Interfacial interactions and interfacial polarization in polyazomethine/MWCNTs nanocomposites

Bronnikov, Sergei; Kostromin, Sergei; Asăndulesa, Mihai; Pankin, Dmitrii; Podshivalov, Aleksandr

doi:10.1016/j.compscitech.2020.108049

Cited by 35 publications

(23 citation statements)

References 31 publications

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“…In other words, when BT/TA-Fe III /Ag nanoparticles are dispersed in the matrix and are not connected, Ag nanoparticles can form a large number of nanocapacitors, resulting in the enhancement of the dielectric constant. 42 Due to the fact that Ag nanoparticles could not only increase the interfacial polarization of composites but also act as nanocapacitors at the interface between the matrix and nanoparticles, they played a major role in improving the dielectric constant. However, the dielectric constant of the 50 phr BT/TA-Fe III /Ag/NR composite did not increase sharply as expected.…”

Section: Resultsmentioning

confidence: 99%

“…Second, conductive Ag nanoparticles could be considered as nanocapacitors at the interface between the matrix and nanoparticles. In other words, when BT/TA-Fe III /Ag nanoparticles are dispersed in the matrix and are not connected, Ag nanoparticles can form a large number of nanocapacitors, resulting in the enhancement of the dielectric constant . Due to the fact that Ag nanoparticles could not only increase the interfacial polarization of composites but also act as nanocapacitors at the interface between the matrix and nanoparticles, they played a major role in improving the dielectric constant.…”

Section: Resultsmentioning

confidence: 99%

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Enhanced Electromechanical Performance of Natural Rubber Composites via Constructing Strawberry-like Dielectric Nanoparticles

Yang

Liang

et al. 2020

ACS Appl. Polym. Mater.

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Dielectric elastomer actuators (DEA) were widely applied in the field of sensors, artificial muscles, and microrobotics as they can convert electrical energy into mechanical energy. In this work, we have designed strawberry-like barium titanate/tannic acid-ferric ion/silver (denoted as BT/TA-FeIII/Ag) dielectric nanoparticles to improve the electromechanical performance of natural rubber (NR)-based composites. In the first instance, BT nanoparticles were modified by TA by introducing catechol- and pyrogallol-type phenols, which can be complexed with FeIII to form a coating of TA-FeIII on the surface of the BT nanoparticles (denoted as BT/TA-FeIII). Then, Ag nanoparticles were deposited on the surface of BT/TA-FeIII by the reduced Ag+ via an electroless plating method. The addition of BT/TA-FeIII/Ag nanoparticles in the NR matrix enhanced the electromechanical sensitivity of NR-based composites and thus increased the actuation strain of NR-based composites. In addition, the discontinuous silver layer deposited on the surface of BT/TA-FeIII/Ag nanoparticles maintained good insulation of NR-based composites. In the final step, a high actuation strain (15.3%) was achieved by NR-based composites filled with 10 phr BT/TA-FeIII/Ag at a low electrical field (62.2 kV/mm), which was about 2.2 fold larger than the actuation strain of the pure NR (about 7.0% at 54.7 kV/mm). Overall, this strategy could provide insights for the preparation of dielectric elastomers with high actuation strain driven by a low voltage.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Enhanced Electromechanical Performance of Natural Rubber Composites via Constructing Strawberry-like Dielectric Nanoparticles

Yang

Liang

et al. 2020

ACS Appl. Polym. Mater.

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“…[17] Therefore, interfacial tension is used as the most basic parameter for qualitative evaluation of the mechanical behavior of polymer nanocomposites. [18] In addition, in the cases where polymer blends with different mechanical properties are combined with nanofillers and compatibilizers, it is their interfacial interaction that responds to the large deformation of the matrix. [19] In this study, nanocomposites containing two polymers with different mechanical behavior including an engineering plastic, styrene-acrylonitrile (SAN), and an engineering rubber, carboxylated acrylonitrile butadiene rubber (XNBR), two different types of nanofillers including graphene and graphene oxide (GO) separately and together in the presence of XNBR-g-glycidyl methacrylate (GMA) compatibilizer were prepared using the combination of solution and melt mixing.…”

Section: Introductionmentioning

confidence: 99%

Analysis and modeling of modified styrene–acrylonitrile/carboxylated acrylonitrile butadiene rubber nanocomposites filled with graphene and graphene oxide: Interfacial interaction and nonlinear elastoplastic behavior

Azizli

Dehaghi

Nasrollahi

et al. 2021

Polymer Engineering & Sci

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Nonlinear elastoplastic behavior of the nanocomposites based on the styreneacrylonitrile/carboxylated acrylonitrile butadiene rubber (SAN/XNBR) blend was investigated using experimental and theoretical analysis. Graphene, graphene oxide nanoparticles, and glycidyl methacrylate-grafted-XNBR (XNBR-g-GMA) as a compatibilizer were incorporated in the SAN/XNBR blends. In this regard, the focus of this study is on modeling of the stress-strain behavior of these nanocomposites, considering the effect of the interfacial interactions made by compatibilizer. For this purpose, field emission scanning electron microscopy (FESEM) and transmission electron microscope (TEM) techniques were used to investigate the relationship between microstructure and mechanical properties of nanocomposites. In addition, FESEM and TEM images showed that the presence of a compatibilizer could influence the dispersion and localization of the nanoparticles. According to the tensile test results, the presence of the compatibilizer increased the mechanical properties of the nanocomposites, specifically elongation at break. Considering the nanocomposite containing compatibilizer and graphene oxide, the elongation at break increased about 570% compared with the nanocomposite without compatibilizer. Better dispersion of graphene oxide and the creation of chemical interaction among components in the presence of the XNBR-g-GMA compatibilizer could be the reasons for these improvements, as confirmed by TEM. The usage of the Bergstrom-Boyce model for analyzing the nonlinear elastoplastic behavior of the nanocomposites illustrated proper conformity with the experimental data in the elastic region. However, there are some deviations in the viscoplastic region, particularly close to the breaking elongation region.

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“…To this aim, it is necessary to load the material of interest with structures able to produce a response to an external magnetic event Magnetic nanoparticles can be classi ed into ve main types: ferromagnetic (iron, nickel, and cobalt), paramagnetic (gadolinium, magnesium, lithium, and tantalum), diamagnetic (copper, silver, gold), antiferromagnetic (MnO, CoO, NiO, and CuCl 2 ), and ferromagnetic (magnetite Fe 3 O 4 and maghemite γ-Fe 2 O 3 ) [4,18,19]. Recently, metallic iron oxide nanoparticles attracted a high interest due to their unique properties (magnetic, magneto-optical, magneto-resistive, thermal, electrical and mechanical properties) allowing them to be used in different applications including magnetic materials (circulators, oscillators and phase shifters for microwave regions), sensors, magnetooptical sensors, anodic materials for batteries, catalysts, sensors, phosphorescent laser sources, microwave and electrochemical devices, as well as black and brown pigments [20,21]. The introduction of magnetic particles into a polymer offers a great potential for inspection since iron oxides have spontaneous magnetic induction.…”

Section: Introductionmentioning

confidence: 99%

Multifunctional poly(vinylidene fluoride) and styrene butadiene rubber blend magneto-responsive nanocomposites based on hybrid graphene oxide and Fe3O4: synthesis, preparation and characterization

et al. 2021

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Functional nanocomposites based on a blend of styrene butadiene rubber (SBR) and polyvinylidene di uoride (PVDF) as the matrix reinforced by a hybrid nano ller system of graphene oxide nanosheets (GOn) and ferromagnetic nanoparticles (Fe 3 O 4 ) at different weight ratios (3.75:1.25; 2.5:2.5 and 1.25:3.75) were successfully prepared and characterized to determine the effect of nano llers hybridization in improving the structural,mechanical, dielectric/electrical, magnetic and thermal properties of a polymer blend (PVDF-SBR) for electromagnetic interference (EMI) shielding applications. Due to the synergy between both nano llers, it was found that the Young's modulus of the nanocomposite containing 5 wt.% of the hybrid nano ller was signi cantly improved (87%), while the strain at yield remained constant due to the low particle content and the rubbery effect of the SBR copolymer. In addition, the degradation temperature of the matrix was shifted from 464°C to 472 °C with the addition of 2.5:2.5 of GOn:Fe 3 O 4 . Finally, the hybrid reinforcement also had a positive effect on the electrical and magnetic properties of the nanocomposites with an improvement that exceeds 30%. By careful selection of synthetic techniques and understanding/exploiting the unique physics of the polymeric nanocomposites in such materials, novel functional polymer-inorganic nanocomposites can be designed and fabricated for new interesting in magneto applications such as superparamagnetism, electromagnetic wave absorption, and electromagnetic interference shielding.

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Interfacial interactions and interfacial polarization in polyazomethine/MWCNTs nanocomposites

Cited by 35 publications

References 31 publications

Enhanced Electromechanical Performance of Natural Rubber Composites via Constructing Strawberry-like Dielectric Nanoparticles

Enhanced Electromechanical Performance of Natural Rubber Composites via Constructing Strawberry-like Dielectric Nanoparticles

Analysis and modeling of modified styrene–acrylonitrile/carboxylated acrylonitrile butadiene rubber nanocomposites filled with graphene and graphene oxide: Interfacial interaction and nonlinear elastoplastic behavior

Multifunctional poly(vinylidene fluoride) and styrene butadiene rubber blend magneto-responsive nanocomposites based on hybrid graphene oxide and Fe3O4: synthesis, preparation and characterization

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