Na1/3Ca1/3Bi1/3Cu3Ti4O12–Ni@NiO/poly(vinylidene fluoride): Three–phase polymer composites with high dielectric permittivity and low loss tangent

Kum−onsa, Pornsawan; Phromviyo, Nutthakritta; Thongbai, Prasit

doi:10.1016/j.rinp.2020.103312

Cited by 12 publications

(5 citation statements)

References 37 publications

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“…An outstanding method to obtain better dielectric properties is to fabricate PVDF polymer composites. Dielectric oxide/PVDF composites are extensively studied, such as BaTiO 3 (BT)/PVDF [6], SrTiO 3 /PVDF [7], Na 1/3 Ca 1/3 Bi 1/3 Ti 4 O 15 /PVDF [8,9], La 1.5 Sr 0.5 NiO 4 /PVDF [10], TiO 2 nanorod/PVDF [11], and CaCu 3 Ti 4 O 12 CCTO)/PVDF [12]. The ε value can be increased in all composite systems.…”

Section: Introductionmentioning

confidence: 99%

“…Dielectric oxide and metal particles were simultaneously used as fillers in the PVDF polymer matrix, i.e., a 3-phase polymer composite [21][22][23][24][25][26][27][28][29]. As well known, the surface modification of a filler can be used to homogeneously disperse filler particles in polymer nanocomposites [8,23,30]. The ε values of ceramic/metal/PVDF composites can be increased.…”

Section: Introductionmentioning

confidence: 99%

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Effects of Sub-Micro Sized BaTiO3 Blocking Particles and Ag-Deposited Nano-Sized BaTiO3 Hybrid Particles on Dielectric Properties of Poly(vinylidene-fluoride) Polymer

Silakaew

Thongbai

2021

Polymers

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This work provided an alternative route to balance the significantly increased dielectric permittivity (ε′) and effectively retained tanδ using an effective two-step concept. Ag-deposited nano-sized BaTiO3 (Ag-nBT) hybrid particle was used as the first filler to increase the ε′ of the poly(vinylidene-fluoride) (PVDF) polymer via the strong interfacial polarization and a high permittivity of nBT and suppress the increased loss tangent (tanδ) owing to the discrete growth of Ag nanoparticles on the surface of nBT, preventing a continuous percolating path. The ε′ and tanδ values at 103 Hz of the Ag-nBT/PVDF composite with fAg-nBT~0.29 were 61.7 and 0.036. The sub-micron-sized BaTiO3 (μBT) particle was selected as the blocking particles to doubly reduce the tanδ with simultaneously enhanced ε′ due to the presence of the tetragonal BT phase. The μBT blocking particles can effectively further inhibit the formation of conducting network and hence further reducing tanδ. By incorporation of μBT clocking particles with fμBT = 0.2, the ε′ value of the Ag-nBT/PVDF-μBT composite (fAg-nBT = 0.30) can significantly increase to 161.4, while the tanδ was reduced to 0.026. Furthermore, the tanδ was lower than 0.09 in the temperature range of −60–150 °C due to the blocking effect of μBT particles.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effects of Sub-Micro Sized BaTiO3 Blocking Particles and Ag-Deposited Nano-Sized BaTiO3 Hybrid Particles on Dielectric Properties of Poly(vinylidene-fluoride) Polymer

Silakaew

Thongbai

2021

Polymers

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“…Thus, the free charges in the PC were reduced. Generally, a low-frequency dielectric response in heterogeneous materials is primarily originated from the interfacial polarization [36,40]. In this case, negative and positive free charges were separated and accumulated at the opposite side of the discontinuous phases, giving rise to the interfacial polarization.…”

Section: Dielectric Propertiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…Generally, the dielectric response in composites is primarily contributed by the accumulation of free changes at the internal interface, producing interfacial polarization [36][37][38]. Thus, variations in the dielectric constant (ε ) of heterogeneous dielectric materials may result from the changes in the free charges in the composites [36,39]. In this case, the interaction between the surfactant and free changes in the composites would result in decreased free charges, hence the variations in the dielectric constant.…”

Section: Introductionmentioning

confidence: 99%

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Dielectric and Mechanical Properties of CTAB-Modified Natural Rubber Latex–Cement Composites

et al. 2022

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Cetyl trimethyl ammonium bromide (CTAB)-modified natural rubber latex/Portland cement paste (CTAB + NL/PC) composites were fabricated by varying the NL/cement and CTAB/cement ratios to improve the elastic property of PC. The stability and workability of the CTAB-modified NL particles in the PC matrix were significantly improved. The microstructure and dielectric property analyses of PC, CTAB/PC, NL/PC, and (CTAB + NL)/PC composites were performed to describe the interaction mechanism between the CTAB-modified NL and PC. The portlandite phase in PC was reduced by incorporating CTAB + NL. Although the tensile strength of NL/PC was significantly increased, its compressive strength also greatly decreased by ~40.3%. The tensile and compressive strengths of CTAB/PC were not significantly improved. Notably, the tensile strength of (CTAB + NL)/PC was significantly increased compared to those of PC, CTAB/PC, and NL/PC, while the depreciated compressive strength was only 18.7%. The optimized compressive–tensile performance of (CTAB + NL)/PC was equal to that of PC. The dielectric constants of NL/PC, CTAB/PC, and (CTAB + NL)/PC were reduced due to the low dielectric constant of NL and the ability of CTAB to capture negative charges in the PC matrix, leading to a reduction in the negative surface charges and hence the interfacial polarization. This result was confirmed by the decreased loss tangent in a low-frequency range, which is usually reduced by decreasing the free charges. This work provides a comprehensive guideline for significantly improving the elastic property of PC while retaining a high compressive strength.

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Effects of boron nitride nanoplates on the dielectric and mechanical properties of carbon nanotubes/silicone rubber composites

Zeng,

Tang

2024

Polymers for Advanced Techs

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Carbon nanotubes (CNTs) have aroused great attentions in silicone rubber (SR) composites due to the excellent electrical and mechanical properties. However, the distribution of CNTs is not ideal because of the agglomeration effect of nanomaterials. Incorporating different dimensional nanofillers may be a solution. In this work, two‐dimensional boron nitride (BN) was added to fabricate CNTs/BN/SR composites. The results showed that BN could benefit the dispersion of CNTs and improve the dielectric and mechanical behaviors of the composites. Large dielectric constant (5.35, 92% more than pure SR) with extremely low loss tangent (0.00108) was obtained in the SR composites incorporated with 2 wt% CNTs and 5 wt% BN. High tensile stress (836 kPa) and elongation at break (332%) were also achieved, with a low elastic modulus of 557 kPa. Besides, the CNTs/BN/SR composites had thermal stability up to 400°C. Thus, enhanced dielectric and mechanical properties were achieved in CNTs/BN/SR composites by incorporating different dimensional nanofillers, which have great potential applications in dielectric elastomer composites.

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Na1/3Ca1/3Bi1/3Cu3Ti4O12–Ni@NiO/poly(vinylidene fluoride): Three–phase polymer composites with high dielectric permittivity and low loss tangent

Cited by 12 publications

References 37 publications

Effects of Sub-Micro Sized BaTiO3 Blocking Particles and Ag-Deposited Nano-Sized BaTiO3 Hybrid Particles on Dielectric Properties of Poly(vinylidene-fluoride) Polymer

Effects of Sub-Micro Sized BaTiO3 Blocking Particles and Ag-Deposited Nano-Sized BaTiO3 Hybrid Particles on Dielectric Properties of Poly(vinylidene-fluoride) Polymer

Dielectric and Mechanical Properties of CTAB-Modified Natural Rubber Latex–Cement Composites

Effects of boron nitride nanoplates on the dielectric and mechanical properties of carbon nanotubes/silicone rubber composites

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