Influence of Processing on the Properties of Carbon Nanotubes/Alumina Hybrid Compound Filled PDMS Composites

2013 ◽  
Vol 812 ◽  
pp. 198-203 ◽  
Author(s):  
Nosbi Norlin ◽  
Md Akil Hazizan
Keyword(s):  
Carbon Nanotubes ◽  
Vapour Deposition ◽  
Chemical Vapour ◽  
Multiwall Carbon Nanotubes ◽  
Infrared Spectrometry ◽  
Fourier Transform Infrared Spectrometry ◽  
Hybrid Compound ◽  
Vacuum Oven ◽  
Cvd Method ◽  
Multiwall Carbon

The aim of this study is to investigate the properties of Polydimethylsiloxane (PDMS)/MWCNT-Al2O3 nanocomposites. The multiwall carbon nanotubes MWCNT-Al2O3 hybrid compound was synthesized using chemical vapour deposition (CVD) method. The nanocomposites were produced by using Sonicator (ultrasonic processor) instrument and followed by casting in the vacuum oven. The content of MWCNT-Al2O3 was varied between 0.5 and 1.5% by weight. The results showed that the MWCNT-Al2O3 was well dispersed in PDMS. The interaction between PDMS and MWCNT-Al2O3 was investigated using Fourier transform infrared spectrometry (FTIR). The mechanical properties of the composite were examined by tensile test. The results showed that the greater of MWCNT-Al2O3 hybrid compound in PDMS composites resulted in lower tensile properties.

Effect of Calcination and Reduction Process on MWCNT Growth during Synthesizing MWCNT-Alumina Hybrid as Composite Reinforcement

2011 ◽  
Vol 364 ◽  
pp. 475-479 ◽  
Author(s):  
Muhammad Helmi Abdul Kudus ◽  
Md Akil Hazizan ◽  
Mohamad Hasmaliza
Keyword(s):  
Carbon Nanotube ◽  
Chemical Vapour Deposition ◽  
Vapour Deposition ◽  
Chemical Vapour ◽  
Reduction Process ◽  
Multiwall Carbon Nanotube ◽  
Hybrid Compound ◽  
Cvd Method ◽  
Multiwall Carbon ◽  
Composite Reinforcement

Multiwall carbon nanotube (MWCNT) and alumina hybrid compound prepared via chemical vapour deposition (CVD). The CVD process always reported that the catalyst must undergo calcinations and reduction process before growing the carbon nanotube (CNT). In this work, MWCNT-alumina hybrid was successfully synthesized via simple CVD method. The morphologies study showed that the MWCNT-alumina hybrid with calcination and reduction, and calcination without reduction has been successfully synthesized.

Effect of Catalyst Calcination Temperature on the Synthesis of MWCNTs-Talc Hybrid Compound Using CVD Method

2013 ◽  
Vol 594-595 ◽  
pp. 63-67
Author(s):  
Siti Shuhadah Mohd Saleh ◽  
Hazizan Md Akil ◽  
Ramdziah Md. Nasir ◽  
Muhammad Razlan Zakaria ◽  
Muhammad Helmi Abdul Kudus
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Source ◽  
Calcination Temperature ◽  
Chemical Vapour ◽  
Catalytic Decomposition ◽  
Metal Catalyst ◽  
Hybrid Compound ◽  
Calcination Temperatures ◽  
Cvd Method ◽  
Multi Walled Carbon Nanotubes

Carbon nanotubes-talc (CNTs-talc) hybrid compound has been successfully synthesized via chemical vapour deposition (CVD) method. A gas mixture of methane/nitrogen (CH4/N2) was used as the carbon source and nickel as the metal catalyst for the growth of CNT hybrid compound. Talc works as substrate or support material which is combined with nickel to form a complex metal-talc catalyst that will react with carbon source to produce the hybrid compound. To study the effect of different calcinations temperature, four different calcinations temperature, 300 °C (C-talc300), 500 °C (C-talc500), 700 °C (C-talc700) and 900 °C (C-talc900) were used. Among these four calcination temperatures for synthesis the multi-walled carbon nanotubes (MWCNTs), C-talc500 is the most optimum calcination temperature to perform catalytic decomposition by reacting in methane atmosphere at 800 °C to produce the CNT-talc hybrid compound.

An Easy Methodology for the Incorporation of Carbon Nanotubes on Surfaces of Components Applied as Electronic Devices

2012 ◽  
Vol 18-19 ◽  
pp. 157-163
Author(s):  
M. Pérez-Cadenas ◽  
A. Maroto-Valiente ◽  
I. Rodríguez-Ramos ◽  
A. Guerrero-Ruíz
Keyword(s):  
Carbon Nanotubes ◽  
Photoelectron Spectroscopy ◽  
Iron Catalyst ◽  
Substrate Surface ◽  
Electronic Devices ◽  
Chemical Vapour ◽  
Multiwall Carbon Nanotubes ◽  
Transmission Electron ◽  
Vertically Aligned ◽  
Multiwall Carbon

Carbon nanotubes are grown by catalytic chemical vapour deposition over components of electronic devices. Samples are analyzed by thermogravimetry, scanning and transmission electron microscopy and X-ray photoelectron spectroscopy. The carbon materials deposited on the microchips present the morphology of multiwall carbon nanotubes and grow vertically aligned on the substrates. The preparation procedure parameters are changed to control sizes and height of the grown multiwall carbon nanotubes. The selectivity to incorporate, or not, carbon nanotubes depends on the chemical composition of the substrate. While carbon nanotubes are efficiently grown on Au surfaces, this reaction does not occur on Pt surfaces. These results correlate with a heterogeneous nucleation of iron catalyst particles on the substrate surface. The resulting composite materials can find numerous technological applications.

Synthesis and Characterized of Carbon Nanotubes from Fermented Tapioca

2015 ◽  
Vol 1109 ◽  
pp. 365-369 ◽  
Author(s):  
I. Nurulhuda ◽  
R. Poh ◽  
Mat Zain Mazatulikhma ◽  
Mohammad Rusop
Keyword(s):  
Carbon Nanotubes ◽  
Large Scale ◽  
Vapour Deposition ◽  
Chemical Vapour ◽  
Single Walled Carbon Nanotubes ◽  
Radial Breathing Mode ◽  
Raman Shift ◽  
Cvd Method ◽  
Set Up ◽  
Walled Carbon Nanotubes

Carbon nanotubes (CNT) has been synthesized by pyrolysing fermented tapioca liquid using an immersed heater. It was made single-walled carbon nanotubes (SWCNT) through heating at 700, 800 and 900 °C by the chemical vapour deposition (CVD) method and characterized by using Raman spectroscopy, thermogravimetric analysis and field emission scanning electron microscopy (FESEM). The synthesized SWCNT demonstrated larger diameters at 700 °C which decreased at 800 and 900 °C, respectively. The SWCNTs were indicated based on the radial breathing mode (RBM) peak present between 200 - 300 raman shift (cm-1). The diameters of synthesized CNTs ranged between 54 - 200 nm. Raman spectrum revealed that the G-bands were 1569, 1582 and 1576 cm-1, respectively, whereas the D-bands were 1346, 1350 and 1358 cm-1 for SWCNT synthesis at 700, 800 and 900 °C, respectively. The modified CVD method set up in the present study was successfully used for large scale synthesis of CNTs from an aqueous precursor such as fermented tapioca liquid.

Effect of Urea on the Shape and Structure of Carbon Nanotubes

2018 ◽  
Vol 73 (2) ◽  
pp. 113-120 ◽  
Author(s):  
M. R. Elamin ◽  
Babiker Y. Abdulkhair ◽  
Kamal K. Taha
Keyword(s):  
Electron Microscopy ◽  
Carbon Nanotubes ◽  
Chemical Vapour ◽  
Multiwall Carbon Nanotubes ◽  
Nitrogen Adsorption ◽  
X Ray Diffraction ◽  
Transmission Electron ◽  
Adsorption Analysis ◽  
Bet Analysis ◽  
Multiwall Carbon

AbstractCoiled multiwall carbon nanotubes (MWCNTs) were prepared on Fe, Co, and Ni metal oxides supported on α-Al2O3 using urea as fuel and catalyst surface modifying agent by catalytic chemical vapour deposition (CCVD). The shape of the nanotubes was influenced by the addition of urea, where coiled and uncoiled tubes were obtained in the presence and absence of urea, respectively. The MWCNTs were characterized using scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), and nitrogen adsorption analysis. The coiling/uncoiling of the nanotubes was visualized from the SEM and TEM images of the prepared specimens. The XRD data showed the characteristic peaks of the nanotubes. BET analysis of the coiled tubes revealed 85.57 m2 g−1 surface area with a pore diameter 102.2–110.8 Å. A mechanism for the nanotubes coiling is suggested.

Facile synthesis and supercapacitor performances of nitrogen doped CNTs grown over mesoporous Fe/SBA-15 catalyst

2017 ◽  
Vol 41 (20) ◽  
pp. 11591-11599 ◽  
Author(s):  
R. Ragavan ◽  
A. Pandurangan
Keyword(s):  
Carbon Nanotubes ◽  
Electrode Material ◽  
Vapour Deposition ◽  
Chemical Vapour ◽  
High Yield ◽  
Facile Synthesis ◽  
Nitrogen Doped ◽  
Cvd Method ◽  
New Strategy ◽  
Nitrogen Doped Carbon

Herein, we report a new strategy to synthesize high-yield nitrogen-doped carbon nanotubes (NCNTs) using iron-supported SBA-15 as a catalystviathe chemical vapour deposition (CVD) method to utilize them as an electrode material for supercapacitors.

scholarly journals Water Plasma Functionalized CNTs/MnO2Composites for Supercapacitors

2013 ◽  
Vol 2013 ◽  
pp. 1-8 ◽  
Author(s):  
Shahzad Hussain ◽  
Roger Amade ◽  
Eric Jover ◽  
Enric Bertran
Keyword(s):  
Surface Functionalization ◽  
Vapour Deposition ◽  
Chemical Vapour ◽  
Multiwall Carbon Nanotubes ◽  
Additional Increase ◽  
Key Points ◽  
Vertically Aligned ◽  
Anodic Deposition ◽  
Multiwall Carbon ◽  
Discharge Measurements

A water plasma treatment applied to vertically-aligned multiwall carbon nanotubes (CNTs) synthesized by plasma enhanced chemical vapour deposition gives rise to surface functionalization and purification of the CNTs, along with an improvement of their electrochemical properties. Additional increase of their charge storage capability is achieved by anodic deposition of manganese dioxide lining the surface of plasma-treated nanotubes. The morphology (nanoflower, layer, or needle-like structure) and oxidation state of manganese oxide depend on the voltage window applied during charge-discharge measurements and are found to be key points for improved efficiency of capacitor devices. MnO2/CNTs nanocomposites exhibit an increase in their specific capacitance from 678 Fg−1, for untreated CNTs, up to 750 Fg−1, for water plasma-treated CNTs.

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