Factors affecting the size and deposition rate of the cathode deposit in an anodic arc used to produce carbon nanotubes

Carbon ◽  
2008 ◽  
Vol 46 (13) ◽  
pp. 1826-1828 ◽  
Author(s):  
A. Shashurin ◽  
M. Keidar
Keyword(s):  
Carbon Nanotubes ◽  
Deposition Rate ◽  
Cathode Deposit ◽  
Factors Affecting

scholarly journals Progress in Research on Carbon Nanotubes Reinforced Cementitious Composites

2015 ◽  
Vol 2015 ◽  
pp. 1-16 ◽  
Author(s):  
Qinghua Li ◽  
Jintao Liu ◽  
Shilang Xu
Keyword(s):  
Carbon Nanotubes ◽  
Large Scale ◽  
High Strength ◽  
Cementitious Composites ◽  
Scale Production ◽  
Multiwalled Carbon ◽  
Factors Affecting ◽  
Environment And Health ◽  
Research Activities ◽  
Major Factors

As one-dimensional (1D) nanofiber, carbon nanotubes (CNTs) have been widely used to improve the performance of nanocomposites due to their high strength, small dimensions, and remarkable physical properties. Progress in the field of CNTs presents a potential opportunity to enhance cementitious composites at the nanoscale. In this review, current research activities and key advances on multiwalled carbon nanotubes (MWCNTs) reinforced cementitious composites are summarized, including the effect of MWCNTs on modulus of elasticity, porosity, fracture, and mechanical and microstructure properties of cement-based composites. The issues about the improvement mechanisms, MWCNTs dispersion methods, and the major factors affecting the mechanical properties of composites are discussed. In addition, large-scale production methods of MWCNTs and the effects of CNTs on environment and health are also summarized.

Synthesis of Carbon Nanotubes on a Moving Substrate by Laser-Induced Chemical Vapor Deposition

2005 ◽  
Author(s):  
Kinghong Kwok ◽  
Wilson K. S. Chiu
Keyword(s):  
Carbon Nanotubes ◽  
Chemical Vapor Deposition ◽  
Deposition Rate ◽  
Vapor Deposition ◽  
Substrate Surface ◽  
Carbon Film ◽  
Chemical Vapor ◽  
Multi Wall Carbon Nanotubes ◽  
Vapor Deposition Technique ◽  
Synthesis Of Carbon Nanotubes

An open-air laser-induced chemical vapor deposition technique has been successfully used to rapidly deposit pillars of carbon nanotube forest on a moving glass substrate. A CO2 laser is used to heat a traversing fused quartz rod covered with metal particles inside a hydrocarbon environment. Pyrolysis of hydrocarbon precursor gas occurs and subsequently gives rise to the growth of multi-wall carbon nanotubes on the substrate surface. The experimental results indicate that nanotube growth kinetics and microstructure are strongly dependent on the experimental parameters such as laser power. The typical deposition rate of carbon nanotubes achieved in this study is over 50 μm/s, which is relatively high compared to existing synthesis techniques. At high power laser irradiation, carbon fibers and carbon film are formed as a result of excessive formation of amorphous carbon on the substrate. High-resolution transmission and scanning electron microscopy, and x-ray energy-dispersive spectrometry are used to investigate the deposition rate, microstructure and chemical composition of the catalytic surface and the deposited carbon nanotubes.

Probing factors affecting the Raman modes and structural collapse of single-walled carbon nanotubes under pressure

2013 ◽  
Vol 250 (7) ◽  
pp. 1370-1375 ◽  
Author(s):  
Mingguang Yao ◽  
Shuangchen Lu ◽  
Junping Xiao ◽  
Zhen Yao ◽  
Linhai Jiang ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Single Walled Carbon Nanotubes ◽  
Structural Collapse ◽  
Factors Affecting ◽  
Single Walled Carbon ◽  
Raman Modes ◽  
Walled Carbon Nanotubes

Investigation of factors affecting adsorption of transition metals on oxidized carbon nanotubes

2009 ◽  
Vol 167 (1-3) ◽  
pp. 357-365 ◽  
Author(s):  
Zhanming Gao ◽  
Teresa J. Bandosz ◽  
Zongbin Zhao ◽  
Mei Han ◽  
Jieshan Qiu
Keyword(s):  
Carbon Nanotubes ◽  
Transition Metals ◽  
Factors Affecting ◽  
Oxidized Carbon ◽  
Oxidized Carbon Nanotubes

scholarly journals Investigating and Modeling the Factors Affecting Thermal Optimization and Dynamic Viscosity of Water Hybrid Nanofluid/Carbon Nanotubes via MOPSO using ANN

2020 ◽  
Vol 2 (3) ◽  
pp. 108-114
Author(s):  
Amin Moslemi Petrudi ◽  
Ionut Cristian Scurtu
Keyword(s):  
Thermal Conductivity ◽  
Carbon Nanotubes ◽  
Volume Fraction ◽  
Optimization Process ◽  
Hybrid Nanofluid ◽  
Engineering Systems ◽  
Factors Affecting ◽  
Multi Objective ◽  
Ann Modeling ◽  
Artificial Neural Network Ann

Optimization is to find the best answer among existing situations. Optimization is used in the design and maintenance of many engineering systems to minimize costs or maximize profits. Due to the widespread use of optimization in engineering, this topic has grown a lot. In this paper, the optimization of multi-objective of Water Hybrid Nanofluid/Carbon Nanotubes is investigated. Multi-Objective Particle Swarm Optimization (MOPSO) algorithm has been used in order to maximize thermal conductivity and minimum viscosity by changing the temperature (300 to 340 ºk) and the volume fraction (0.01 to 0.4%) of nanofluid. Artificial Neural Network (ANN) modeling of experimental data has been used to obtain the values. Parto fronts, the optimal points and different values are 20 members and 15 iterations, and in order to compare the results optimization process on the first, fifth, tenth fronts, a relation has been proposed to predict the viscosity and Parto fronts in the optimization process. The aim of the study was to optimize nanofluid to reduce viscosity and increase thermal conductivity.

Molecular Interactions in PA6, LCP and their Blend Incorporated with Functionalized Carbon Nanotubes

2010 ◽  
Vol 447-448 ◽  
pp. 634-638 ◽  
Author(s):  
Henry Kuo Feng Cheng ◽  
Nanda Gopal Sahoo ◽  
Lin Li ◽  
Siew Hwa Chan ◽  
Jian Hong Zhao
Keyword(s):  
Carbon Nanotubes ◽  
Polymer Matrices ◽  
Traditional Role ◽  
Factors Affecting ◽  
Crystal Polymer ◽  
Reinforcing Fillers ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes ◽  
Functionalized Mwcnts ◽  
Properties Of Composites

Multi-walled carbon nanotubes (MWCNTs) were functionalized with a carboxyl group (-COOH) to improve their dispersion in a nylon6 (PA6) matrix, a liquid crystal polymer (LCP) and their blend. This functionalized MWCNTs also achieved better interfacial adhesions with both polymer matrices and with both phases in the blend. The dispersion of MWCNT-COOH in the polymer matrices and their interfacial interactions with polymer molecules were found to be the most important factors affecting the properties of composites. Moreover, studies on morphological, rheological, and mechanical properties confirmed that a better miscibility between PA6 and LCP had been constituted in the presence of MWCNT-COOH. Therefore, it is observed that the functionalized MWCNTs not only played the traditional role as reinforcing fillers in the polymer matrices, but also performed a novel role as compatibilizers for their blend.

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