Dispersion of Carbon Nanotubes Using Mixed Surfactants: Experimental and Molecular Dynamics Simulation Studies

Sohrabi, Beheshteh; Poorgholami-Bejarpasi, Niaz; Nayeri, Niloofar

doi:10.1021/jp407532j

Cited by 82 publications

(40 citation statements)

References 35 publications

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“…The most stable dispersions were F.CNT-C110 and F.CNT-C100 which had an absorbance intensity close to 1, 1.05 and 1.25. As the absorbance value approached 1, it indicated that amount of dispersed CNT was increasing [5]. This UV-Vis spectrum corresponded to the dispersion test results in Fig.2.…”

Section: Uv-vis Spectra Of Cnt-ctabsupporting

confidence: 78%

Modification of carbon nanotube’s dispersion using cetyltrimethyl ammonium bromide (CTAB) as cancer drug delivery

Wulan

Wulandari

Ulwan

et al. 2018

AIP Conference Proceedings

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Abstract. Cancer is a disease that causes many deaths globally. Cancer treatments have side effects that can danger the human body. Carbon nanotube (CNT) becomes drug (anti-cancer) delivery towards cancer cells that have been targeted. Yet, CNT tends to aggregate. It could be overcome by functionalization (modification) of CNT using Cetyltrimethyl Ammonium Bromide (CTAB). The variations we use were CNT-CTAB with a dose of CNT 100 mg and CTAB varied between 80, 90, 100, 110, and 120 mg. There were several stages of CNT modification process: dispersion, filtration, washing, and drying. The optimum condition obtained was on CNT-110 mg CTAB because it could be dispersed up to 70 hours better than pure CNT, Zeta Potential (ZP) ≥16 mV, and absorbance Uv-vis 1.05. Both the ZP value and the absorbance of Uv-vis showed the CNT dispersion modified to be better than the pure CNT. Furthermore, SEM-EDX did not produce structural damage to CNT modified surfaces, the percentage of the mass of Oxygen (O) elements as characteristic of increased hydrophilic properties, and Ni elements as toxic impurities become reduced. FTIR spectrum results showed the highest intensity occurred at CTAB CNT-110mg at 1221 m -1 . This strong C-N vibration interaction suggests that CNTs CNT modification become readily dispersed in water.

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Section: Uv-vis Spectra Of Cnt-ctabsupporting

confidence: 78%

Modification of carbon nanotube’s dispersion using cetyltrimethyl ammonium bromide (CTAB) as cancer drug delivery

Wulan

Wulandari

Ulwan

et al. 2018

AIP Conference Proceedings

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“…The physical adsorption of surfactant on the nanotubes surface reduces the surface tension of CNTs, effectively preventing the formation of aggregates. Also, the presence of an aromatic group in the surfactant molecule allows for π-π stacking interactions with the graphitic sidewalls of the nanotubes, which results in their effective coating and dispersion [47,48] .…”

Section: Non-covalent Functionalizationmentioning

confidence: 99%

Carbon nanotube buckypaper reinforced polymer composites: a review

et al. 2017

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RbstractThis review provides valuable information about the general characteristics, processing conditions and physical properties of carbon nanotube buckypaper (BP) and its polymer composites. Vacuum filtration is the most common technique used for manufacturing BP, since the carbon nanotubes are dispersed in aqueous solution with the aid of surfactant. Previous works have reported that mechanical properties of BP prepared by vacuum filtration technique are relatively weak. On the other hand, the incorporation of polymer materials in those nanostructures revealed a significant improvement in their mechanical behavior, since the impregnation between matrix and BP is optimized. Electrical conductivity of BP/polymer composites can reach values as high as 2000 S/m, which are several orders of magnitude greater than traditional CNT/polymer composites. Also, BP can improve remarkably the thermal stability of polymer matrices, opening new perspectives to use this material in fire retardant applications.

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“…The ability of cationic-rich and anionic-rich mixtures of (cetyltrimethylammonium bromide) CTAB and SDS for dispersing of CNTs in aqueous media has been studied by Sohrabi et al [35] through the MD simulation method. They found that; compared to the pure CTAB and SDS, these mixtures are more effective with the lower concentrations and more individual CNTs, reflecting a synergistic effect in these mixtures.…”

Section: Dispersion Of Cnts By Surfactantmentioning

confidence: 99%

Recent developments concerning the dispersion of carbon nanotubes in surfactant/polymer systems by MD simulation

Fatemi

Foroutan

2015

J Nanostruct Chem

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Carbon nanotubes (CNTs) hold the promise of delivering exceptional mechanical properties and multifunctional characteristics due to their unique physiochemical properties and prospective applications in various nanotechnologies. However, current techniques of CNTs fabrication cannot produce homogenous CNTs, and this prevents the widespread use of CNTs. Ever-increasing interest in applying CNTs in many different fields has led to continued efforts to develop dispersion and functionalization techniques. Techniques for separating bundles of CNTs into homogeneous dispersion are still under development. The preparation of effective dispersions of CNTs presents a major impediment to the extension and utilization of CNTs. CNTs intrinsically tend to bundle and/or aggregate. The prevention of such behavior has been explored by testing various techniques to improve the dispersibility of CNTs in a variety of solvents. There are mainly two approaches to obtain a good quality dispersion; chemical functionalization and physical interactions. The chemical functionalization technique has been found effective, but deteriorates the intrinsic properties of CNTs through the introduction of defects in the wall. Physical blending approaches with the ultrasound and high speed shearing have been proven capable of debundling CNTs and stabilizing individual CNTs while maintaining their integrity and intrinsic properties. Contemporary methods for dispersion of CNTs in aqueous media are discussed and most attention is paid to molecular dynamics simulation techniques and other physical techniques, as well as to the use of various surfactants and polymers.

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Dispersion of Carbon Nanotubes Using Mixed Surfactants: Experimental and Molecular Dynamics Simulation Studies

Cited by 82 publications

References 35 publications

Modification of carbon nanotube’s dispersion using cetyltrimethyl ammonium bromide (CTAB) as cancer drug delivery

Modification of carbon nanotube’s dispersion using cetyltrimethyl ammonium bromide (CTAB) as cancer drug delivery

Carbon nanotube buckypaper reinforced polymer composites: a review

Recent developments concerning the dispersion of carbon nanotubes in surfactant/polymer systems by MD simulation

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