Nitrile N-oxides in programmable one-pot functionalization of multi-wall carbon nanotubes via 1,3-dipolar cycloaddition

RSC Advances ◽  
2016 ◽  
Vol 6 (68) ◽  
pp. 64129-64132 ◽  
Author(s):  
A. P. Herman ◽  
S. Boncel
Keyword(s):  
Carbon Nanotubes ◽  
Functional Groups ◽  
Dipolar Cycloaddition ◽  
One Pot ◽  
Multi Wall Carbon Nanotubes

Multi-wall carbon nanotubes (MWCNTs) were one-pot functionalized with a series of nitrile N-oxides as 1,3-dipoles carrying diverse functional groups.

CARBON NANOTUBE-GRAFT-BLOCK COPOLYMERS CONTAINING SILVER NANOPARTICLES

2009 ◽  
Vol 08 (06) ◽  
pp. 533-541 ◽  
Author(s):  
MOHSEN ADELI ◽  
REZA SEPAHVAND ◽  
ALI BAHARI ◽  
BANDAR ASTINCHAP
Keyword(s):  
Carbon Nanotubes ◽  
Silver Nanoparticles ◽  
Carbon Nanotube ◽  
Block Copolymers ◽  
Functional Groups ◽  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Multi Wall Carbon Nanotubes ◽  
Grafted Copolymer ◽  
Monomer Ratio

Polycaprolactone-polylactide block copolymers (PCL-block-PLA) were grafted onto filled multi-wall carbon nanotubes (MWCNT) successfully. In this synthesis, MWCNTs were opened and functionalized, and then they were filled by silver nanoparticles. The filled MWCNT were used as macroinitiator for ring opening polymerization of ε-caprolactone and L-lactide. Then the end hydroxyl functional groups of MWCNT-graft-PCL or MWCNT-graft-PLA were used as initiator for ring opening polymerization of lactide and ε-caprolactone and MWCNT-graft-PCL-block-PLA or MWCNT-graft-PLA-block-PCL were obtained, respectively. Length of grafted copolymer chains onto the MWCNT was controlled using CNT/monomer ratio. Nanocomposites' properties depend on the length of polymer blocks strongly. Structure of nanocomposites was evaluated by TEM and spectroscopy methods.

scholarly journals Enhancement of performance for graphite felt modified with carbon nanotubes activated by KOH as Cathode in electro-fenton systems

2021 ◽  
Vol 19 ◽  
pp. 228080002110053
Author(s):  
Yita Wang ◽  
Boyou Lin
Keyword(s):  
Carbon Nanotubes ◽  
Functional Groups ◽  
Advanced Oxidation Processes ◽  
Dye Decolorization ◽  
Graphite Felt ◽  
Multi Wall Carbon Nanotubes ◽  
Decolorization Rate ◽  
Composite Cathodes ◽  
Flake Structure ◽  
Tubular Form

The electro-Fenton (EF) process is one of the advanced oxidation processes (AOPs). Graphite felt is widely used as an cathode material for the EF process, and its performance can be improved by surface modification. Active carbon nanotubes (ACNTs) have more oxygen-containing functional groups and better electrochemical properties compared to Multi-wall carbon nanotubes (MWCNTs). In this study, graphite felt was used as the substrate, and composite cathodes were prepared by surface treatment using MWCNT, graphene, and ACNTs. Rhodamine B (RhB) dye decolorization tests were then conducted to investigate the degradation performance of the EF system with different cathodes. The results showed that based on the micromorphology of ACNT, the tubular form of MWCNT was activated into a GR-like flake structure, it was also found that the strength of the oxygen-containing functional groups of ACNT improved significantly. The activated MWCNT/C cathode exhibited a 60-min decolorization rate of 77.28% compared to the unactivated MWCNT/C cathode, whereas the decolorization rate of the ACNT/C cathode increased to 85.01% after activation, which was close to that of the GR/C cathode at 88.55%. In summary, the ACNT/C cathode exhibited degradation efficiency comparable to that of the GR/C cathode.

Incorporation of Multi Wall Carbon Nanotubes into Glass-Surfaces via Laser-Treatment

2003 ◽  
Vol 772 ◽  
Author(s):  
T. Seeger ◽  
G. de la Fuente ◽  
W.K. Maser ◽  
A.M. Benito ◽  
A. Righi ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Continuous Wave ◽  
Silica Surface ◽  
Multi Wall Carbon Nanotubes ◽  
Composite Formation ◽  
Multi Walled Carbon Nanotubes ◽  
Glass Surfaces ◽  
Walled Carbon Nanotubes ◽  
First Time ◽  
Scanning Electron

AbstractCarbon nanotubes (CNT) are interesting candidates for the reinforcement in robust composites and for conducting fillers in polymers due to their fascinating electronic and mechanical properties. For the first time, we report the incorporation of multi walled carbon nanotubes (MWNTs) into silica-glass surfaces by means of partial surface-melting caused by a continuous wave Nd:YAG laser. MWNTs were detected being well incorporated in the silica-surface. The composites are characterized using scanning electron microscopy (SEM) and Raman-spectroscopy. A model for the composite-formation is proposed based on heatabsorption by MWNTs and a partial melting of the silica-surface.

Study of Fibroblast and Platelet Adhesion on Multi-wall Carbon Nanotubes

2011 ◽  
Vol 26 (1) ◽  
pp. 73-77 ◽  
Author(s):  
Meng-Li ZHAO ◽  
Yu-Chen YUE ◽  
Li YUAN ◽  
De-Jun LI ◽  
Xiao-Ying LÜ ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Platelet Adhesion ◽  
Multi Wall Carbon Nanotubes

Copper-catalyzed Convenient Synthesis and SAR Studies of Substituted-1,2,3-triazole as Antimicrobial Agents

2018 ◽  
Vol 16 (1) ◽  
pp. 3-10
Author(s):  
Aniket P. Sarkate ◽  
Kshipra S. Karnik ◽  
Pravin S. Wakte ◽  
Ajinkya P. Sarkate ◽  
Ashwini V. Izankar ◽  
...  
Keyword(s):  
Antimicrobial Activity ◽  
Antifungal Activity ◽  
Antimicrobial Agents ◽  
Cycloaddition Reaction ◽  
Dipolar Cycloaddition ◽  
One Pot ◽  
Triazole Derivatives ◽  
Sar Studies ◽  
Convenient Synthesis ◽  
Antibacterial And Antifungal

Background:A novel copper-catalyzed synthesis of substituted-1,2,3-triazole derivatives has been developed and performed by Huisgen 1,3-dipolar cycloaddition reaction of azides with alkynes. The reaction is one-pot multicomponent.Objective:We state the advancement and execution of a methodology allowing for the synthesis of some new substituted 1,2,3-triazole analogues with antimicrobial activity.Methods:A series of triazole derivatives was synthesized by Huisgen 1,3-dipolar cycloaddition reaction of azides with alkynes. The structures of the synthesized compounds were elucidated and confirmed by 1H NMR, IR, MS and elemental analysis. All the synthesized compounds were tested for their antimicrobial activity against a series of strains of Bacillus subtilis, Staphylococcus aureus and Escherichia coli for antibacterial activity and against the strains of Candida albicans, Aspergillus flavus and Aspergillus nigar for antifungal activity, respectively.Results and Conclusion:From the antimicrobial data, it was observed that all the newly synthesized compounds showed good to moderate level of antibacterial and antifungal activity.

Transient Free Convective Flow of CNT Water Nanofluid with Heat Transfer from a Moving Cylinder

2020 ◽  
Vol 10 ◽  
Author(s):  
C. Sridevi ◽  
A. Sailakumari
Keyword(s):  
Carbon Nanotubes ◽  
Heat Generation ◽  
Convective Flow ◽  
Volume Fraction ◽  
Vertical Cylinder ◽  
Single Wall Carbon Nanotubes ◽  
Free Convective Flow ◽  
Multi Wall Carbon Nanotubes ◽  
Moving Cylinder ◽  
Variable Surface

Background: In this paper, transient two-dimensional laminar boundary layer viscous incompressible free convective flow of water based nanofluid with carbon nanotubes (CNTs) past a moving vertical cylinder with variable surface temperature is studied numerically in the presence of thermal radiation and heat generation. Methods: The prevailing partial differential equations which model the flow with initial and boundary conditions are solved by implicit finite difference method of Crank Nicolson type which is unconditionally stable and convergent. Results: Influence of Grashof number (Gr), nanoparticle volume fraction ( ), heat generation parameter (Q), temperature exponent (m), radiation parameter (N) and time (t) on velocity and temperature profiles are sketched graphically and elaborated comprehensively. Conclusion: Analysis of Nusselt number and Skin friction coefficient are also discussed numerically for both single wall carbon nanotubes (SWCNTs) and multi wall carbon nanotubes (MWCNTs).

One-Pot Tandem 1,3-Dipolar Cycloaddition of Azinium Ylides Using Water as Solvent

2014 ◽  
Vol 1 (3) ◽  
pp. 227-231 ◽  
Author(s):  
Deepika Singh ◽  
Pragya Sinha ◽  
Raj Bansal
Keyword(s):  
Dipolar Cycloaddition ◽  
One Pot ◽  
Water As Solvent

Functionalization of Individual Multi-Wall Carbon Nanotubes during Irradiation and Annealing

2020 ◽  
Vol 62 (11) ◽  
pp. 2173-2183
Author(s):  
V. V. Bolotov ◽  
E. V. Knyazev ◽  
P. M. Korusenko ◽  
S. N. Nesov ◽  
V. A. Sachkov
Keyword(s):  
Carbon Nanotubes ◽  
Multi Wall Carbon Nanotubes
Sign in / Sign up

Export Citation Format

Share Document