A reinforced, high-κ ternary polymer nanocomposite dielectrics of PVDF, barium titanate nanoparticles, and TEMPO-oxidized cellulose nanofibers

Sato, Masaki; Ishii, Haruyuki; Sueda, Yoshiki; Watanabe, Kanako; Nagao, Daisuke

doi:10.1016/j.jcomc.2021.100163

Cited by 9 publications

(6 citation statements)

References 39 publications

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“…NPs modified with a nonpolar ligand exhibit superior dispersibility in nonpolar solvents (e.g., toluene and n -hexane). − Owing to chemisorbed organic modifiers on NPs, the dispersibility of NPs could be drastically altered. , By using such surface-modified NPs, polymer nanocomposites with better NP dispersibility have been developed. Particularly in the field of electronics, a higher dispersibility of nanofillers (e.g., barium titanate (BaTiO 3 )) is required to improve the electrochemical performance and transparency of nanocomposites. − On the other hand, some organically modified NPs are less dispersible in polar organic solvents such as DMSO, acetone, etc. , Possible approaches to tune the dispersibility of NPs in solvents, via surface modification, are (1) a combined use of modifiers and (2) a quantitative control of the ratio of modifier to surface silanol group . In most cases, however, an excess amount of modifier was used in the surface modification reaction, which made it difficult to have a quantitative discussion of how the degree of surface modification contributes to altering the surface properties of NPs.…”

Section: Introductionmentioning

confidence: 99%

A Quantitative Approach to Characterize the Surface Modification on Nanoparticles Based on Localized Dielectric Environments

Mochizuki,

Sampei,

Suga

et al. 2024

Anal. Chem.

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Nanoparticles (NPs) are utilized for the functionalization of composite materials and nanofluids. Although oxide NPs (e.g., silica (SiO 2 )) exhibit less dispersibility in organic solvents or polymers due to their hydrophilic surface, the surface modification using silane coupling agents can improve their dispersibility in media with low dielectric constants. Herein, SiO 2 NPs were functionalized using octyltriethoxysilane (OTES, C8) and dodecyltriethoxysilane (DTES, C12), wherein the degrees of surface modification of SiO 2 @C8 and SiO 2 @C12 were quantitatively evaluated based on the ratio of modifier to surface silanol group (θ) and the volume fraction of organic modifier to total particle volume (ϕ R ). The variations of surface properties were revealed by analyzing the Hansen solubility parameters (HSP). Particularly, the surface modification using OTES or DTES significantly affected the polarity (δ P ) of NPs. The local dielectric environments of surface-modified SiO 2 NPs were characterized using a solvatochromic dye, Laurdan. By analyzing the peak position of the steady-state emission spectrum of Laurdan in a NP suspension, the apparent dielectric environments surrounding NPs (ε app ) were obtained. A good correlation between ϕ R and ε app was observed, indicating that ϕ R is a reliable quantity for understanding the properties of surface-modified NPs. Furthermore, the generalized polarization (GP) of NPs was investigated. The surface-modified SiO 2 NPs with higher ϕ R (≥0.15) exhibited GP > 0, suggesting that the modifiers are well-organized on the surface of NPs. The localized dielectric environment surrounding NPs could be predicted by analyzing the volume fraction of nonpolar moieties derived from modifiers. Alternatively, ε app and GP can be utilized for understanding the properties of inorganic−organic hybrid NPs.

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Section: Introductionmentioning

confidence: 99%

A Quantitative Approach to Characterize the Surface Modification on Nanoparticles Based on Localized Dielectric Environments

Mochizuki,

Sampei,

Suga

et al. 2024

Anal. Chem.

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“…[ 1 ] In fact, dielectric ceramics typically show enhanced dielectric properties, [ 2 ] but polymers are characterized by flexibility, easy processing, and low cost compared to dielectric ceramics. [ 3 ] Therefore, the combination of high‐dielectric polymers and ceramics is a suitable approach to take advantage of the main characteristics of each constituent, [2a,4] leading to a new generation of materials for sensors, [1b,1c] capacitors, and electronic components [1a,5] or medical devices, [ 3,5 ] among others.…”

Section: Introductionmentioning

confidence: 99%

“…

enhanced dielectric properties, [2] but polymers are characterized by flexibility, easy processing, and low cost compared to dielectric ceramics. [3] Therefore, the combination of high-dielectric polymers and ceramics is a suitable approach to take advantage of the main characteristics of each constituent, [2a,4] leading to a new generation of materials for sensors, [1b,1c] capacitors, and electronic components [1a,5] or medical devices, [3,5] among others.The energy density, U ¼ 1=2ε 0 Â ε 0 Â E 2 , of flexible polymer-based materials can be optimized by using high-dielectric breakdown strength, E, polymers (about some MV/m), combined with high-dielectric constant ceramics. [4,6] Thus, the key issue in preparing high-performance polymer composites is the selection of the host polymer and the dielectric ceramic, together with the processing that allows processing scalability.

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confidence: 99%

Tailoring the Electrical Response of Polyvinylidene Fluoride Nanocomposites with Electrically Conductive and Dielectric Fillers

Rodrigues-Marinho,

Tubio,

Lanceros-Mendez

et al. 2023

Adv Eng Mater

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Polymer‐based composites combining the flexibility, low‐density and processability of the matrix with the tailored functional performance provided by the fillers are also particularly suitable for large area, flexible, and printable applications. In this work, polyvinylidene fluoride (PVDF) composites with conductive graphene nanoplatelets (G‐NPL) and high‐dielectric constant ceramics, including barium and strontium titanate (BT and SrT) have been developed to achieve electrically conductive and high‐dielectric response materials, respectively. Flexible composites reinforced with 45 wt.% ceramic content lead to a dielectric constant of ε´= 33 and 25 for BT and SrT, respectively, 6 and 4 times higher than for pristine PVDF. Further, the inclusion of G‐NPL allows for the development of highly conductive composites with a maximum conductivity of 5.5×10‐2 (Ω.m)‐1 for a 5 wt.% filler content, 10 orders of magnitude larger than PVDF. The G‐NPL and ceramic in optimized contents in PVDF tricomposites do not enhance the dielectric properties compared to PVDF‐ceramic composites. Theoretical analysis has been used to determine the critical percolation threshold of the PVDF/G‐NPL, which occurs at ϕc= 0.6 wt.% G‐NPL content with a critical exponent of t= 2.49, and to describe the dielectric properties of the composites, allowing to further tailor materials responses for specific application needs.This article is protected by copyright. All rights reserved.

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“…Since the reduction of the volume of lithium batteries with liquid electrolytes. Solid-state batteries are an alternative with the availability of easy kinetics of diffusion of Li within the polymer [22][23][24][25][26]. To increase the electrical conductivity of the batteries.…”

Section: Introductionmentioning

confidence: 99%

Strength enhancement of LiZnVO 4 nanoparticles incorporated with PVDF nanocomposites for high-performance lithium-ion battery application

Elashmawi

Ismail

Abdelghany

et al. 2022

Preprint

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This work aims to prepare LiZnVO4 nanoparticles and incorporate them into PVDF as a host polymeric material using the casting method for rechargeable Li-battery applications. The effect of LiZnVO4 on the structural and optical properties of the samples was studied using XRD, FT-IR, and UV-is techniques. Moreover, the electrical conductivity of the prepared films was studied. The XRD spectra show semicrystalline structure of PVDF and the rhombohedral structure of LiZnVO4. Scherer's equation was used to determine the crystallite size of LiZnVO4 which is nearly 83 nm. The interaction between PVDF and LiZnVO4 was approved by shifting some FT-IR bands. The band gap energies were decreased by increasing LiZnVO4 due to the density in the localized states in the mobility band gap in PVDF. The AC parameters as a function of frequency and temperature were investigated in detail. Both ε' and ε" had their maximum values at low frequencies and decreased as the frequency and temperature increased. The dielectric properties and tan δ were improved, particularly 5 wt% of LiZnVO4, which confirms the XRD and FT-IR results indicating their suitability as a suitable base material for designing and developing promising energy storage devices and lithium batteries.

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A reinforced, high-κ ternary polymer nanocomposite dielectrics of PVDF, barium titanate nanoparticles, and TEMPO-oxidized cellulose nanofibers

Cited by 9 publications

References 39 publications

A Quantitative Approach to Characterize the Surface Modification on Nanoparticles Based on Localized Dielectric Environments

A Quantitative Approach to Characterize the Surface Modification on Nanoparticles Based on Localized Dielectric Environments

Tailoring the Electrical Response of Polyvinylidene Fluoride Nanocomposites with Electrically Conductive and Dielectric Fillers

Strength enhancement of LiZnVO 4 nanoparticles incorporated with PVDF nanocomposites for high-performance lithium-ion battery application

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