The Electrical Conductivity of Fluoroanhydrite Compositions Modified at the Nanoscale Level with Carbon Black

Yakovlev, Grigory; Pervushin, Grigory; Smirnova, Olga; Begunova, E.V.; Saidova, Zarina

doi:10.2478/rtuect-2020-0044

Cited by 3 publications

(3 citation statements)

References 33 publications

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“…Modification of the mortar was done by adding Fulvek 100 multiwall carbon nanotubes in the amount of 7% by cement mass (manufactured on the basis of Graphistrength TM Masterbatch CW 2-45 ArkemaCo, Kolombe, France). The particular amount of multiwall carbon nanotubes had been defined by previous studies [33,34]. Fresh mortars of the standard consistency were used for the manufacture of sample beams with dimensions of 40 mm × 40 mm × 160 mm.…”

Section: Methodsmentioning

confidence: 99%

The Effect of Complex Modification on the Impedance of Cement Matrices

et al. 2021

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The research results presented in this article were obtained by joint scientific research on creatingcement materials with reduced impedance. It is known that functional additives added to impart electrically conductive properties have a negative impact on physical and mechanical characteristics of the material. This study suggests using the multiwall carbon nanotubes in the amount of 7% from binder mass as a functional additive. The results obtained prove that the addition of this amount of the modifier does not lead to a significant decrease of strength characteristics. Calcium nitrate in the amount of 1–7% was added in order to level the strength loss and to ensure the effective stable electrical conductivity. The multifunctionality of using this salt has been proven, which is manifested in the anti-frost and anticorrosive effects as well in enhancement of electrical conductivity. The optimal composition of the additive with 7% of carbon nanotubes and 3% of calcium nitrate ensures a reduced electrical impedance of cement matrix. The electrical conductivity was 2440 Ohm, while the decrease of strength properties was within 10% in comparison tothe control sample. The nature of changes in the microstructure were studied to determine the influence of complex modifications that showed significant changes in the morphology of the hydration products. The optimum electrical characteristics of cementitious materials are provided due to the uniform distribution of carbon nanotubes and the formation of a network of interconnected micropores filled with the solution of calcium nitrate that provides additional and stable electrical conductivity over time.

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Section: Methodsmentioning

confidence: 99%

The Effect of Complex Modification on the Impedance of Cement Matrices

et al. 2021

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“…Compositions for antistatic flooring are developed, that are based on metal-saturated concrete with the addition of grinding sludge from bearing production [10]. Also known are the fluoroanhydrite compositions for flooring with low electrical resistance, which show that the addition of carbon soot in an amount of 7% by weight of fluoroanhydrite provides a decrease in the electrical resistance of the composition reducing its value to 100 Ohm [11], while the addition of a chrysotile dispersion based on 40% calcium nitrate in an amount 1.5% by weight of fluoroanhydrite reduces the electrical resistance by 106 times [12]. However, the improvement of the electrically conductive properties of the materials is usually accompanied by a decrease in the strength by 50-70% [11,12].…”

Section: Introductionmentioning

confidence: 99%

“…Also known are the fluoroanhydrite compositions for flooring with low electrical resistance, which show that the addition of carbon soot in an amount of 7% by weight of fluoroanhydrite provides a decrease in the electrical resistance of the composition reducing its value to 100 Ohm [11], while the addition of a chrysotile dispersion based on 40% calcium nitrate in an amount 1.5% by weight of fluoroanhydrite reduces the electrical resistance by 106 times [12]. However, the improvement of the electrically conductive properties of the materials is usually accompanied by a decrease in the strength by 50-70% [11,12]. Considering all the above, the aim of this research was to determine the electrical conductive properties of the previously developed plasticized fluoroanhydrate composition used for flooring and to select an effective technological solution for its modification, which would reduce the electrical conductivity of the material while maintaining high physical and mechanical characteristics.…”

Section: Introductionmentioning

confidence: 99%

Effect of Carbon-Containing Additives on the Properties of Fluoroanhydrite Compositions Used for Flooring

Kalabina

Yakovlev

Saidova

et al. 2022

KEM

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The effect of carbon-containing additives on the physical, mechanical and electrical properties of the fluoroanhydrite composition used for self-leveling floors has been investigated. Copper/carbon nanocomposite, crushed technogenic graphite and thermally expanded graphite were used as modifying additives in this research. A method for obtaining thermally expanded graphite was described; the efficiency of its introduction into the plasticized fluoroanhydrite composition was proven: the electrical resistance of the material decreased by 11 times with an insignificant drop in strength on the 7th day from 34.9 to 29.8 MPa (15%). Modification of the composition with copper/carbon nanocomposite did not prove to be effective, leading to a 3-fold decrease in the electrical resistance of the material accompanied by a 4-fold decrease in the compressive strength of the samples. Modification of the composition with micro-sized particles of technogenic graphite lead to a decrease in the strength of the material by 28% without affecting its electrically conductive properties.

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Preparation and applications of hydrophilic quaternary ammonium salt type polymeric antistatic agents

Zhang

Cui

Lin³

et al. 2022

E-Polymers

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A novel ammonium salt type polymeric antistatic agent (PDSH) was synthesized from methacrylatoethyl trimethyl ammonium chloride, styrene, and 2-hydroxyethyl methacrylate via radical polymerization. Antistatic poly(acrylonitrile-co-butadiene-co-styrene) (ABS)/PDSH composites were prepared by blending PDSH with ABS resin. The results showed that the surface resistivity of ABS/PDSH composites with PDSH addition decreased significantly. The surface resistivity of ABS/PDSH composites containing 20 wt% PDSH was around 109–1010 Ω, which was about 106 times lower than that of neat ABS. At the same time, ABS/PDSH composites had good thermal stability and hydrophilicity. The PDSH was more uniformly dispersed within the ABS resin and had less influence on the mechanical properties of the composites. With the demonstrated properties, the prepared copolymer PDSH can serve as a well-integrated antistatic agent and display potential for the antistatic treatment of ABS.

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The Electrical Conductivity of Fluoroanhydrite Compositions Modified at the Nanoscale Level with Carbon Black

Cited by 3 publications

References 33 publications

The Effect of Complex Modification on the Impedance of Cement Matrices

The Effect of Complex Modification on the Impedance of Cement Matrices

Effect of Carbon-Containing Additives on the Properties of Fluoroanhydrite Compositions Used for Flooring

Preparation and applications of hydrophilic quaternary ammonium salt type polymeric antistatic agents

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