Some experimental results on polyN-vinylcarbazole–buckminsterfullerene (C60) nanocomposite system

Ballav, Nirmalya

doi:10.1016/j.matlet.2005.05.078

Cited by 16 publications

(11 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The skeletal vibration bands for benzene ring portion of Gd@C 82 -PVK, C 60 -PVK, C 60 /PVK and PVK at the 3000-3100 cm −1 (aromatic C-H asymmetric stretching), 2800-2970 cm −1 (aliphatic C-H stretching), 1530-1600 cm −1 (C=C stretching vibration of vinlydiene group), 1450-1480 cm −1 (ring vibration of NVC moiety), 1330 cm −1 (carbazole ring C-N stretching), 1200-1220 cm −1 (C-H in plane deformation of aromatic ring) and the peaks at 725-745 cm −1 (ring deformation of substituted aromatic ring) could be seen obviously. [41][42] The quantity of C 60 and Gd@C 82 in polymerization process was small compared with the chain of PVK and C 60 and Gd@C 82 had some main peaks, where PVK also had strong FTIR absorption, so the fullerenes peaks in graftedpolymer were covered by the absorption of PVK. These became the reasons for the indistinguishable signals of fullerenes even if C 60 and Gd@C 82 had been chemically attached to the PVK chains.…”

Section: Resultsmentioning

confidence: 99%

Synthesis and Characterization of Gd@C₈₂-PVK and C₆₀-PVK–A Kind of Fullerene-Grafted Polymer

Ruan¹,

Yue²,

Yang³

et al. 2012

j nanosci nanotechnol

View full text Add to dashboard Cite

Different fullerene-grafted poly(N-vinylcarbazole) was synthesized by free radical polymerization and the influence of the amount of initiator, the reaction time and the reaction temperature on the polymerization was studied. Metallofullerene-grafted polymer (Gd@C82-PVK) was firstly synthesized and characterized by GPC, UV-vis, FTIR, DSC, XPS. The results demonstrated that the fullerenes had chemically combined with PVK. Fluorescence spectra suggested that the grafted fullerenes had certain influence on the fluorescence properties of the polymer. This is due to the better electron-attractive ability of fullerenes, which contributed a lot to form the electron donor-acceptor systems in fullerene-grafted poly(N-vinylcarbazole). Potential applications of this kind of materials in optical and memory devices were expected.

show abstract

Section: Resultsmentioning

confidence: 99%

Synthesis and Characterization of Gd@C₈₂-PVK and C₆₀-PVK–A Kind of Fullerene-Grafted Polymer

Ruan¹,

Yue²,

Yang³

et al. 2012

j nanosci nanotechnol

View full text Add to dashboard Cite

show abstract

“…Besides the absorption bands around 871 cm 21 and 1629 cm 21 , which correspond to MWCNTs (24), the other vibrational lines observed between 1400 cm 21 to 1600 cm 21 are associated with the existence of sp 2 C5C structures (25). The presence in the sample of C 60 is revealed by the 430 cm 21 , 514 cm 21 , and 552 cm 21 peaks, which can be noticed in the lower wavenumber region of the spectrum (26). Also, the multitude of other observed absorption lines implies the existence in the sample of amorphous carbon as well.…”

Section: Flame Synthesis Of Multi-walled Nanotubesmentioning

confidence: 89%

Flame Synthesis of Multi‐walled Carbon Nanotubes Using CH₄‐H₂Fuel Blends

Manciu

Camacho

Choudhuri

2008

Fullerenes, Nanotubes and Carbon Nanostructures

View full text Add to dashboard Cite

Flame synthesis of carbon nanotubes (CNTs) has the potential to become a cost effective, energy efficient and scalable method for large-volume commercial synthesis. The in-flame concentration of key particulate inception intermediates, i.e., CH 3 , C 2 H 2 , C 3 H 3 , and C 5 H 5 can be tailored using hydrogen fuel blends to optimize and enhance the yield of flame synthesis processes. Additionally, synthesis of CNTs using hydrogen fuel blends (coal or biomass derived gases) creates new opportunities for efficient coal utilization and biproduct synergism of coal-fired power plants. This article reports an investigation on the synthesis of CNTs using H 2 doped CH 4 flames. For a baseline study, nanostructures formed in diffusion flames of 100% CH 4 at different fuel flow rates have been analyzed. Initially the yield of nanomaterials increases with the increase in H 2 doping in the fuel mixture. However, at higher H 2 concentration (.10%) and flow velocity (Jet Exit Reynolds number .200), formation of nanostructures diminishes and H 2 -CH 4 flames produce amorphous carbon and soot particles. The maximum yield of nanostructures occurs at 95-5% CH 4 -H 2 fuel compositions and 8.37E-07 m 3 /s (corresponding Jet Exit Reynolds number5200). Raman analyses of the pristine samples show the existence of distinctive multi-walled carbon nanotube (MWNT) D and G bands at 1321 cm 21 and 1595 cm 21 , respectively. Infrared absorption measurements of vibrational line characteristics of CNTs also reveal the presence of C-H bonds.

show abstract

“…Considering the above, the present study aims to investigate the mechanical behaviour of a polymeric material reinforced with fullerenes C 60 . In view of the fact that experimental procedures (Ballav, 2005;Wondmagegn and Curran, 2006;Bronnikov et al, 2017;Zuev, 2011Zuev, , 2012 are excessively costly for the material characterization of polymer-fullerene nanocomposite systems, numerical techniques such as molecular dynamics (MD) (Sharma et al, 2015(Sharma et al, , 2016 seem to be very attractive for predicting and investigating their performance. Therefore, in the present study a hybrid numerical multiscale technique based on MD (Sharma et al, 2015(Sharma et al, , 2016, finite element method (FEM) (Tserpes and Papanikos, 2014) and unit cell methods (Marur, 2004) has been implemented to characterize the elastic mechanical properties of a polymeric material reinforced uniformly with molecules C 60 .…”

Section: Introductionmentioning

confidence: 99%

Combining FEM and MD to simulate C₆₀/PA-12 nanocomposites

Giannopoulos

Georgantzinos

Tsiamaki

et al. 2019

IJSI

View full text Add to dashboard Cite

Purpose The purpose of this paper is the computation of the elastic mechanical behaviour of the fullerene C60 reinforced polyamide-12 (PA-12) via a two-stage numerical technique which combines the molecular dynamics (MD) method and the finite element method (FEM). Design/methodology/approach At the first stage, the proposed numerical scheme utilizes MD to characterize the pure PA-12 as well as a very small cubic unit cell containing a C60 molecule, centrally positioned and surrounded by PA-12 molecular chains. At the second stage, a classical continuum mechanics (CM) analysis based on the FEM is adopted to approximate the elastic mechanical performance of the nanocomposite with significantly lower C60 mass concentrations. According to the computed elastic properties arisen by the MD simulations, an equivalent solid element with the same size as the unit cell is developed. Then, a CM micromechanical representative volume element (RVE) of the C60 reinforced PA-12 is modelled via FEM. The matrix phase of the RVE is discretized by using solid finite elements which represent the PA-12 mechanical behaviour predicted by MD, while the C60 neighbouring location is meshed with the equivalent solid element. Findings Several multiscale simulations are performed to study the effect of the nanofiller mass fraction on the mechanical properties of the C60 reinforced PA-12 composite. Comparisons with other corresponding experimental results are attempted, where possible, to test the performance of the proposed method. Originality/value The proposed numerical scheme allows accurate representation of atomistic interfacial effects between C60 and PA-12 and simultaneously offers a significantly lower computational cost compared with the MD-only method.

show abstract

Some experimental results on polyN-vinylcarbazole–buckminsterfullerene (C60) nanocomposite system

Cited by 16 publications

References 23 publications

Synthesis and Characterization of Gd@C₈₂-PVK and C₆₀-PVK–A Kind of Fullerene-Grafted Polymer

Synthesis and Characterization of Gd@C₈₂-PVK and C₆₀-PVK–A Kind of Fullerene-Grafted Polymer

Flame Synthesis of Multi‐walled Carbon Nanotubes Using CH₄‐H₂Fuel Blends

Combining FEM and MD to simulate C₆₀/PA-12 nanocomposites

Contact Info

Product

Resources

About

Some experimental results on polyN-vinylcarbazole–buckminsterfullerene (C60) nanocomposite system

Cited by 16 publications

References 23 publications

Synthesis and Characterization of Gd@C82-PVK and C60-PVK–A Kind of Fullerene-Grafted Polymer

Synthesis and Characterization of Gd@C82-PVK and C60-PVK–A Kind of Fullerene-Grafted Polymer

Flame Synthesis of Multi‐walled Carbon Nanotubes Using CH4‐H2Fuel Blends

Combining FEM and MD to simulate C60/PA-12 nanocomposites

Contact Info

Product

Resources

About

Synthesis and Characterization of Gd@C₈₂-PVK and C₆₀-PVK–A Kind of Fullerene-Grafted Polymer

Synthesis and Characterization of Gd@C₈₂-PVK and C₆₀-PVK–A Kind of Fullerene-Grafted Polymer

Flame Synthesis of Multi‐walled Carbon Nanotubes Using CH₄‐H₂Fuel Blends

Combining FEM and MD to simulate C₆₀/PA-12 nanocomposites