scholarly journals Synthesis of high-quality carbon nanotube fibers by controlling the effects of sulfur on the catalyst agglomeration during the direct spinning process

RSC Advances ◽  
2015 ◽  
Vol 5 (52) ◽  
pp. 41894-41900 ◽  
Author(s):  
Sung-Hyun Lee ◽  
Junbeom Park ◽  
Hye-Rim Kim ◽  
Jaegeun Lee ◽  
Kun-Hong Lee
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Iron Catalyst ◽  
High Quality ◽  
Spinning Process ◽  
Carbon Nanotube Fibers

The effects of sulfur on the size of iron catalyst particles and synthesized carbon nanotubes (CNTs) were investigated during the direct spinning of CNT fibers.

Theoretical and experimental investigation of the wet-spinning process for mechanically strong carbon nanotube fibers

2021 ◽  
Vol 412 ◽  
pp. 128650
Author(s):  
Hyeon Dam Jeong ◽  
Seo Gyun Kim ◽  
Gyeong Min Choi ◽  
Minji Park ◽  
Bon-Cheol Ku ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Carbon Nanotube ◽  
Wet Spinning ◽  
Spinning Process ◽  
Carbon Nanotube Fibers

Porous and strong three-dimensional carbon nanotube coated ceramic scaffolds for tissue engineering

2015 ◽  
Vol 3 (42) ◽  
pp. 8337-8347 ◽  
Author(s):  
P. Newman ◽  
Z. Lu ◽  
S. I. Roohani-Esfahani ◽  
T. L. Church ◽  
M. Biro ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Tissue Engineering ◽  
Carbon Nanotube ◽  
Three Dimensional ◽  
Biological Properties ◽  
Porous Structures ◽  
High Quality

A method to coat high-quality uniform coatings of carbon nanotubes throughout 3D porous structures is developed. Testing of their physical and biological properties demonstrate their potential for application in tissue engineering.

scholarly journals The shape of the orientation distribution of carbon nanotubes in aligned arrays

2014 ◽  
Vol 70 (a1) ◽  
pp. C596-C596
Author(s):  
Ulla Vainio ◽  
Thea Schnoor ◽  
Sarathlal Koyiloth Vayalil ◽  
Karl Schulte ◽  
Martin Müller ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Iron Catalyst ◽  
Chemical Vapour ◽  
Orientation Distribution ◽  
Steric Interaction ◽  
Nanotube Arrays ◽  
X Ray ◽  
Carbon Nanotube Arrays ◽  
Vertically Aligned

Recent simulations of vertically aligned carbon nanotube arrays have shown that the shape of the orientation distribution of nanotubes within the array has a drastic effect on the electrical properties of the array. Orienting of shape-anisotropic objects can be carried out in several different ways such as shearing, magnetically steering, or by vibrating the objects. Nevertheless, perfect orientation is difficult if not impossible to achieve. In the case of the growth of carbon nanotube arrays, self-confinement can occur affecting the resultant orientation distribution. Yet so far the shape of the orientation distribution has not been quantified in great detail and it has been mostly assumed to be Gaussian or Lorentzian. In the present work, multi-walled carbon nanotube arrays were grown via aerosol-assisted chemical vapour deposition with iron catalyst and investigated using small-angle X-ray scattering, a method perfectly suited to characterizing the orientation of carbon nanotubes. Using a microfocused X-ray beam of 24 μm x 17 μm in size at beamline P03 of the PETRA III synchrotron storage ring in Hamburg, we determined the orientation distribution of the vertically aligned carbon nanotubes along the film height. Remarkably, the packing density of the carbon nanotubes seems to correlate not only with the width of the distribution but also its shape. The shape of the orientation distribution was then compared to that from different oriented systems. These findings indicate that by using alignment methods that are based on steric interaction between particles, such as shearing or self-confinement during particle growth, the system will reach an alignment with an orientation distribution closer to the Laplace distribution than to the normal distribution. Such a finding has profound implications for simulation studies of mechanical, electrical and other properties of many hierarchical materials.

Synthesis of carbon nanotube fibers using the direct spinning process based on Design of Experiment (DOE)

Carbon ◽  
2016 ◽  
Vol 100 ◽  
pp. 647-655 ◽  
Author(s):  
Sung-Hyun Lee ◽  
Junbeom Park ◽  
Hye-Rim Kim ◽  
Taeseon Lee ◽  
Jaegeun Lee ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Design Of Experiment ◽  
Spinning Process ◽  
Carbon Nanotube Fibers

Preparation and Characterization of Aligned Carbon Nanotube Fibers

2013 ◽  
Vol 275-277 ◽  
pp. 1794-1797
Author(s):  
Yong Feng Luo ◽  
Cui Zhou ◽  
Xi Li ◽  
Shui Li ◽  
Zhong Zhi Sheng
Keyword(s):  
Carbon Nanotube ◽  
Vapor Deposition ◽  
Chemical Vapor ◽  
Deposition Process ◽  
High Quality ◽  
Dry Spinning ◽  
Excellent Mechanical Property ◽  
Cnt Arrays ◽  
Carbon Nanotube Fibers

High-quality carbon nanotube (CNT) arrays have been synthesized through a chemical vapor deposition process. The Fe/Al2O3 on silicon was used as the catalyst, ethylene as the carbon source, and a mixture gas of Ar and H2 gases as the carrying gas. With spinnable CNT arrary as initial materials, aligned carbon nanotube fibers were continuously fabricated by dry spinning. And then we study the excellent mechanical property of the carbon nanotube fibers.

Fabrication of high-quality carbon nanotube fibers for optoelectronic applications

2012 ◽  
Vol 97 ◽  
pp. 78-82 ◽  
Author(s):  
Yongfeng Luo ◽  
Zhiqiang Gong ◽  
Mengdong He ◽  
Xinjun Wang ◽  
Zhihang Tang ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
High Quality ◽  
Optoelectronic Applications ◽  
Carbon Nanotube Fibers

Synthesis of High-Quality Single-Walled Carbon Nanotube Fibers by Vertical CVD

2010 ◽  
Vol 19 (5) ◽  
pp. 377-384 ◽  
Author(s):  
Tae-Min Kim ◽  
Woo-Seok Song ◽  
Yoo-Seok Kim ◽  
Soo-Youn Kim ◽  
Won-Chel Choi ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
High Quality ◽  
Single Walled Carbon Nanotube ◽  
Single Walled Carbon ◽  
Carbon Nanotube Fibers

Effect of microwave irradiation on carbon nanotube fibers: exfoliation, structural change and strong light emission

RSC Advances ◽  
2014 ◽  
Vol 4 (30) ◽  
pp. 15502-15506 ◽  
Author(s):  
Huanhuan Sun ◽  
Jinquan Wei ◽  
Jialin Sun ◽  
Chuangang Ning ◽  
Jialin Zhu ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Structural Change ◽  
Microwave Irradiation ◽  
Structural Changes ◽  
Light Emission ◽  
Carbon Clusters ◽  
Strong Light ◽  
Carbon Nanotube Fibers

When excited by microwaves, carbon clusters of C2 are exfoliated from carbon nanotubes, leading to structural changes and strong light emission.

High electrical conductivity of double-walled carbon nanotube fibers by hydrogen peroxide treatments

2016 ◽  
Vol 4 (1) ◽  
pp. 74-82 ◽  
Author(s):  
A. Morelos-Gómez ◽  
M. Fujishige ◽  
S. Magdalena Vega-Díaz ◽  
I. Ito ◽  
T. Fukuyo ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Electrical Conductivity ◽  
Hydrogen Peroxide ◽  
Electrical Resistivity ◽  
Carbon Nanotube ◽  
Small Diameter ◽  
High Electrical Conductivity ◽  
Carbon Nanotube Fibers ◽  
Fiber Sample

H2O2treatment can decrease the electrical resistivity of double walled carbon nanotube fibers. The experimental observations suggest that small diameter carbon nanotubes are removed from the fiber sample.

Sign in / Sign up

Export Citation Format

Share Document