scholarly journals Влияние обработки в He:O плазме на структуру многостенных углеродных нанотрубок

2022 ◽  
Vol 48 (5) ◽  
pp. 11
Author(s):  
В.В. Болотов ◽  
Е.В. Князев ◽  
С.Н. Несов
Keyword(s):  
Carbon Nanotubes ◽  
Plasma Treatment ◽  
Functional Groups ◽  
Electrical Resistance ◽  
Chemical Bonds ◽  
Graphene Layers ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

The functionalization of multi-walled carbon nanotubes in He:O plasma is investigated. It's shown that plasma treatment leads to the removal of defective outer graphene layers and their fragments due to oxidation. It is established that the surface of functionalized multi-walled carbon nanotubes contains numerous uncoordinated carbon atoms and oxygen-containing functional groups. The preservation of the structure of the internal graphene layers of nanotubes and the formation of broken chemical bonds ensures a decrease in electrical resistance. At the same time, there is a narrowing of the distribution of electrical resistance values of nanotube ensembles.

Pebax-1657 mixed matrix membrane containing surface modified multi-walled carbon nanotubes for gas separation

RSC Advances ◽  
2016 ◽  
Vol 6 (83) ◽  
pp. 79563-79577 ◽  
Author(s):  
S. A. Habibiannejad ◽  
A. Aroujalian ◽  
A. Raisi
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Functional Groups ◽  
Gas Separation ◽  
Mixed Matrix Membrane ◽  
Mixed Matrix ◽  
Multi Walled Carbon Nanotubes ◽  
Surface Modified ◽  
Walled Carbon Nanotubes

In this study different functional groups on the surface of carbon nanotube enhanced the performance of Pebax 1657/MWNTs.

Plasma treatment of multi-walled carbon nanotubes for lipase immobilization

2016 ◽  
Vol 33 (5) ◽  
pp. 1653-1658 ◽  
Author(s):  
Xun Cao ◽  
Rui Zhang ◽  
Wei-min Tan ◽  
Ce Wei ◽  
Jing Wang ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Plasma Treatment ◽  
Lipase Immobilization ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

The electrical resistance of electrodes made of multi walled carbon nanotubes is modulated by nIR-laser

2016 ◽  
Vol 166 ◽  
pp. 45-49 ◽  
Author(s):  
Juan Bernal-Martínez ◽  
Rafael Godínez-Fernández ◽  
Manuel Roman-Aguirre ◽  
Alfredo Aguilar-Elguezabal
Keyword(s):  
Carbon Nanotubes ◽  
Electrical Resistance ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes ◽  
Nir Laser

Effects of CNT Doping Level and Water/Cement Ratio on the Piezoresistivity of CNTS/Cement Composites

2010 ◽  
Author(s):  
Baoguo Han ◽  
Xun Yu ◽  
Jinping Ou
Keyword(s):  
Carbon Nanotubes ◽  
Compressive Stress ◽  
Electrical Resistance ◽  
Doping Level ◽  
Experimental Results ◽  
Cement Composites ◽  
Cement Ratio ◽  
Water Cement Ratio ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

The carbon nanotubes (CNTs)/cement composites with different doping levels of multi-walled carbon nanotubes (MWNTs) and water/cement ratios are fabricated. By comparing the responses of electrical resistance of these CNTs/cement composites to compressive stress, the effects of MWNT doping level and water/cement ratio on the piezoresistive sensitivity of composites are investigated. Experimental results indicate that the piezoresistive sensitivities of CNTs/cement composites with 0.05 wt. %, 0.1 wt. % and 1 wt. % of MWNTs firstly increase and then decrease with the increase of CNT doping levels. The electrical resistance of CNTs/cement composites 0.6 water/cement ratio is more sensitive to compressive stress than that of composites with 0.45 water/cement ratio.

Piezoresistive Properties of Cement Mortar with Carbon Nanotube

2011 ◽  
Vol 284-286 ◽  
pp. 310-313
Author(s):  
Zhi Gang Liu ◽  
Li Rong Yang ◽  
Jun Cong Wei ◽  
Bao Hui Zhao ◽  
Xiao Xin Feng
Keyword(s):  
Carbon Nanotubes ◽  
Compressive Strength ◽  
Silica Fume ◽  
Electrical Resistance ◽  
Cement Mortar ◽  
Strength Development ◽  
Cement Mortars ◽  
Multi Walled Carbon Nanotubes ◽  
Compressive Strength Development ◽  
Walled Carbon Nanotubes

The compressive strength and piezoresistive property of cement mortar with low adding level of multi-walled carbon nanotubes (MWCNTs) were investigated. Experimental results showed that the compressive strength of the MWCNTs/cement mortars increased with the adding amount of MWCNTs content for all the curing ages. Silica fume promoted the compressive strength development by well bonding with MWCNTs and filling effect. The electrical resistance changed synchronously with the compressive strength and the amount of the changes varied with the stress and MWCNTs addition levels. Higher MWCNTs doping level improved the piezoresistive sensitivity of the mortar. The mortar with silica fume (5-10% by weight of cement) exhibited better piezoresistive response than that without silica fume at the same MWCNTs doping levels.

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