Effect of Surfactant Stabilizers on the Distribution of Carbon Nanotubes in Aqueous Media

Tolchkov, Yury N.; Mikhaleva, Z. A.; SLDOZIAN, RAMI; Memetov, N. R.; Ткачев, А. Г.

doi:10.1007/s11595-018-1855-3

Cited by 6 publications

(2 citation statements)

References 5 publications

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“…The most typical way to generate an aqueous suspension using pre-synthesized nanostructures is to process them further in the rst form before the procedure of entry into the composite structure (for example, by processing a dry combination of components). Signi cant challenges in introducing a nano-modi ed and its uniform distribution are reduced to the utmost extent when utilizing the second method [23][24][25][26]. The article's consideration [27,28] on the nanomodi cation of construction composites document favorable structural changes, for instance, the ability of carbon nano-additives to allow much higher values of physicomechanical characteristics In comparison to the unmodi ed samples, the nanomodi ed samples developed large value of calcium hydrosilicates and a low porosity structure, which allowed for these modi cations to occur.…”

Section: Introductionmentioning

confidence: 99%

Comparing preparation of carbon nanotubes between sol-gel and thermal decomposition and their effect on the properties of lightweight concrete

Sldozian

2023

Preprint

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Scientific modernity lies in the development of a method for obtaining a complex nanomodifier of foam concrete based on CNTs synthesized by the CVD method on sand filler particles pre-treated with a metal oxide catalyst, which allows solving the problem of agglomeration and uniform distribution of carbon nanostructures in the cement-sand matrix. The morphological and physicochemical properties of the obtained nanomodifier based on CNTs were studied by the methods of SEM (with a determination of the elemental composition), TEM, Raman spectroscopy, and X-ray diffraction analysis. Regularities of the effect of the technology of obtaining and concentration of the catalyst, as well as the time of synthesis of CNTs on the prepared sand carrier, on the change in the physico-mechanical characteristics of foam concrete samples were established. It is shown that the use of the technology of thermal decomposition of the precatalyst for the composition (CoMo-MgOAl2O3) makes it possible to synthesize a nanomodified sand filler that provides the greatest increase in the strength of foam concrete: ΔСS ~ 34%; ΔBS ~ 32%. The rational time for the synthesis of CNTs is 30 min, while, according to TGA, the increase in the mass of CNTs is ~ 6% wt. (for catalyst without dilution). Dilution of the catalyst with distilled water by 2 and 4 times leads to a subsequent deterioration in the physical and mechanical characteristics of foam concrete. Regularities of the effect of the mass percentage of the introduction and the size of the nanomodified filler fraction on the physical and mechanical characteristics of foam concrete samples were established. It is shown that the most effective is the introduction of 1% wt. nanostructured sand additive with a fraction of 0.16 mm. An increase in compressive strength, and bending strength of foam concrete samples during their modification with developed nanostructured additives, depending on the type and concentration of the CNT growth catalyst, the percentage of introduction and fraction of nanomodified sand, and the composition of the additive. For the first time, the positive effect of adding a complex additive containing nanomodified sand filler (1% wt.) and metakaolin (10% wt.) to the foam concrete mixture has been proven.

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Section: Introductionmentioning

confidence: 99%

Comparing preparation of carbon nanotubes between sol-gel and thermal decomposition and their effect on the properties of lightweight concrete

Sldozian

2023

Preprint

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“…Even if the adsorption mechanisms of the surfactants on the CNT surface are under investigations [17], the ability of surfactants to stabilize CNT in suspension has been studied multiple times. Different surfactants have been used such as sodium dodecyl sulphate (SDS) [17][18][19][20][21], cetrimonium bromide (CTAB) [22] and Triton X-100 [23][24][25]. Some studies show significant differences in CNT' stabilization depending on the surfactant's nature and concentration [12,[25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Optimization of highly concentrated dispersions of multi-walled carbon nanotubes with emphasis on surfactant content and carbon nanotubes quality

Pontoreau

Emmanuel²,

Bourda³

et al. 2020

Nanotechnology

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Optimized multi-wall carbon nanotubes (MWNT) suspensions in aqueous solution have been obtained by joint use of ultrasonification and surfactant. A simple experimental procedure has been established to efficiently evaluate the dependence of the surfactant concentration on the MWNT concentration stable in suspension. The study of 3 different surfactants and MWNT provided by 3 suppliers showed that a threshold surfactant concentration exists above which the MWNT concentration is maximum. Furthermore, it is demonstrated that the maximum MWNT concentration achievable varies from 0.50 to 7.5 g/L depending mainly on quality of the MWNT determined by Raman spectroscopy analysis.

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Location and Path Planning of Cross-Border E-Commerce Logistics Distribution Center in Cloud Computing Environment

Jiang

2021

Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering

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Effect of Surfactant Stabilizers on the Distribution of Carbon Nanotubes in Aqueous Media

Cited by 6 publications

References 5 publications

Comparing preparation of carbon nanotubes between sol-gel and thermal decomposition and their effect on the properties of lightweight concrete

Comparing preparation of carbon nanotubes between sol-gel and thermal decomposition and their effect on the properties of lightweight concrete

Optimization of highly concentrated dispersions of multi-walled carbon nanotubes with emphasis on surfactant content and carbon nanotubes quality

Location and Path Planning of Cross-Border E-Commerce Logistics Distribution Center in Cloud Computing Environment

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