compared to rGO/PVDF composites, higher dielectric permittivity and lower loss factor were achieved simultaneously in rGO@PDOPA/PVDF nanocomposites at low and moderate frequencies. The PDOPA interface layers are effective in modifying the dielectric characteristics of the composites to increase the dielectric permittivity without the introduction of loss mechanisms. This study demonstrates that PDOPA is an ideal interface layer for the development of new percolative dielectric composites with high dielectric permittivity and low loss.

scholarly journals Greatly enhanced dielectric permittivity in La1.7Sr0.3NiO4/poly(vinylidene fluoride) nanocomposites that retained a low loss tangent

RSC Advances ◽  
2017 ◽  
Vol 7 (28) ◽  
pp. 17128-17136 ◽  
Author(s):  
Keerati Meeporn ◽  
Prasit Thongbai ◽  
Teerapon Yamwong ◽  
Santi Maensiri
Keyword(s):  
Dielectric Properties ◽  
Dielectric Permittivity ◽  
Loss Tangent ◽  
Polyvinylidene Fluoride ◽  
Vinylidene Fluoride ◽  
Low Loss ◽  
Poly Vinylidene Fluoride

The effect of La1.7Sr0.3NiO4 nanoparticles (LSNO-NPs) on the dielectric properties of LSNO-NPs/polyvinylidene fluoride (LSNO-NPs/PVDF) composites is presented.

scholarly journals Significantly Enhanced Dielectric Properties of Ag-Deposited (In1/2Nb1/2)0.1Ti0.9O2/PVDF Polymer Composites

Polymers ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 1788
Author(s):  
Wattana Tuichai ◽  
Pornsawan Kum-onsa ◽  
Supamas Danwittayakul ◽  
Jedsada Manyam ◽  
Viyada Harnchana ◽  
...  
Keyword(s):  
Polymer Composites ◽  
Ag Nanoparticles ◽  
Vinylidene Fluoride ◽  
Interfacial Polarization ◽  
Theory Model ◽  
Hybrid Particles ◽  
X Ray Diffraction ◽  
Low Loss ◽  
Poly Vinylidene Fluoride ◽  
Pure Pvdf

The enhanced dielectric permittivity (ε′) while retaining a low loss tangent (tanδ) in silver nanoparticle−(In1/2Nb1/2)0.1Ti0.9O2/poly(vinylidene fluoride) (Ag-INTO/PVDF) composites with different volume fractions of a filler (fAg-INTO) was investigated. The hybrid particles were fabricated by coating Ag nanoparticles onto the surface of INTO particles, as confirmed by X-ray diffraction. The ε′ of the Ag−INTO/PVDF composites could be significantly enhanced to ~86 at 1 kHz with a low tanδ of ~0.044. The enhanced ε′ value was approximately >8-fold higher than that of the pure PVDF polymer for the composite with fAg-INTO = 0.5. Furthermore, ε′ was nearly independent of frequency in the range of 102–106 Hz. Therefore, filling Ag−INTO hybrid particles into a PVDF matrix is an effective way to increase ε′ while retaining a low tanδ of polymer composites. The effective medium percolation theory model can be used to fit the experimental ε′ values with various fAg-INTO values. The greatly increased ε′ primarily originated from interfacial polarization at the conducting Ag nanoparticle–PVDF and Ag–INTO interfaces, and it was partially contributed by the high ε′ of INTO particles. A low tanδ was obtained because the formation of the conducting network in the polymer was inhibited by preventing the direct contact of Ag nanoparticles.

Sign in / Sign up

Export Citation Format

Share Document