Inelastic Deformations in Multi-Walled Carbon Nanotubes

1999 ◽  
Vol 593 ◽  
Author(s):  
D. Tekleab ◽  
R. Czerw ◽  
A. Rubio ◽  
P.M. Ajayan ◽  
D.L. Carroll
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotubes ◽  
Multiwalled Carbon Nanotubes ◽  
High Power ◽  
Multiwalled Carbon ◽  
Ultrasonic Agitation ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes ◽  
Insight Into

ABSTRACTWe report the use of high power ultrasonic agitation to create inelastic deformations in multiwalled carbon nanotubes. Using STM coupled with TEM we show that this damage can range from kinking to breaking of continuous tube walls into segments. Such deformed tubes provide an insight into the role of re-hybridization in the electrical and mechanical properties of tubes.

Electrodeposited multi-walled carbon nanotubes on Ag-loaded TiO2 nanotubes/Ti plates as a new photocatalyst for dye degradation

RSC Advances ◽  
2015 ◽  
Vol 5 (56) ◽  
pp. 44840-44846 ◽  
Author(s):  
Neda Mohaghegh ◽  
Masoud Faraji ◽  
Fereydoon Gobal ◽  
Mohammad Reza Gholami
Keyword(s):  
Carbon Nanotubes ◽  
Electrochemical Reduction ◽  
Multiwalled Carbon Nanotubes ◽  
Tio2 Nanotubes ◽  
Dye Degradation ◽  
Multiwalled Carbon ◽  
Multi Walled Carbon Nanotubes ◽  
Functionalized Multiwalled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

MWCNTs/Ag/TiO2NTs plates were synthesized via electrochemical reduction of functionalized multiwalled carbon nanotubes (MWCNTs) on Ag/TiO2NTs.

scholarly journals Investigating the influence of multi-walled carbon nanotubes on the mechanical and damping properties of ultra-high performance concrete

2020 ◽  
Vol 27 (1) ◽  
pp. 433-444
Author(s):  
Wenhua Zhang ◽  
Weizhao Zeng ◽  
Yunsheng Zhang ◽  
Fenghao Yang ◽  
Peipei Wu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotubes ◽  
High Performance ◽  
High Performance Concrete ◽  
Damping Properties ◽  
Ultra High Performance Concrete ◽  
Multiwalled Carbon ◽  
Damping Property ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

AbstractIn this paper, the effects of multiwalled carbon nanotubes (MWCNTs) on the mechanical and damping properties of ultra-high performance concrete (UHPC) were investigated. The results show that the proper amount of MWCNTs can improve mechanical properties as well as the damping properties. For the mechanical properties, the compressive strength and flexural strength of the specimens increased with the increase of MWCNTs content in the range of 0~0.05% (mass ratio to cement). However, when the content of MWCNTs was more than 0.05wt.%, the mechanical properties of UHPC could not be improved continually because too many MWCNTs were difficult to disperse and agglomerated easily in UHPC. Similar laws also have been found for the damping property of UHPC. The loss factor of UHPC increased with the increase of MWCNTs content in the range of 0 ~ 0.05%. The incorporation of MWCNTs would introduce a large number of interfaces into UHPC, the friction and slip between interfaces were the main reasons for the improvement of the damping property of UHPC. However, when the content of MWCNTs was more than 0.05%, it was difficult to disperse effectively. As a result, the overall energy consumption efficiency of MWCNTs was decreased.

Synthesis of Carbon Nanotubes, Carbon Spheres and Slices of Vertically Aligned Multi-Walled Carbon Nanotubes

2011 ◽  
Vol 306-307 ◽  
pp. 1325-1329
Author(s):  
Shu Shan Yao
Keyword(s):  
Carbon Nanotubes ◽  
Multiwalled Carbon Nanotubes ◽  
Chemical Vapour ◽  
Carbon Spheres ◽  
Multiwalled Carbon ◽  
Multi Walled Carbon Nanotubes ◽  
Vertically Aligned ◽  
Uniform Diameter ◽  
Synthesis Of Carbon Nanotubes ◽  
Walled Carbon Nanotubes

Carbon nanotubes, carbon spheres and slices of vertically aligned multiwalled carbon nanotubes (MWNTs) were synthesized simultaneously by chemical vapour deposition (CVD). Electron microscopy image showed carbon nanotubes were multiwalled carbon nanotubes, several micrometers in length. Carbon spheres were of uniform diameter (about 1 μm). Slices of vertically aligned multiwalled carbon nanotubes were about 5 mm in length, 3 mm in width and 8 μm in thickness. The interior of the slice was composed of densely packed, vertical aligned MWNTs, and faceted carbon beads. They were stable and easily separated from each other. The formation mechanism of slice was also discussed.

scholarly journals The Role of Multiwalled Carbon Nanotubes in the Mechanical, Thermal, Rheological, and Electrical Properties of PP/PLA/MWCNTs Nanocomposites

2019 ◽  
Vol 3 (3) ◽  
pp. 64 ◽  
Author(s):  
Sohrab Azizi ◽  
Morteza Azizi ◽  
Maryam Sabetzadeh
Keyword(s):  
Carbon Nanotubes ◽  
Tensile Modulus ◽  
Multiwalled Carbon ◽  
Soil Burial ◽  
Melt Compounding ◽  
Terminal Behavior ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes ◽  
Compost Soil

Polypropylene/polylactic acid (PP/PLA) blend (10–40% of PLA) and PP/PLA/MWCNTs nanocomposites (0.5, 1, and 2 wt% of MWCNTs) were prepared via melt compounding. Scanning electron microscopy revealed a co-continuous PLA phase in the PP/PLA blends with high PLA content. Moreover, the addition of 2 wt% multi-walled carbon nanotubes (MWCNTs) increased the tensile modulus and tensile strength of the PP/PLA40% by 60% and 95%, respectively. A conductive network was found with the addition of 2 wt% MWCNTs, where the electrical conductivity of the PP/PLA increased by nine orders of magnitude. At 2 wt% MWCNTs, a solid network within the composite was characterized by rheological assessment, where the composite turned from nonterminal to terminal behavior. Soil burial testing of the PP/PLA blend within 30 days in natural humus compost soil featured suitable biodegradation, which indicates the PP/PLA blend is as an appropriate candidate for food packing applications.

scholarly journals NICKEL-BASED MULTIWALLED CARBON NANOTUBE COMPOSITE COATINGS

2018 ◽  
Vol 56 (3B) ◽  
pp. 144
Author(s):  
Bui Hung Thang ◽  
Nguyen Xuan Toan ◽  
Nguyen Viet Phuong ◽  
Tran Van Hau ◽  
Nguyen Thi Hong ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotubes ◽  
Tensile Strength ◽  
Composite Coatings ◽  
Physical And Mechanical Properties ◽  
Multiwalled Carbon ◽  
Nickel Electrodeposition ◽  
Multi Walled Carbon Nanotubes ◽  
Carbon Nanotube Composite ◽  
Walled Carbon Nanotubes

Carbon nanotubes (CNTs) have been widely known as nanomaterials with excellent mechanical properties. Previous studies reported that the tensile strength of multi-walled carbon nanotubes (MWCNTs) was up to 63 GPa and single-walled carbon nanotubes (SWCNTs) could reach 150 GPa while the highest tensile strength of the steel was found to be about 1.8 GPa. SWCNTs could have Young’s modulus up to 1000 GPa that was much greater than the value of 209 GPa of steel. Therefore, there is a great potential to utilize CNTs as reinforced materials for composites in general and Ni electrodeposition coating in particular to improve hardness, durability, corrosion, and other physical and mechanical properties. This paper presents results of preparing and examining characteristics of the Nickel electrodeposition coatings containing MWCNTs (Ni-MWCNTs). The Ni-MWCNTs composite coatings deposited on a steel plate with the area of 0.4 dm2 using bipolar pulses at 470 Hz and 50oC in a 5-liter bath. Amount of CNTs varying from 1 g/l to 3 g/l was dispersed into the solution by using surfactants and ultrasonic vibration. CNTs used in the study was MWCNTs diameters in the range from 20 to 90 nanometers and few micrometers in length. The SEM, EDS, hardness and adhesion tests were conducted to analyze the properties of the electrodeposition coatings. The obtained results indicated that the hardness and adhesion of the Ni-CNTs coating were 1.5 and 1.46 times, respectively, higher than those of the Ni coating. In addition, adhesion of the Ni-CNTs coating was significantly improved.

Effect of Multiwalled Carbon Nanotubes On Mechanical Properties of Concrete

2012 ◽  
Vol 2 (6) ◽  
pp. 166-168 ◽  
Author(s):  
Dr.T.Ch.Madhavi Dr.T.Ch.Madhavi ◽  
◽  
Pavithra.P Pavithra.P ◽  
Sushmita Baban Singh Sushmita Baban Singh ◽  
S.B.Vamsi Raj S.B.Vamsi Raj ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotubes ◽  
Multiwalled Carbon Nanotubes ◽  
Multiwalled Carbon
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