Surfactant-Based Dispersant for Multiwall Carbon Nanotubes to Prepare Ceramic Composites by a Sol–Gel Method

Silva, Patrícia; Almeida, Voltaire O.; Machado, Giovanni Bohm; Benvenutti, Edílson V.; Costa, Tânia Maria Haas; Gallas, Márcia Russman

doi:10.1021/la203056f

Cited by 31 publications

(16 citation statements)

References 33 publications

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“…The authors concluded their findings solely on the basis of their microstructural observations [25]. Recently, Silva et al [39] prepared alumina -CNT and zirconia -CNT nanocomposites by using surfactant based dispersants and reported good interface between the matrices and CNTs.…”

Section: Introductionmentioning

confidence: 93%

Effects of dispersion surfactants on the properties of ceramic–carbon nanotube (CNT) nanocomposites

Inam

Heaton

Brown

et al. 2014

Ceramics International

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Gum Arabic (GA), Sodium Dodecyl Sulfate (SDS) and their mixture were used for the dispersion of multi-walled carbon nanotubes (CNTs) in an alumina matrix. A good dispersion at low loadings (0.5-1 wt%) of CNTs in alumina was achieved by an ultrasonic bath treatment. Dispersions were evaluated by UV-vis spectroscopy and agglomerate size analysis. The mixture of GA and SDS produced good dispersion as compared to GA and SDS alone. Nanocomposite powders were sintered by Spark Plasma Sintering (SPS). Microstructural, electrical and mechanical characterizations of sintered discs were carried out to evaluate the effectiveness of the different dispersants. The mixture of GA and SDS produced homogeneous and agglomerate-free CNT-alumina nanocomposites with higher electrical conductivity and indentation fracture toughness as compared to nanocomposites prepared using GA and SDS alone.

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Section: Introductionmentioning

confidence: 93%

Effects of dispersion surfactants on the properties of ceramic–carbon nanotube (CNT) nanocomposites

Inam

Heaton

Brown

et al. 2014

Ceramics International

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“…Another potential application of gemini surfactants due to their ability to form micelles is the capacity to disperse insoluble in water particles and form stable colloids. Carbon nanotubes (CNT) have unique electrical, optical and mechanical properties, and due to that, they are used as medical sensors, electronics and compatible materials [260]. However, because of strong Van der Waals interactions, the bundles are insoluble in water and common organic solvents Table 3.…”

Section: Dispersionmentioning

confidence: 99%

Multifunctional Gemini Surfactants: Structure, Synthesis, Properties and Applications

Brycki¹,

Kowalczyk²,

Szulc³

et al. 2017

Application and Characterization of Surfactants

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Gemini cationic surfactants are compounds which are composed of two hydrophilic head groups and two hydrophobic tails linked by a spacer at the head groups or closed to them. The spacer can be either hydrophobic or hydrophilic. It can be rigid or flexible. The neutral charge of the molecule is retained by the presence of organic or inorganic counterions. Critical micelle concentrations (CMCs), surface tension (γ) and minimal inhibitory concentration (MIC) are dozen times lower than corresponding parameters of monomeric surfactants. The unique properties of gemini surfactants with a wide range of hydrophiliclipophilic balance (HLB) make them a very useful, innovative material in detergents, cosmetics, personal care products, additives for paints and coatings, biocides, material science, organic synthesis, pharmacy, textiles, enhanced oil recovery, nanotechnology, petroleum and many other branches of life. A large number of papers concerning gemini surfactants have been published so far. This review presents a synthetic look at current work devoted to structure, synthesis and applications of gemini surfactants.

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“…To date, a variety of strategies have been employed to assemble alumina nanoparticles with CNT, including sol-gel processes [9], pressureless sintering process [10], chemical precipitation [11], and heteroaggregation process [12]. CNT-alumina nanocomposites have been synthesized by direct growth of CNT on alumina by chemical vapor deposition, then, the as-grown nanocomposites were densified by spark plasma sintering [13].…”

Section: Introductionmentioning

confidence: 99%

Characterization of the Chemical Bonding between Al2O3 and Nanotube in MWCNT/ Al2O3 Nanocomposite

Saleh¹,

Gupta²

2012

Current Nanoscience

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This work investigates the possible chemical bond formation between functionalized carbon nanotubes and alumina, in multiwall carbon nanotubes/alumina nanocomposite (MWCNT/Al2O3), with the aid of spectroscopic analysis. For this purpose, the nanocomposite MWCNT/alumina was synthesized via hydrothermal treatment. Different characterization techniques, scanning electron microscopy, energy dispersive X-ray spectroscope, X-ray diffraction, Fourier transformed infrared spectroscope and high-resolution transmission electron microscopy, have been used to investigate the interaction of the nanocomposite. XRD data confirmed the main alumina phase on the nanotube was -Al2O3, with 12 nm average crystallite size. The presence of a shift in the carbonyl peak between oxidized nanotube and the nanocomposite, from 1710 cm 1 to 1630 cm 1 indicates the formation of chemical bond between alumina and CNT tips. The study predicts the possibility of covalent chemical bonding between alumina and the nanotube.

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Surfactant-Based Dispersant for Multiwall Carbon Nanotubes to Prepare Ceramic Composites by a Sol–Gel Method

Cited by 31 publications

References 33 publications

Effects of dispersion surfactants on the properties of ceramic–carbon nanotube (CNT) nanocomposites

Effects of dispersion surfactants on the properties of ceramic–carbon nanotube (CNT) nanocomposites

Multifunctional Gemini Surfactants: Structure, Synthesis, Properties and Applications

Characterization of the Chemical Bonding between Al2O3 and Nanotube in MWCNT/ Al2O3 Nanocomposite

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