Comparative study of the modification of multi-wall carbon nanotubes by gamma irradiation and sonochemically assisted acid etching

Bibi, Saira; Yasin, Tariq; Nawaz, Mohsan; Price, Gareth J.

doi:10.1016/j.matchemphys.2017.12.047

Cited by 21 publications

(9 citation statements)

References 38 publications

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“…Similar results were reported Cabello-Alvarado et al when modifying Multi-Wall Carbon Nanotube (MWCNT) with citric acid, who showed that ultrasound energy causes damage in the structure of MWCNT and a decrease in oxidation [ 32 ]. In 2017, Bibi et al reported that the scope of the surface reaction can be controlled with the modification of sonication time, and this technique can be used to vary the mean length of carbon structures [ 33 ].…”

Section: Resultsmentioning

confidence: 99%

Synthesis of Nylon 6/Modified Carbon Black Nanocomposites for Application in Uric Acid Adsorption

Andrade-Guel¹,

Ávila‐Orta²,

Cadenas‐Pliego³

et al. 2020

Materials

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High uric acid levels cause different clinic conditions. One of them is hyperuricemia, which leads to kidney damage. A solution for eliminating uric acid in the blood is by hemodialysis, which is performed using nanocomposite membranes. In this work, Nylon 6 nanocomposites were synthesized with modified carbon black (MCB), which were considered candidate materials for hemodialysis membranes. The modification of carbon black was made with citric acid using the variable-frequency ultrasound method. The new MCB was characterized by Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), X-ray diffraction (XRD), transmission electron microscopy (TEM), and dispersion tests. Nylon 6/MCB nanocomposites were processed using the ultrasound-assisted melt-extrusion method to improve the dispersion procedure of the nanoparticles. The Nylon 6/MCB nanocomposites were characterized by FTIR, TGA, and differential scanning calorimetry (DSC). These were assessed for the absorption of toxins and hemocompatibility. MBC and nanocomposites showed excellent uric acid removal (78–82%) and hemocompatibility (1.6–1.8%). These results suggest that Nylon 6/MCB nanocomposites with low loading percentages can be used on a large scale without compatibility problems with blood.

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Section: Resultsmentioning

confidence: 99%

Synthesis of Nylon 6/Modified Carbon Black Nanocomposites for Application in Uric Acid Adsorption

Andrade-Guel¹,

Ávila‐Orta²,

Cadenas‐Pliego³

et al. 2020

Materials

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“…Raman spectroscopy is one of the most important techniques for the analysis of the vibrational modes and the structure of carbon nanotubes [ 32 , 33 ]. Figure 7 b shows Raman analysis results of the functionalized MWCNTs, where the peak positions at 1311 cm −1 , 1601 cm −1 and 2608 cm −1 were attributed to the disorder-induced D band (in-plane vibrations of sp 3 carbon), the G band (the crystalline graphitic and in-plane vibrations of sp 2 carbon), and the G’ band (the second overtone of the D-band) [ 34 ].…”

Section: Resultsmentioning

confidence: 99%

“…Figure 7 b shows Raman analysis results of the functionalized MWCNTs, where the peak positions at 1311 cm −1 , 1601 cm −1 and 2608 cm −1 were attributed to the disorder-induced D band (in-plane vibrations of sp 3 carbon), the G band (the crystalline graphitic and in-plane vibrations of sp 2 carbon), and the G’ band (the second overtone of the D-band) [ 34 ]. The relative intensity ratio, I D / I G , was sensitive to physical and chemical processing of the CNTs, and it was an indication of the degree of amorphous carbon atoms to graphitic carbon atoms on the surface of the CNTs, which reflected the structural integrity of the graphite [ 33 ]. The I D / I G of MWCNT-BuGE (2.4) and MWCNT-BeGE (2.5) was a little higher than that of the MWCNT-NH 2 (2.3), suggesting that the surface sizing treatment had little negative effect on the structural integrity of the graphite, consistent with the observation of HRTEM analysis ( Figure 3 a–c).…”

Section: Resultsmentioning

confidence: 99%

Surface Sizing Treated MWCNTs and Its Effect on the Wettability, Interfacial Interaction and Flexural Properties of MWCNT/Epoxy Nanocomposites

et al. 2018

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A surface-sizing technique was offered to take full advantage of multi-walled carbon nanotubes (MWCNTs) and epoxy resins. Two surface-sizing treated MWCNTs were obtained through a ball-milling treatment of amino-functionalized MWCNTs (MWCNT-NH2) with n-butyl glycidylether (BuGE) and benzyl glycidylether (BeGE). These were referred to as MWCNT-BuGE and MWCNT-BeGE. The results indicated that the surface sizing effectively enhanced wettability, dispersibility of MWCNTs in the epoxy resin. These ameliorating effects, along with improved interfacial interaction between MWCNT-BeGE containing benzene rings and the epoxy matrix, which can offer a more efficient local load-transfer from matrix to MWCNTs, as observed by a higher G-band shift in Raman spectrum under bending loads than that of MWCNT-BuGE reinforced ones. Correspondingly, MWCNT-BeGE/epoxy nanocomposites exhibited increasing flexural strength and modulus of 22.9% and 37.8% respectively compared with the neat epoxy, and 7.3% and 7.7% respectively compared with MWCNT-BuGE/epoxy nanocomposites with the same MWCNT content.

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“…One can cite at least three major effects associated with the use of US. First, they can induce local defects on their structure [92][93][94][95][96][97]. Green et al reported that defects ranging from bending and buckling up to breakage of small pieces of graphitic layers were reported early on via TEM studies.…”

Section: Surfactant-assisted Suspensions Of Cntsmentioning

confidence: 99%

Methods for dispersing carbon nanotubes for nanotechnology applications: liquid nanocrystals, suspensions, polyelectrolytes, colloids and organization control

Manzetti

Gabriel

2019

Int Nano Lett

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Carbon nanotubes (CNTs) are a central part of advanced nanomaterials and are used in state-of-the-art technologies, based on their high tensile strength, excellent thermal transfer properties, low-band gaps and optimal chemical and physical stability. Carbon nanotubes are also intriguing given their unique π-electron-rich structures, which opens a variety of possibilities for modifications and alterations of their chemical and electronic properties. In this review, a comprehensive survey of the methods of solubilization of carbon nanotubes is presented, forming the methodological foundation for synthesis and manufacturing of modified nanomaterials. The methods presented herein show that solubilized carbon nanotubes have a great potential in being applied as reactants and components for advanced solar cell technologies, nanochemical compounds in electronics and as parts in thermal transfer management. An example lies in the preservation of the aromatic chemistry in CNTs and ligation of functional groups to their surfaces, which confers CNTs with an optimal potential as tunable Schottky contacts, or as parts in nanotransistors and nano-resistances. Future nanoelectronic circuits and structures can therefore depend more and more on how carbon nanotubes are modified and functionalized, and for this, solubilization is often a critical part of their fabrication process. This review is important, is in conjecture with the latest developments in synthesis and modification of CNTs, and provides the know-how for developing new CNT-based state-of-the-art technologies, particularly with emphasis on computing, catalysis, environmental remediation as well as microelectronics.

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Comparative study of the modification of multi-wall carbon nanotubes by gamma irradiation and sonochemically assisted acid etching

Cited by 21 publications

References 38 publications

Synthesis of Nylon 6/Modified Carbon Black Nanocomposites for Application in Uric Acid Adsorption

Synthesis of Nylon 6/Modified Carbon Black Nanocomposites for Application in Uric Acid Adsorption

Surface Sizing Treated MWCNTs and Its Effect on the Wettability, Interfacial Interaction and Flexural Properties of MWCNT/Epoxy Nanocomposites

Methods for dispersing carbon nanotubes for nanotechnology applications: liquid nanocrystals, suspensions, polyelectrolytes, colloids and organization control

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